Publikationen vor 2010
2009 | |
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329. | Serge-Mithérand Tengho Toguem, Alexander Villinger, Peter Langer*, Synlett 2009, 3311-3314. “Site-Selective Suzuki-Miyaura Reactions of 2,3,5-Tribromothiophene”. |
328. | Stefanie Libnow, Michael Lalk, Helmut Reinke, Christine Fischer, Peter Langer*, J. Carbohydr. Chem. 2009, 28, 483-497. “Synthesis of 3-(Pyrazol-3-yl)indol-N-glycosides and their Cytotoxic Activity against Human Keratinocytes (HaCaT)”. |
327. | Muhammad Adeel*, Irshad Ali, Peter Langer, and Alexander Villinger, Acta Cryst. E 2009, E65, o2176. “Methyl 4,6-dimethyl-5-chloro-3-(4-methoxyphenyl)salicylate”. |
326. | Verena Wolf, Muhammad Adeel, Stefanie Reim, Alexander Villinger, Christine Fischer, Peter Langer*, Eur. J. Org. Chem. 2009, 5854-5867. “Synthesis of Chlorinated Arenes by One-Pot Cyclizations of 4-Chloro-1,3-bis(trimethylsilyloxy)-1,3-butadienes”. |
325. | Muhammad Imran, Inam Iqbal, Nasir Rasool, Christine Fischer, Peter Langer*, Tetrahedron 2009, 65, 8794-8801. “Synthesis of 2-(Arylthio)benzoates by [3+3] Cyclocondensations of 3-Arylthio-1-silyloxy-1,3-butadienes with 3-Oxo-orthoesters, 1,1,3,3-Tetramethoxypropane and 1,1-Bis(methylthio)-1-en-3-ones”. |
324. | Mohanad Shkoor, Olumide Fatunsin, Abdolmajid Riahi, Alexander Villinger, Peter Langer*, Tetrahedron Lett. 2009, 50, 5726-5728. “Synthesis of Functionalized Diaryl Selenides by the First Formal [3+3] Cyclocondensations of 1,3-Bis(silyloxy)-1,3-butadienes with Organoselenium Compounds”. |
323. | Vahuni Karapetyan, Satenik Mkrtchyan, Gagik Ghazaryan, Alexander Villinger, Christine Fischer, Peter Langer*, Tetrahedron 2009, 65, 9271-9279. “Synthesis of Dichloromethyl-Substituted Salicylates and Pyran-4-ones by Cyclocondensation of 1,3-Bis(silyloxy)-1,3-butadienes with 1,1-Dimethoxy-4,4-dichlorobut-1-en-3-one. Control of the C,C- and C,O-Regioselectivity by the Choice of Lewis Acid”. |
322. | Munawar Hussain, Imran Malik, Peter Langer*, Synlett 2009, 2691-2695. “Efficient Synthesis of Functionalized 2,3-Di(alkenyl)benzothiophenes and Dibenzothiophenes based on the First Heck Reactions of 2,3-Di- and 2,3,5-Tribromobenzothiophene”. |
321. | Abdolmajid Riahi, Mohanad Shkoor, Olumide Fatunsin, Mirza A. Yawer, Ibrar Hussain, Christine Fischer, and Peter Langer*, Tetrahedron 2009, 65, 9300-9315. “Synthesis of amino- and nitroarenes based on regioselective [3+3] cyclocondensations of 1,3-bis(silyloxy)-1,3-butadienes”. |
320. | Serge-Mithérand Tengho Toguem, Munawar Hussain, Imran Malik, Alexander Villinger, Peter Langer*, Tetrahedron Lett. 2009, 50, 4962-4964. “Synthesis of Functionalized Benzothiophenes by Twofold Heck and subsequent 6p-Electrocyclization Reactions of 2,3-Dibromothiophene”. |
319. | Inam Iqbal, Muhammad Imran, Nasir Rasool, Muhammad A. Rashid, Munawar Hussain, Alexander Villinger, Christine Fischer, Peter Langer*, Tetrahedron 2009, 65, 7562-7572. “Synthesis of Functionalized 2-(Arylthio)benzoates by Formal [3+3] Cyclizations of 3-Arylthio-1-silyloxy-1,3-butadienes with 3-Silyloxy-2-en-1-ones and 1,1-Diacylcyclopropanes”. |
318. | Ihsan Ullah, Rasheed Ahmad Khera, Munawar Hussain, Peter Langer*, Tetrahedron Lett. 2009, 50, 4651-4653. “Synthesis of Tetraarylquinones by Suzuki Cross-Coupling Reactions of Tetrabromobenzoquinone”. |
317. | Abdolmajid Riahi, Mohanad Shkoor, Olumide Fatunsin, Rasheed Ahmad Khera, Christine Fischer, Peter Langer*, Org. Biomol. Chem. 2009, 7, 4248-4251. “Regioselective synthesis of 4-acyl-1-hydroxy-2,3-benzodioates by chelation-controlled [3+3] annulation of 3-acyl-4-ethoxy-2-oxo-3-enoates with 1,3-bis(trimethylsilyloxy)-1,3-butadienes.” |
316. | Muhammad Nawaz, Muhammad Adeel, Muhammad Farooq Ibad, Peter Langer*, Synlett 2009, 2154-2156. “Synthesis of functionalized 2′,4-diarylbenzophenones based on site-selective Suzuki cross-coupling reactions”. |
315. | Abdolmajid Riahi, Martina Wurster, Michael Lalk,* Ulrike Lindequist, Peter Langer*, Bioorg. Med. Chem. 2009, 17, 4323-4326. “Synthesis and Antimicrobial Activity of 4-Hydroxy-4-(pyridyl)alk-3-en-2-ones”. |
314. | Alina Bunescu, Sebastian Reimann, Mathias Lubbe, Anke Spannenberg, Peter Langer*, J. Org. Chem. 2009, 74, 5002-5010. “Synthesis of Trifluoromethyl-Substituted Arenes, Cyclohexenones and Pyran-4-ones by Cyclocondensation of 1,3-Bis(silyloxy)-1,3-butadienes with 1,1-Dimethoxy-4,4,4-trifluorobut-1-en-3-one. Influence of the Lewis Acid on the Product Distribution”. |
313. | Vahuni Karapetyan, Satenik Mkrtchyan, Mathias Lubbe, Alexander Villinger, Peter Langer*, Tetrahedron 2009, 65, 6211-6217. “Synthesis of 6-Formylsalicylates based on Regioselective [3+3] Cyclocondensations of 1,3-Bis(silyloxy)-1,3-butadienes with 1,1-Dichloro-4-ethoxy-3-buten-2-ones”. |
312. | Nicole Höttecke, Christine Fischer, Helmut Reinke, Peter Langer*, Z. Naturforsch. B. 2009, 64b, 699-706. “Synthesis of Bicyclic Salicylates by [3+3] Cyclization of 1,3-Bis(Silyl Enol Ethers) with Cyclic 3-(Silyloxy)alk-2-en-1-ones”. |
311. | Eline M Basílio Janke, Sebastian Schlund, Bernd Engels*, Rüdiger Dede, Ibrar Hussain, Peter Langer*, Michael Rettig, Klaus Weisz*, J. Org. Chem. 2009, 74, 4878-4881. “Tautomeric Equilibria of 3-Formylacetylacetone by Low-Temperature NMR Spectroscopy and ab initio Calculations”. |
310. | Munawar Hussain, Nguyen Thai Hung, Peter Langer*, Tetrahedron Lett. 2009, 50, 3929-3932. “Efficient Synthesis of Functionalized Dibenzofurans by Domino Twofold Heck / 6p-Electrocyclization¢ Reactions of 2,3-Di- and 2,3,5-Tribromobenzofuran”. |
309. | Peter Langer*, Guest Editor, Tetrahedron Symposium-in-Print 2009, 65, 5455. “Recent Advances in Organosilicon Chemistry directed towards Organic Synthesis. Foreword” |
308. | Franziska Bendrath and Peter Langer*, Curr. Org. Chem. 2009, 13, 955-964. “2-Isocyanatobenzonitrile and 2‑Isothiocyanatobenzonitrile – Versatile Building Blocks in Organic Synthesis”. |
307. | Muhammad Imran, Inam Iqbal, Peter Langer*, Synlett 2009, 1477-1479. “Regioselective Synthesis of 2-Arylthio-4-(methoxy)benzoates by the First [3+3] Cyclocondensations of 3-Arylthio-1-silyloxy -1,3-butadienes with 3-Oxo-orthoesters”. |
306. | Mohanad Shkoor, Abdolmajid Riahi, Olumide Fatunsin, Helmut Reinke, Christine Fischer, Peter Langer*, Synthesis 2009, 2223-2235. “Diversity-oriented synthesis of functionalized diaryl-sulfones by regioselective [3+3] cyclocondensations of 1,3-bis(silyloxy)-1,3-butadienes with 2-arylsulfonyl-3-ethoxy-2-en-1-ones”. |
305. | Orazio A. Attanasi*, Gianfranco Favi, Gianluca Giorgi, Fabio Mantellini, Vahuni Karapetyan, Peter Langer*, Tetrahedron 2009, 65, 5456-5461 (Symposium-in-Print). “Regioselective synthesis of spiro-cyclopropanated 1-aminopyrrol-2-ones by Bi(OTf)3-catalyzed one-pot ′Mukaiyama-Michael addition/cyclization/ring-contraction′ reactions of 1,2-bis(trimethylsilyloxy)-cyclobutene with 1,2-diaza-1,3-butadienes”. |
304. | Tung T. Dang, Tuan T. Dang, Nasir Rasool, Alexander Villinger, Peter Langer*, Adv. Synth. Catal. 2009, 351, 1595-1609. “Regioselective Palladium(0)-Catalyzed Cross-Coupling Reactions and Metal-Halide Exchange Reactions of Tetrabromothiophene: Optimization, Scope and Applications”. |
303. | Christian Haase, Peter Langer*, Tetrahedron 2009, 65, 4530-4539. “Synthesis of 5-alkylidene-2,5-dihydropyrrol-2-ones based on cyclizations of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with oxalyl chloride”. |
302. | Peter Langer*, Synlett 2009, 2205-2216 (account). “Synthesis of Fluorinated Arenes and Hetarenes based on One-Pot Cyclizations of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes”. |
301. | Abdolmajid Riahi, Mohanad Shkoor, Rasheed Ahmad Khera, Helmut Reinke, Peter Langer*, Tetrahedron Lett. 2009, 50, 3017-3019. “Regioselective synthesis of functionalized 4-nitro- and 4-aminophenols based on formal [3+3] cyclocondensations of 3-ethoxy-2-nitro-2-en-1-ones with 1,3-bis(silyloxy)-1,3-butadienes”. |
300. | Munawar Hussain, Tung T. Dang, Peter Langer*, Synlett 2009, 1822-1826. “Synthesis of Carbazoles and 1,2-Dihydrocarbazoles by 'Domino Twofold Heck / 6π-Electrocyclization' Reactions of Di- and Tribromo-N-methylindoles”. |
299. | Rasheed Ahmad, Rasheed Ahmad Khera, Alexander Villinger, Peter Langer*, Tetrahedron Lett. 2009, 50, 3020-3022. “One-pot synthesis of 2,3-dihydro-4H-pyran-4-ones by cyclocondensation of 1,3-diketone dianions with aldehydes”. |
298. | Muhammad Adeel, Muhammad Nawaz, Alexander Villinger, Helmut Reinke, Christine Fischer, Peter Langer*, Tetrahedron 2009, 65, 4099-4105. “Synthesis of Polyketide-Type Phenols by Domino ′Michael / Retro-Michael / Aldol′ Reactions of 3-Formylchromones with Silyl Enol Ethers derived from Ethyl 3,5-Dioxohexanoate”. |
297. | Gerson Mroß, Helmut Reinke, Christine Fischer, Peter Langer*, Tetrahedron 2009, 65, 3910-3917. “Synthesis of Functionalized 2-Alkoxybenzoates, 2-Aryloxybenzoates and Xanthones based on Formal [3+3] Cyclocondensations of 3-Alkoxy- and 3-Aryloxy-1-silyloxy-1,3-butadienes with 3-Silyloxy-2-en-1-ones”. |
296. | Inam Iqbal, Muhammad Imran, Peter Langer*, Synthesis 2009, 2430-2434. “Synthesis of 5-Arylthio-3-hydroxyphthalates by the First [4+2] Cycloadditions of 3-Arylthio-1-silyloxy-1,3-butadienes with Dimethyl Acetylenedicarboxylate”. |
295. | Constantin Mamat*, Helmut Reinke, Peter Langer*, Z. Naturforsch. B. 2009, 64b, 423-426. “NMR Studies and Crystal Structure Determinations of CF3 Group Containing Bicyclic Phenolates”. |
294. | Abdolmajid Riahi, Matthias Lau, Helmut Reinke, Christine Fischer, Peter Langer*, Tetrahedron 2009, 65, 5491-5496 (Symposium-in-Print). “Regioselective synthesis of functionalized 3-aryl-4-(chloroethyl)phenols by domino ′[3+3] cyclization / homo-Michael′ reactions of 1,3-bis(silyloxy)-1,3-butadienes with 1-formyl- and 1-acetyl-1-aroyl-cyclopropanes”. |
293. | Thomas Rahn, Bettina Appel, Wolfgang Baumann, Haijun Jiao, Christine Fischer, Armin Börner, Peter Langer*, Org. Biomol. Chem. 2009, 7, 1931-1938. “Synthesis of chromones and 4-hydroxyquinolines based on uncatalyzed condensations of 1-methoxy-1,3-bis(trimethylsilyloxy)-1,3-butadiene with 2-alkoxy- and 2-nitrobenzoyl chlorides”. |
292. | Mohanad Shkoor, Abdolmajid Riahi, Olumide Fatunsin, Ibrar Hussain, Mirza A. Yawer, Mathias Lubbe, Stefanie Reim, Helmut Reinke, Christine Fischer, Peter Langer*, Org. Biomol. Chem. 2009, 7, 2182-2186. “Diversity-Oriented Synthesis of 1-Hydroxy-2,4-benzodioates by Regioselective [3+3] Cyclocondensations of 1,3-Bis(silyloxy)-1,3-butadienes with 3-Alkoxy- and 3-Silyloxy-2-alkoxycarbonyl-2-en-1-ones”. |
291. | Abdolmajid Riahi, Olumide Fatunsin, Mohanad Shkoor, Rüdiger Dede, Helmut Reinke, Christine Fischer, Peter Langer*, Synthesis 2009, 1623-1634. “First Synthesis of 5-Cyanosalicylates by Formal [3+3] Cyclocondensations of 1,3-Bis(silyloxy)-1,3-butadienes”. |
290. | Stefan Büttner, Abdolmajid Riahi, Ibrar Hussain, Mirza A. Yawer, Mathias Lubbe, Peter Langer*, Tetrahedron 2009, 65, 2124-2135. “First Synthesis of Functionalized 5-Aryl-3-(trifluoromethyl)phenols by Regioselective [3+3] Cyclocondensations of 1,3-Bis(silyloxy)-1,3-butadienes with 3-Aryl-3-silyloxy-1-trifluoromethyl-2-en-1-ones”. |
289. | Rasheed Ahmad, Abdolmajid Riahi, Peter Langer*, Tetrahedron Lett. 2009, 50, 1490-1492. “Synthesis of Functionalized Triarylmethanes based on a ′FeCl3-Catalyzed Benzylation / [3+3] Cyclocondensation′ Strategy”. |
288. | Benard Juma, Muhammad Adeel, Alexander Villinger, Helmut Reinke, Anke Spannenberg, Christine Fischer, Peter Langer*, Adv. Synth. Catal. 2009, 351, 1073-1079. “Synthesis of 2,6-Dioxo-1,2,3,4,5,6-hexahydroindoles by Acid-Catalyzed Cyclization of Acetal-Protected (2,4-Dioxocyclohex-1-yl)acetamides and their Transformation into 5,8,9,10-Tetrahydro-6H-indolo[2,1-a]isoquinolin-9-ones”. |
287. | Farman Ullah, Tung T. Dang, Joachim Heinicke, Alexander Villinger, Peter Langer*, Synlett 2009, 838-842. “Regioselective Sonogashira Reactions of N-Methyltetrabromo-pyrrole. First Synthesis of Tri- and Tetra(1-alkynyl)pyrroles”. |
286. | Gerson Mroß, Peter Langer*, Lett. Org. Chem. 2009, 6, 189-190. “Synthesis of 4,5-Dimethoxy-o-quinone by Formal [4+2] Cyclization of 2,3-Dimethoxy-1,3-butadiene with Oxalyl Chloride”. |
285. | Stefanie Libnow, Martin Hein, Peter Langer*, Synlett 2009, 221-224. “The First N-Glycosylated Indoxyls and their Application to the Synthesis of Indirubin-N-glycosides (Purple Sugars)”. |
284. | Olumide Fatunsin, Abdolmajid Riahi, Mohanad Shkoor, Rüdiger Dede, Helmut Reinke, Peter Langer*, Synlett 2009, 201-204. “First Synthesis of Functionalized Benzonitriles by Formal [3+3] Cyclocondensations of 1,3-Bis(silyloxy)-1,3-butadienes”. |
283. | Gerson Mroß, Simone Ladzik, Helmut Reinke, Anke Spannenberg, Christine Fischer, Peter Langer*, Synthesis 2009, 2236-2248. “Synthesis of Functionalized Salicylates by Formal [3+3] Cyclocondensation of 1,3-Bis(silyloxy)-1,3-butadienes with 3-Alkoxy-2-en-1-ones”. |
282. | Asad Ali, Ihsan Ullah, Muhammad Sher, Alexander Villinger, Peter Langer*, Tetrahedron Lett. 2009, 50, 118-120. “Synthesis of Sterically Encumbered Biaryls based on a ′Copper(I)-Catalyzed Arylation / [3+3] Cyclocondensation′ Strategy”. |
281. | Abdolmajid Riahi, Mohanad Shkoor, Olumide Fatunsin, Mathias Lubbe, Helmut Reinke, Peter Langer*, Tetrahedron Lett. 2009, 50, 115-117. “First synthesis of 4-(arylsulfonyl)phenols by regioselective [3+3] cyclocondensations of 1,3-bis(silyloxy)-1,3-butadienes with 2-arylsulfonyl-3-ethoxy-2-en-1-ones”. |
280. | Sven Rotzoll, Helmut Reinke, Christine Fischer, and Peter Langer*, Synthesis 2009, 69-78. “Synthesis of Novel Halogenated 4(1H)-Quinolones by Thermolysis of Arylaminomethylene-1,3-dioxane-4,6-diones”. |
279. | Esen Bellur, Mirza A. Yawer, Ibrar Hussain, Abdolmajid Riahi, Olumide Fatunsin, Christine Fischer, Peter Langer*, Synthesis 2009, 227-242. “Synthesis of 3-Acylpyrroles, 3-(Alkoxycarbonyl)pyrroles, 6,7-Dihydro-1H-indol-4(5H)-ones and 3-Benzoylpyridines based on Staudinger-Aza-Wittig Reactions of 1,3-Dicarbonyl Compounds with 2- and 3-Azido-1,1-dialkoxyalkanes”. > > Highlighted in Synfacts 2009, 4, 374 |
278. | Stefanie Reim, Matthias Lau, Muhammad Adeel, Ibrar Hussain, Mirza A. Yawer, Abdolmajid Riahi, Zafar Ahmed, Christine Fischer, Helmut Reinke, Peter Langer*, Synthesis 2009, 445-463. „Synthesis of Biaryls, Fluorenones, Cyclopenta[def]phenanthren-4-ones and Benzophenones based on Formal [3+3] Cyclocondensations of 1,3-Bis(silyloxy)-1,3-butadienes”. |
277. | Muhammad Adeel, Muhammad A. Rashid, Nasir Rasool, Rasheed Ahmad, Alexander Villinger, Helmut Reinke, Christine Fischer, and Peter Langer*, Synthesis 2009, 243-250. “Regioselective Synthesis of Functionalized Biaryls based on the First [3+3] Cyclocondensations of 4-Aryl-1,3-bis(trimethylsilyloxy)-1,3-butadienes”. |
276. | Wolf-Diethard Pfeiffer, Horst Dollinger, Peter Langer*, Phosphorus, Sulfur, Silicon & Related Elem. 2009, 184, 626-637. “Synthesis of 5-Thioxo-hexahydrobenzo[b]thiopheno-[2,3-d]-1,2,4-triazolo[1,5-c]pyrimidines and Related Compounds based on Cyclizations of 2-Isothiocyanato-3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophene”. |
275. | Inam Iqbal, Muhammad Imran, Alexander Villinger, Peter Langer*, Synthesis 2009, 297-305. “Regioselective Synthesis of Functionalized 2-(Aryloxythio)-benzoates by the First [3+3] Cyclizations of 3-Aryloxythio-1-silyloxy-1,3-butadienes with 3-Alkoxy-2-en-1-ones”. |
2008 | |
274. | Holger Feist and Peter Langer*, Synthesis 2008, 3877-3902 (review). “One-Pot Cyclizations of (2,4-Dioxobutylidene)phosphoranes and (2-Alkoxy-4-oxo-but-2-enylidene)phosphoranes”. |
273. | Nicole Höttecke, Sven Rotzoll, Uwe Albrecht, Michael Lalk, Peter Langer*, Bioorg. Med. Chem. 2008, 16, 10319-10325. “Synthesis and Antimicrobial Activity of 2-Alkenyl-chroman-4-ones, 2-Alkenylthiochroman-4-ones and 2-Alkenylquinol-4-ones”. |
272. | Ibrar Hussain, Mirza Arfan Yawer, Michael Lalk, Ulrike Lindequist, Alexander Villinger, Christine Fischer, Peter Langer*, Bioorg. Med. Chem. 2008, 16, 9898-9903. “Hetero-Diels-Alder Reaction of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with Arylsulfonylcyanides. Synthesis and Antimicrobial Activity of 4-Hydroxy-2-(arylsulfonyl)pyridines”. |
271. | Constantin Mamat*, Helmut Reinke, Peter Langer, Anal. Sci.: X-Ray Struct. Anal. Online 2008, 24, x265. “Crystal Structure of Ethyl 6,6’-(1,2-Ethanediyl)-4,4’-bis(trifluoromethyl)-salicylate”. |
270. | Andrea Eick, Zhou Xiao, Peter Langer, Klaus Weisz*, Bioorg. Med. Chem. 2008, 16, 9106-9112. “Spectroscopic studies on the formation and thermal stability of DNA triplexes with a benzoannulated δ-carboline - oligonucleotide conjugate”. |
269. | Katrin Marie Driller, Stefanie Libnow, Martin Hein, Manuela Harms, Kristian Wende, Michael Lalk, Dirk Michalik, Helmut Reinke, Peter Langer*, Org. Biomol. Chem. 2008, 6, 4218-4223. “Synthesis of 6H-Indolo-[2,3-b]quinoxaline-N-glycosides and their Cytotoxic Activity against Human Ceratinocytes (HaCaT)”. |
268. | Mathias Lubbe, Jörg-Peter Gütlein, Helmut Reinke, Peter Langer*, Synlett 2008, 2671-2673. “Regioselective Synthesis of Polyketide-Type Phenols by the First [3+3] Cyclocondensations of 1,3-Bis(silyloxy)-1,3-butadienes with 3-Oxo-orthoesters”. |
267. | Muhammad Imran, Inam Iqbal, Nasir Rasool, Muhammad A. Rashid, Peter Langer*, Synlett 2008, 2708-2710. “Regioselective Synthesis of 2-Thiophenoxybenzoates by the First Catalytic [3+3] Cyclocondensations of 1-Trimethylsilyloxy-3-thiophenoxy-1,3-butadienes with 1,1,3,3-Tetramethoxypropane”. |
266. | Muhammad Adeel, Stefanie Reim, Verena Wolf, Mirza A. Yawer, Ibrar Hussain, Alexander Villinger, Peter Langer*, Synlett 2008, 2629-2632. “Synthesis and Reactions of the First Fluorine-Containing 1,3-Bis(trimethylsilyloxy)-1,3-butadienes”. |
265. | Matthias Lau, Peter Langer*, Tetrahedron Lett. 2008, 49, 5618-5619. “Synthesis of 5-(2-Aryl-2-haloethyl)salicylates by the First Domino [3+3] Cyclization / Ring-Cleavage Reactions of 1,3-Bis(silyloxy)-1,3-butadienes with 3-Acetyl-5-aryl-4,5-dihydrofurans”. |
264. | Thomas Rahn, T. H. Tam Dang, Anke Spannenberg, Christine Fischer, Peter Langer*, Org. Biomol. Chem. 2008, 6, 3366-3370. “Regioselective Synthesis of Functionalized 3,5-Diketoesters and 2,4-Diketosulfones by Uncatalyzed Condensation of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with α,β-Unsaturated Acid Chlorides and Sulfonyl Chlorides”. |
263. | Muhammad Sher, Asad Ali, Helmut Reinke, Peter Langer*, Tetrahedron Lett. 2008, 49, 5400-5402. “Synthesis of 3-Aryl-3,4-dihydroisocoumarins by Regioselective Domino ′[3+3] Cyclization / Lactonization′ Reactions of 1,3-Bis(silyloxy)-1,3-butadienes with 1-Hydroxy-5-silyloxy-4-en-3-ones”. |
262. | Tung T. Dang, Alexander Villinger, Peter Langer*, Adv. Synth. Catal. 2008, 350, 2109-2117. “Efficient Synthesis of Substituted Selenophenes based on the First Palladium(0)-Catalyzed Cross-Coupling Reactions of Tetrabromoselenophene”. |
261. | Stefan Büttner, Mathias Lubbe, Helmut Reinke, Christine Fischer, Peter Langer*, Tetrahedron 2008, 64, 7968-7976. “First Synthesis of 5-Alkyl- and 5-Aryl-3-(perfluoroalkyl)phenols by [3+3] Cyclocondensation of 1,3-Bis(silyloxy)-1,3-butadienes with 3-Silyloxy-1-(perfluoroalkyl)prop-2-en-1-ones”. |
260. | Stefanie Reim, Dirk Michalik*, Klaus Weisz, Zhou Xiao, Peter Langer*, Org. Biomol. Chem. 2008, 6, 3079-3084. “Synthesis and Solution Structure of 3,5-Dioxopimelic Acid Diesters – Stable 1,3,5,7-Tetracarbonyl Derivatives”. |
259. | Mathias Lubbe, Renske Klassen, Tiana Trabhardt, Alexander Villinger, Peter Langer*, Synlett 2008, 2331-2333. “Regioselective Synthesis of Functionalized 3-(Methylthio)phenols by Formal [3+3] Cyclizations of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with 1,1-Bis(methylthio)-1-en-3-ones”. |
258. | Ibrar Hussain, Mirza A. Yawer, Bettina Appel, Muhammad Sher, Ahmed Mahal, Alexander Villinger, Peter Langer*, Tetrahedron 2008, 64, 8003-8009. “Synthesis of 4-Hydroxy- and 2,4-Dihydroxy-homophthalates by [4+2] Cycloaddition of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with Dimethyl Allene-1,3-dicarboxylate”. |
257. | Stefanie Reim, Ibrar Hussain, Muhammad Adeel, Mirza A. Yawer, Alexander Villinger, Peter Langer*, Tetrahedron Lett. 2008, 49, 4901-4904. “Synthesis and Reactions of the First 2-Chloro-1,3-bis(trimethylsilyloxy)-1,3-butadienes”. |
256. | Ibrar Hussain, Abdolmajid Riahi, Mirza Arfan Yawer, Helmar Görls, Peter Langer*, Org. Biomol. Chem. 2008, 6, 3542-3551. “One-Pot Synthesis of 6-(Thien-2-yl)- and 6-(Fur-2-yl)salicylates based on Regioselective [3+3] Cyclizations of 1,3-Bis(trimethyl-silyloxy)-1,3-butadienes”. |
255. | Mirza A. Yawer, Ibrar Hussain, Andreas Schmidt, Jörg-Peter Gütlein, Haijun Jiao, Helmut Reinke, Anke Spannenberg, Peter Langer* Eur. J.Org. Chem. 2008, 4193-4199. “Synthesis of Functionalized Isobenzomorphans by Two-Step Cyclocondensation of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with Isoquinolines”. |
254. | Mathias Lubbe, Constantin Mamat, Peter Langer*, Synlett 2008, 1684-1686. “Regioselective Synthesis of Rare 3-(Halomethyl)phenols based on Formal [3+3] Cyclizations of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes”. |
253. | Andreas Schmidt, Dirk Michalik*, Ehsan Ullah, Sven Rotzoll, Christine Fischer, Helmut Reinke, Peter Langer*, Org. Biomol. Chem. 2008, 6, 2804-2814. “Synthesis of Azoxabicyclo[3.3.1]nonanones based on Reactions of 1,1-Bis(trimethylsilyloxy)ketene Acetals with Isoquinolines and Quinolines”. |
252. | Mathias Lubbe, Alina Bunescu, Alexander Villinger, Peter Langer*, Synlett 2008, 1862-1864. “Synthesis of 4-Methoxy-6-(trifluoromethyl)salicylates by [3+3] Cyclocondensations of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with 1,1-Dimethoxy-4,4,4-trifluorobut-1-en-3-one”. |
251. | Mirza A. Yawer, Ibrar Hussain, Inam Iqbal, Anke Spannenberg, Peter Langer*, Tetrahedron Lett. 2008, 49, 4467-4469. “Synthesis of Functionalized Dibenzo[b,d]pyrid-6-ones based on a [3+3]-Cyclocondensation / Lactamization Strategy”. |
250. | Jennifer Hefner, Peter Langer*, Tetrahedron Lett. 2008, 49, 4470-4472. “Chelation Control in the [3+3] Annulation Reactions of Alkoxy-Substituted 1,1-Diacylcyclopropanes with 1,3-Bis(trimethylsilyloxy)-1,3-butadienes”. |
249. | Vahuni Karapetyan, Satenik Mkrtchyan, Tung T. Dang, Helmut Reinke, Peter Langer*, Tetrahedron 2008, 64, 8010-8015. “Regioselective Synthesis of 6-Halomethyl-5,6-dihydro-4H-1,2-oxazines based on Iodine-mediated Cyclizations of Arylalkenyl-oximes”. |
248. | Vahuni Karapetyan, Satenik Mkrtchyan, Andreas Schmidt, Jörg-Peter Gütlein, Alexander Villinger, Helmut Reinke, Haijun Jiao, Christine Fischer, and Peter Langer*, Org. Biomol. Chem. 2008, 2961-2968. “Synthesis of 7,8-Benzo-4-hydroxy-1,9-diazabicyclo[3.3.1]non-3-enes by Cyclization of 1,3-Bis(Silyl Enol Ethers) with Quinazolines”. |
247. | Peter Langer,* Shadi Amiri, Anja Bodtke, Nehad N. R. Saleh, Klaus Weisz, Helmar Görls, Peter R. Schreiner*, J. Org. Chem. 2008, 73, 5048-5063. “3,5,7,9-Substituted Hexaazaacridines – Toward Structures with Nearly Degenerate Singlet-Triplet Energy Separations”. |
246. | Stefanie Libnow, Karen Methling, Martin Hein, Dirk Michalik, Manuela Harms, Kristian Wende, Anke Flemming, Martin Köckerling, Helmut Reinke, Patrick J. Bednarski, Michael Lalk, and Peter Langer* Bioorg. Med. Chem. 2008, 16, 5570-5583. “Synthesis of Indirubin-N-glycosides and their Anti-Proliferative Activity against Human Cancer Cell Lines”. |
245. | Vahuni Karapetyan, Satenik Mkrtchyan, Andreas Schmidt, Orazio A. Attanasi, Gianfranco Favi, Fabio Mantellini, Alexander Villinger, Christine Fischer, Peter Langer*, Adv. Synth. Catal. 2008, 350, 1331-1336. “Diversity-Oriented Synthesis of Functionalized 1-Aminopyrroles by Regioselective ZnCl2-Catalyzed One-Pot ¢Conjugate Addition/Cyclization¢ Reactions of 1,3-Bis(silyl enol ethers) with 1,2-Diaza-1,3-butadienes”. |
244. | Muhammad A. Rashid, Nasir Rasool, Bettina Appel, Muhammad Adeel, Vahuni Karapetyan, Satenik Mkrtchyan, Helmut Reinke, Christine Fischer, Peter Langer*, Tetrahedron 2008, 64, 5416-5425. “Synthesis of 1-Azaxanthones by Condensation of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with 3-(Cyano)benzopyrylium Triflates and Subsequent Domino Retro-Michael / Nitrile-Addition / Heterocyclization¢ Reaction”. |
243. | Muhammad A. Rashid, Nasir Rasool, Muhammad Adeel, Helmut Reinke, Christine Fischer, Peter Langer*, Tetrahedron 2008, 64, 3782-3793. “Synthesis of Functionalized Diarylsulfides based on Regioselective One-Pot Cyclizations of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes”. |
242. | Jennifer Hefner, Peter Langer*, Tetrahedron Lett. 2008, 49, 2262-2264. “Synthesis of Sterically Encumbered and Functionalized Diaryl-diazenes by Formal [3+3] Cyclization of 2-Aryl-diazenyl-3-silyloxy-2-en-1-ones with 1,3-Bis(silyloxy)-1,3-butadienes”. |
241. | Nasir Rasool, Muhammad A. Rashid, Muhammad Adeel, Helmar Görls, Peter Langer*, Tetrahedron Lett. 2008, 49, 2254-2257. “Synthesis and Reactions of Hydroxyspiro[5.2]cyclooctenones based on the Cyclization of the Dianions of Acetone and Diethyl 2-Oxopropylphosphonate with 1,1-Diacylcyclopropanes”. |
240. | Muhammad A. Rashid, Nasir Rasool, Inam Iqbal, Imran Iqbal, Peter Langer*, Tetrahedron Lett. 2008, 49, 2466-2468. “Regioselective Synthesis of Functionalized 2-(Phenylthio)benzoates by ′[3+3] Cyclization / Homo-Michael′ Reactions of 1-Methoxy-1-trimethylsilyloxy-3-phenylthio-1,3-butadienes with 1,1-Diacylcyclopropanes”. |
239. | Stefanie Reim, Peter Langer*, Tetrahedron Lett. 2008, 49, 2329-2332. “The First 4-Chloro-1,3-bis(trimethylsilyloxy)-1,3-diene and its Application to the Regioselective Synthesis of Chlorinated Arenes”. |
238. | Peter Langer*, Chimica Oggi/Chemistry Today 2008, 26 n 1, 9. “2-Vinylchroman-4-ones as Potent Antibiotic Agents”. |
237. | Gerson Mroß, Helmut Reinke, Peter Langer*, Synlett 2008, 963-966. “Synthesis of Functionalized Biaryls based on a ′Heck Cross-Coupling / [3+3] Cyclization′ Strategy”. |
236. | Muhammad Sher, Peter Langer*, Synlett 2008, 1050-1053. “Regioselective synthesis of functionalized resorcins by cyclization of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3,3-dimethoxypentanoyl chloride”. |
235. | Mirza A. Yawer, Abdolmajid Riahi, Muhammad Adeel, Ibrar Hussain, Christine Fischer, Peter Langer*, Synthesis 2008, 1276-1282. “One-pot synthesis of 6-(pyridyl)salicylates by formal [3+3] cyclizations of 1,3-bis(silyl enol ethers) with 3-pyridyl-3-silyloxy-2-en-1-ones”. |
234. | Benard Juma, Muhammad Adeel, Alexander Villinger, Peter Langer*, Tetrahedron Lett. 2008, 49, 2272-2274. “Efficient synthesis of 2,6-dioxo-1,2,3,4,5,6-hexahydroindoles based on the synthesis and reactions of (2,4-dioxocyclohex-1-yl)acetic acid derivatives”. |
233. | Nasir Rasool, Muhammad A. Rashid, Helmut Reinke, Christine Fischer, Peter Langer*, Tetrahedron 2008, 64, 3246-3252. “Synthesis and Reactions of Functionalized Spirocyclo-propanes by Cyclization of Dilithiated β-Ketosulfones, α-Cyanoacetone and Diethyl 2-Oxopropylphosphonate with 1,1-Diacetylcyclopropane”. |
232. | Tung T. Dang, Tuan T. Dang, Rasheed Ahmad, Helmut Reinke, Peter Langer*, Tetrahedron Lett. 2008, 49, 1698-1700. “Regioselective Synthesis of Functionalized Pyrroles based on the first Palladium(0)-Catalyzed Cross-Coupling Reactions of N-Methyltetrabromopyrrole”. |
231. | Thomas Rahn, Haijun Jiao, Wolfgang Baumann, Anke Spannenberg, Peter Langer*, Eur. J. Org. Chem. 2008, 971-974. “Synthesis and characterization of cyclopropyl-polyketides. A combined experimental and theoretical study”. |
230. | Tung T. Dang, Tuan T. Dang, Helmut Reinke, Christine Fischer, Peter Langer*, Tetrahedron 2008, 64, 2207-2215. “Synthesis of Pyrazole-5-carboxylates and Pyrazole-1,5-Dicarboxylates by One-Pot Cyclization of Hydrazone Dianions with Diethyl Oxalate”. |
229. | Sven Rotzoll, Helmut Reinke, Peter Langer*, Tetrahedron Lett. 2008, 49, 675-677. “Synthesis of Heterospiranes by Cyclization of Dinucleophiles with 1,1-Bis(tosyloxymethyl)cyclopropane and –cyclobutane”. |
228. | Muhammad A. Rashid, Nasir Rasool, Muhammad Adeel, Christine Fischer, Helmut Reinke, Anke Spannenberg, Peter Langer*, Tetrahedron 2008, 64, 529-535. “Regioselective Synthesis of Diaryl Ethers based on One-Pot Cyclizations of 4-Aryloxy-1,3-bis(trimethylsilyloxy)-1,3-dienes”. |
227. | Stefanie Libnow, Martin Hein, Peter Langer*, Tetrahedron Lett. 2008, 49, 289-291. “First synthesis of oxaanalogous isoindigo-N-glycosides”. |
226. | Sven Rotzoll, Peter Langer*, Synthesis 2008, 45-52. “Regioselective Synthesis of Oxepin- and Oxocin-Annulated Quinolines by Combined ′Claisen-Rearrangement / Olefin-Metathesis′ Reactions”. |
225. | Ibrar Hussain, Mirza A. Yawer, Matthias Lau, Thomas Pundt, Christine Fischer, Helmut Reinke, Helmar Görls, Peter Langer*, Eur. J. Org. Chem. 2008, 503-518. “Regioselective Synthesis of Fluorinated Phenols, Biaryls, 6H-Benzo[c]chromen-6-ones and Fluorenones based on Formal [3+3] Cyclizations of 1,3-Bis(Silyl Enol Ethers)”. |
224. | Mirza A. Yawer, Ibrar Hussain, Christine Fischer, Helmar Görls, Peter Langer*, Tetrahedron 2008, 64, 894-900 (Symposium-in-Print). “Synthesis of 2-Benzoyl-4-(2-hydroxybenzoyl)phenols by Catalytic Domino ′Michael-Retro-Michael-Mukaiyama-Aldol′ Reactions of 1-Aryl-1,3-bis(silyloxy)buta-1,3-dienes with 3-Formylchromones”. |
223. | Constantin Mamat, Thomas Pundt, T. H. Tam Dang, Renske Klassen, Helmut Reinke, Martin Köckerling, Peter Langer*, Eur. J. Org. Chem. 2008, 492-502. “One Pot Synthesis of Functionalized 3-(Trifluoromethyl)phenols by Formal [3+3] Cyclization of 1,3-Bis(silyl enol ethers) with α,β-Unsaturated Trifluoromethylketones”. |
2007 | |
222. | Andreas Schmidt, Vahuni Karapetyan, Orazio A. Attanasi, Gianfranco Favi, Helmar Görls, Fabio Mantellini, Peter Langer,* Synlett 2007, 2965-2968. “Regioselective Synthesis of New 1-Aminopyrroles and 1-Amino-4,5,6,7-tetrahydroindoles by one-pot conjugate addition / cyclization reactions of 1,3-bis(silyl enol ethers) with 1,2-diaza-1,3-butadienes”. |
221. | Van T. H. Nguyen, Joachim T. Anders, Qingjun Ma, Regine Herbst-Irmer, Peter Langer*, Tetrahedron 2007, 63, 12975-12985. “Synthesis of Functionalized Pyran-4-ones based on Ring Transformations of 5-Alkylidene-2,5-dihydro-pyrrol-2-ones”. |
220. | Rüdiger Dede, Lars Michaelis, Dilver Fuentes, Mirza A. Yawer, Ibrar Hussain, Christine Fischer, Peter Langer*, Tetrahedron 2007, 63, 12547-12561. “Synthesis of 4-Alkoxycarbonyl-butenolides by Uncatalyzed One-Pot Cyclization of 1,3-Bis(silyloxy)alk-1-enes with Oxalyl Chloride”. |
219. | Mirza Arfan Yawer, Ibrar Hussain, Stefanie Reim, Zafar Ahmed, Ehsan Ullah, Inam Iqbal, Christine Fischer, Helmut Reinke, Helmar Görls, and Peter Langer*, Tetrahedron 2007, 63, 12562-12575. “Regioselective Synthesis of 4-Chlorophenols, 10-Chloro-7-hydroxy-6H-benzo[c]chromen-6-ones and 4-Chloro-1-hydroxy-9H-fluoren-9-ones based on [3+3] Cyclizations of 1,3-Bis(silyloxy)-1,3-dienes with 2-Chloro-3-silyloxy-2-en-1-ones”. |
218. | Muhammad Sher, Helmut Reinke, Peter Langer*, Tetrahedron Lett. 2007, 48, 7923-7925. “Regioselective synthesis of 1-(2,2-dimethoxyethyl)-1,2,3-triazoles by copper(I)-catalyzed [3+2] cyclization of 2-azido-1,1-dimethoxyethane with alkynes”. |
217. | Nasir Rasool, Muhammad A. Rashid, Helmut Reinke, Christine Fischer, Peter Langer*, Tetrahedron 2007, 63, 11626-11635. “Regioselective Synthesis of ω-Bromo-3-ketosulfones, ω-Bromo-3-ketonitriles, and 2-(ω-Bromoalkyl)benzofurans based on a ′Ring-Closing / Ring-Opening′ Strategy”. |
216. | Anja Bodtke, Wolf-Diethard Pfeiffer, Helmar Görls, Horst Dollinger, Peter Langer,* Tetrahedron 2007, 63, 11287-11298. “Sequential Cyclizations of 2-Isothiocyanatobenzonitrile (ITCB) and 2-Isocyanatobenzonitrile (ICB) with α-Aminoketones: Synthesis of 5-Thioxo-6H-imidazo[1,2-c]quinazolines and Related Compounds”. > > Highlighted in Synfacts 2008, 01, 0017 |
215. | Esen Bellur, Holger Feist, Peter Langer*, Tetrahedron 2007, 63, 10865-10888 (review). “Recent Advances in the Chemistry of 2-(2-Oxoalkylidene)tetrahydrofurans”. |
214. | Muhammad Sher, Zafar Ahmed, Muhammad A. Rashid, Christine Fischer, Peter Langer*, J. Org. Chem. 2007, 72, 6284-6286. “First Catalytic [3+3] Cyclizations of 1,3-Bis(Silyl Enol Ethers)”. > > Highlighted in Organic Chemistry Portal (http://www.organic-chemistry.org/) |
213. | Constantin Mamat, Stefan Büttner, Tiana Trabhardt, Christine Fischer, Peter Langer*, J. Org. Chem. 2007, 72, 6273-6275. “Synthesis of 5-Alkylsalicylates, 5-Alkyl-2-hydroxyacetophenones, and 5-Alkyl-2-hydroxybenzophenones by formal [3+3] Cyclization of 1,3-Bis(Silyl Enol Ethers) with 2-Alkyl-1,1,3,3-tetraethoxypropanes”. |
212. | Ibrar Hussain, Van Thi Hong Nguyen, Mirza Arfan Yawer, Tuan Thanh Dang, Christine Fischer, Helmut Reinke, Peter Langer*, J. Org. Chem. 2007, 72, 6255-6258. “Synthesis of Dibenzo[b,d]pyran-6-ones based on [3+3] Cyclizations of 1,3-Bis(Silyl Enol Ethers) with 3-Silyloxy-2-en-1-ones”. |
211. | Peter Langer* in Electronic Encyclopedia of Reagents for Organic Synthesis (Ed.: L. A. Paquette), Wiley, New York, 2007, pp. 1-6. “2-Azido-1,1-dimethoxyethane”. |
210. | Van T. H. Nguyen, Esen Bellur, Christine Fischer, Peter Langer*, Tetrahedron 2007, 63, 8037-8045. “Synthesis of 2,5-Dihydrobenzo[b]oxepines and 5,6-Dihydro-2H-benzo[b]oxocines based on [3+3] Cyclizations of 1,3-Bis(Silyl Enol Ethers)”. |
209. | Muhammad Sher, Zafar Ahmed, Muhammad A. Rashid, Christine Fischer, Anke Spannenberg, Peter Langer*, Tetrahedron 2007, 63, 4929-4936. “Synthesis of Diaryl Ethers based on One-Pot [3+3] Cyclizations of 1,3-Bis(Silyl Enol Ethers)”. |
208. | Uwe Albrecht, Peter Langer*, Tetrahedron 2007, 63, 4648-4654. “Synthesis of Spirocyclic Butenolides by Ring Closing Metathesis”. |
207. | Edith Holtz, Uwe Albrecht, Peter Langer*, Tetrahedron 2007, 63, 3293-3301. “One-Pot Reactions of 2,4-(Dioxobutylidene)phosphoranes. Efficient Synthesis of 4-(2-Hydroxybenzoyl)salicylic Acid Derivatives and Buta-1,3-diene-1,4-dicarboxylates”. |
206. | Andreas Schmidt, Jörg-Peter Gütlein, Satenik Mkrtchyan, Helmar Görls, Peter Langer*, Synlett 2007, 1305-1307. “Synthesis of 7,8-Benzo-4-hydroxy-1,9-diazabicyclo[3.3.1]non-4-enes by Cyclization of 1,3-Bis(Silyl Enol Ethers) with Quinazolines”. |
205. | Muhammad Sher, Helmut Reinke, Peter Langer*, Tetrahedron 2007, 63, 4080-4086. “Synthesis of 4,5-Diaryl-1,2,3-benzenetricarboxylates by Reaction of 4-Hydroxycyclopent-2-en-1-one-2-carboxylates with Dimethyl Acetylenedicarboxylate”. |
204. | Nguyen Van Duy, Carmen Wolf, Ulrike Mäder, Michael Lalk, Peter Langer, Ulrike Lindequist, Michael Hecker, Haike Antelmann*, Proteomics 2007, 7, 1391-1408. “Transcriptome and proteome analyses in response to 2-methylhydroquinone and 6-brom-2-vinyl-chroman-4-on reveal different degradation systems involved in the catabolism of aromatic compounds in Bacillus subtilis”. |
203. | Thomas Pundt, Matthias Lau, Ibrar Hussain, Mirza, A. Yawer, Helmut Reinke, Peter Langer*, Tetrahedron Lett. 2007, 48, 2745-2747. “One-Pot Synthesis of Aryl Fluorides by [3+3] Cyclization of 1,3-Bis(Silyl Enol Ethers) with 2-Fluoro-3-silyloxy-2-en-1-ones”. |
202. | Muhammad A. Rashid, Helmut Reinke, Peter Langer*, Tetrahedron Lett. 2007, 48, 2321-2323. “Regioselective Synthesis of Diaryl Sulfides by [3+3] Cyclizations of 1,3-Bis(Silyl Enol Ethers)”. |
201. | Andreas Schmidt, Jörg-Peter Gütlein, Peter Langer*, Tetrahedron Lett. 2007, 48, 2067-2069. “Synthesis of 6-Alkylidene-2,3-benzo-1,4-diaza-7-oxabicyclo[4.3.0]non-2-enes by Cyclization of 1,3-Bis(silyl enol ethers) with Quinoxalines”. |
200. | Sven Rotzoll, Ehsan Ullah, Helmar Görls, Peter Langer*, Tetrahedron 2007, 63, 2647-2656. “One-Pot Synthesis of 3-Hydroxymaleic Anhydrides by Cyclization of 1,1-Bis(trimethylsilyloxy)ketene Acetals with Oxalyl Chloride”. |
199. | Peter Langer*, Eur. J. Org. Chem. 2007, 2233-2238. “Synthesis of Bridged and Non-Bridged N-Heterocycles by Cyclocondensation of Bis(silyl enol ethers) with Iminium Salts” (Microreview). |
198. | Tuan Thanh Dang, Tung Thanh Dang, Peter Langer*, Tetrahedron Lett. 2007, 48, 3591-3593. “One-Pot Synthesis of Pyrazole-5-carboxylates by Cyclization of Hydrazone 1,4-Dianions with Diethyl Oxalate”. > > Highlighted in Synfacts 2007, 07, 0692 |
197. | Thomas Rahn, Van T. H. Nguyen, T. H. Tam Dang, Zafar Ahmed, Michael Lalk, Christine Fischer, Anke Spannenberg, Peter Langer*, J. Org. Chem. 2007, 72, 1957-1961. “Synthesis of 1,3,5-Tricarbonyl Derivatives by Condensation of 1,3-Bis(Silyl Enol Ethers) with Carboxylic Acid Chlorides”. > > Highlighted in Organic Chemistry Portal (http://www.organic-chemistry.org/) |
196. | Peter Langer*, Synlett 2007, 1016-1025. “Domino Reactions of 1,3-Bis(Silyl Enol Ethers) with 4-(Trialkylsilyloxy)benzopyrylium Triflates” (account article). |
195. | Tuan Thanh Dang, Nasir Rasool, Tung Thanh Dang, Helmut Reinke, Peter Langer*, Tetrahedron Lett. 2007, 48, 845-847. “Synthesis of Tetraarylthiophenes by Regioselective Suzuki Cross-Coupling Reactions of Tetrabromothiophene”. |
194. | Edith Holtz, Peter Langer*, Synth. Commun. 2007, 37, 2959-2966. “Synthesis of 5-Cyano-1,3-dioxoalkanes by Reaction of 1,3-Dicarbonyl Dianions with Bromoacetonitrile”. |
193. | Iyad Karamé,* Esen Bellur, Sven Rotzoll, Peter Langer, Christine Fischer, Jens Holz, Armin Börner*, Synth. Commun. 2007, 37, 1067-1076. “Highly Enantioselective Hydrogenation of β-Alkyl and β-(ω-Chloroalkyl) Substituted β-Keto Esters”. |
192. | Anja Bodtke, Madeleine Kandt, Wolf-Diethard Pfeiffer, Peter Langer*, Phosphorus, Sulfur, Silicon & Related Elem. 2007, 182, 209-217. “Synthesis of 4-Aryl-2-imino-2H-selenazolines by Cyclization of Amines with α-(Selenocyanato)acetophenones”. |
191. | Ilia Freifeld, Gopal Bose, Tobias Eckardt, Peter Langer*, Eur. J. Org. Chem. 2007, 351-355. “Synthesis of γ-(4-Oxobut-2-en-1-ylidene)butenolides and γ-(2-Oxobut-3-en-1-ylidene)butenolides based on [3+2] Cyclization of 1,5-Bis(trimethylsilyloxy)-1,3,5-hexatrienes and 2,4-Bis(trimethylsilyloxy)-1,3,5-hexatrienes with Oxalyl Chloride”. |
190. | Holger Feist, Peter Langer*, Synthesis 2007, 327-347 (invited review). “One-Pot Synthesis of Functionalized Carbacycles by Formal [3+3] Cyclizations of 1,3-Bis(silyl enol ethers) with 1,3-Dielectrophiles”. |
189. | Mathias Lubbe, Constantin Mamat, Christine Fischer, Peter Langer*, Tetrahedron 2007, 63, 413-418. “Synthesis of 6-(Perfluoroalkyl)salicylates by [3+3] Cyclization of 1,3-Bis(Silyl Enol Ethers) with 3-Ethoxy-1-(perfluoroalkyl)prop-2-en-1-ones”. |
2006 | |
188. | Peter Langer*, Synlett 2006, 3369-3381 (account article). “Synthesis of Butenolides by One-Pot Cyclizations of Silyl Enol Ethers with Oxalyl Chloride”. |
187. | Sven Rotzoll, Ehsan Ullah, Christine Fischer, Dirk Michalik, Anke Spannenberg, Peter Langer*, Tetrahedron 2006, 62, 12084-12091. “Synthesis of 1,4-Diaza-7-oxabicyclo[4.3.0]non-2-en-6-ones by Cyclization of 1,1-Bis(trimethylsiloxy)ketene Acetals with Pyrazine and Quinoxaline”. |
186. | Zafar Ahmed, Peter Langer*, Synlett 2006, 3361-3363. “Synthesis of Functionalized Diaryl Ethers by [3+3] Cyclization of 1,3-Bis(Silyl Enol Ethers) with 2-Aryloxy-3-(silyloxy)alk-2-en-1-ones”. |
185. | Gerson Mroß, Peter Langer*, Tetrahedron Lett. 2006, 47, 8519-8521. “Synthesis of Functionalized Arylalkyl and Diaryl Ethers by [3+3] Cyclization of 3-Alkoxy- and 3-Aryloxy-1-siloxy-1,3-butadienes with 3-(Silyloxy)alk-2-en-1-ones”. |
184. | Mathias Lubbe, Bettina Appel, Anke Flemming, Christine Fischer, Peter Langer*, Tetrahedron 2006, 62, 11755-11759. “Synthesis of 7-Hydroxy-2-(2-hydroxybenzoyl)benzo[c]chromen-6-ones by Sequential Application of Domino Reactions of 1,3-Bis(Silyl Enol Ethers) with Benzopyrylium Triflates”. |
183. | Tuan T. Dang, Tung T. Dang, Peter Langer*, Synlett 2006, 2812-2814. “Synthesis of 2-(2-Arylethenyl)-5-arylfurans by Regioselective Palladium(0)-Catalyzed Coupling Reactions of 2-(2-Bromo-2-nitroethenyl)-5-bromofuran”. |
182. | Gerson Mroß, Edith Holtz, Peter Langer*, J. Org. Chem. 2006, 71, 8045-8049. “Synthesis of Functionalized Furans based on Feist-Benary-Cyclization of (2,4-Dioxobutylidene)phosphoranes with α-Haloketones and α-Chloracetaldehyde”. > > Highlighted in Synfacts 2007, 01, 0030 |
181. | Stefanie Reim, Matthias Lau, Peter Langer*, Tetrahedron Lett. 2006, 47, 6903-6905. “Synthesis of Fluorenones based on a ′[3+3] Cyclization / Suzuki Cross-Coupling / Friedel-Crafts-Acylation′ Strategy”. |
180. | Stefanie Reim, Mathias Lubbe, Peter Langer*, Tetrahedron Lett. 2006, 47, 6751-6752. “Synthesis of Phthalates and Isophthalates by [3+3] Cyclizations of 1,3-Bis(Silyl Enol Ethers) with 3-(Silyloxy)alk-2-en-1-ones”. |
179. | Ehsan Ullah, Bettina Appel, Christine Fischer, Peter Langer*, Tetrahedron 2006, 62, 9694-9700. “Synthesis of 7-Hydroxy-6H-benzo[c]chromen-6-ones based on a ′[3+3] Cyclization / Domino Retro-Michael-Aldol-Lactonization′ Strategy”. |
178. | Stefanie Libnow, Martin Hein*, Dirk Michalik, Peter Langer*, Tetrahedron Lett. 2006, 47, 6907-6909. “First Synthesis of Indirubin N-Glycosides (Red Sugars)”. |
177. | Ilia Freifeld, Heydar Shojaei, Rüdiger Dede, Peter Langer*, J. Org. Chem. 2006, 71, 6165-6170. “Domino ′Staudinger / Semi-Aza-Wittig / Fragmentation′ Reactions of γ-Azido-β-hydroxyketones”. |
176. | Martin Hein*, Thi Bich Phuong Nguyen, Dirk Michalik, Helmar Görls, Michael Lalk, Peter Langer*, Tetrahedron Lett. 2006, 47, 5741-5745. “Synthesis of the first Deprotected Indigo N-glycosides (Blue Sugars) by Reductive Glycosylation of Dehydroindigo”. |
175. | Van Thi Hong Nguyen, Bettina Appel, Peter Langer*, Tetrahedron 2006, 62, 7674-7686. “Synthesis of Chromanes by Double-Annulation Reactions of 1,3-Bis(trimethylsilyloxy)-7-chlorohepta-1,3-dienes”. |
174. | Anja Bodtke, Helmut Reinke, Dirk Michalik, Peter Langer*, Tetrahedron 2006, 62, 7653-7660. “Synthesis of 2-Oxo-2,3,5,6-tetrahydro-5-thioxoimidazo[1,2-c]quinazolines by One-Pot Cyclization of α-Aminocarboxylic Esters with 2-(Isothiocyanato)benzonitrile (ITCB)”. |
173. | Uwe Albrecht, Helmut Reinke, Peter Langer*, Synthesis 2006, 3067-3074. “One-Pot Cyclization of Carbon Nucleophiles with 2-(Isothiocyanato)benzonitrile (ITCB). Synthesis of 2-Alkylidene-3,4-dihydro-4-thioxo-2(1H)quinazolines”. |
172. | Van Thi Hong Nguyen, Esen Bellur, Bettina Appel, Peter Langer*, Synthesis 2006, 2865-2872. “Synthesis of 4-Alkyl- and 4-(ω-Chloroalkyl)-3-hydroxy-5-alkylidenebutenolides based on Cyclizations of 4-Alkyl- and 4-(ω-Chloroalkyl)-1,3-bis(trimethylsilyloxy)buta-1,3-dienes with Oxalyl Chloride”. |
171. | Ilia Freifeld, Heydar Shojaei, Peter Langer*, J. Org. Chem. 2006, 71, 4965-4968. “Synthesis of 2-Alkylidenepyrrolidines and Pyrroles by Condensation of 1,3-Dicarbonyl Dianions with a-Azidoketones and subsequent Intramolecular Staudinger-Aza-Wittig-Reaction”. |
170. | Ilia Freifeld, Edith Holtz, Georg Dahmann, Peter Langer*, Eur. J. Org. Chem. 2006, 3251-3258. “Diversity-Oriented Synthesis of 2,5-Disubstituted Tetrahydrofurans based on a 'Cyclization-Hydrogenation-Substitution' Strategy”. |
169. | Esen Bellur, Ilia Freifeld, Dominique Böttcher, Uwe Bornscheuer, Peter Langer*, Tetrahedron 2006, 62, 7132-7139. “Synthesis of (Tetrahydrofuran-2-yl)acetates based on a ′Cyclization / Hydrogenation / Enzymatic Kinetic Resolution′ Strategy”. |
168. | Thomas Emmrich, Helmut Reinke and Peter Langer*, Synthesis 2006, 2551-2555. “Synthesis of 4-Hydroxy-2-(arylsulfonyl)pyridines by Hetero-Diels-Alder Reaction of 1,3-Bis-Silyl Enol Ethers with Arylsulfonylcyanides”. |
167. | Zafar Ahmed, Christine Fischer, Anke Spannenberg, Peter Langer*, Tetrahedron 2006, 62, 4800-4806. “Synthesis of Functionalized p-Dihydrobenzoquinones and p-Benzoquinones based on [3+3] Cyclizations of 1,3-Bis-Silyl Enol Ethers”. |
166. | Uwe Albrecht, Ilia Freifeld, Helmut Reinke, Peter Langer*, Tetrahedron 2006, 62, 5775-5786. “One-Pot Cyclization of Dilithiated Nitriles with Isothiocyanates and Epibromohydrin. Synthesis of 2-Cyano-1-(hydroxymethyl)cyclopropanes and 2-Cyanomethylidene-4-(hydroxymethyl)thiazolidines”. |
165. | Falko Helmholz, Rita Schroeder, Peter Langer*, Synthesis 2006, 2507-2514. “Synthesis of Unsymmetrical Pyrrolo[3,2-b]pyrrole-2,5-diones and Bis(quinazolin-4-on-2-yls) by Double-Anion-Capture-Reactions of Unsymmetrical Oxaldi(arylimidoyl) dichlorides”. |
164. | Bettina Appel, Sven Rotzoll, Helmut Reinke and Peter Langer* Eur. J. Org. Chem. 2006, 3638-3644. “Domino ′Michael-Retro-Michael-Mukaiyama-Aldol′ Reactions of 1,3-Bis-Silyl Enol Ethers with 3-Acyl- and 3-Formylbenzopyrylium Triflates. Synthesis of Functionalized 2,4-Dihydroxybenzophenones”. |
163. | Gopal Bose, Karin Bracht, Patrick J. Bednarski, Michael Lalk*, Peter Langer*, Bioorg. Med. Chem. 2006, 14, 4694-4703. “Synthesis, Reactions and Structure-Activity Relationships of 1-Hydroxyspiro[2.5]cyclooct-4-en-3-ones. Illudin Analogs with in vitro Cytotoxic Activity”. |
162. | Tuan Thanh Dang, Uwe Albrecht, Peter Langer*, Synthesis 2006, 2515-2522. “Synthesis of Isoxazole-5-carboxylates by Cyclization of Oxime 1,4-Dianions with Diethyl Oxalate”. |
161. | Esen Bellur, Peter Langer*, Tetrahedron Lett. 2006, 47, 2151-2154. “Synthesis of Functionalized Pyrroles and 6,7-Dihydro-1H-indol-4(5H)-ones by Reaction of 1,3-Dicarbonyl Compounds with 1-Azido-2,2-diethoxyethane”. |
160. | Esen Bellur, Dominique Böttcher, Uwe Bornscheuer*, Peter Langer*, Tetrahedron: Asymmetry 2006, 17, 892-899. “Enantioselective Synthesis of 2-Alkylidenetetrahydrofurans based on a ′Cyclization / Enzymatic Resolution′ Strategy”. |
159. | Esen Bellur, Helmar Görls, Peter Langer*, J. Org. Chem. 2006, 71, 2332-2338. “Domino Reactions of 1,2-Diimidoyl-1,2-dichloroethanes. Synthesis of 3-Imino-1,2-dithia-3H-cyclopent-4-enes, 3-Amino-2-thioxo-2,5H-pyrrol-5-ones, 2,3-Diamino-4-thioxo-4H-thiopyrans and 6-Imino-6H-1,3-oxazines”. |
158. | Ilia Freifeld, Holger Armbrust, Peter Langer*, Synthesis 2006, 1807-1810. “Synthesis of 5-(Hydroxymethyl)pyrrolidin-2-ones by Cyclization of Amide Dianions with Epibromohydrin”. > > Highlighted in Organic Chemistry Portal (http://www.organic-chemistry.org/) |
157. | Constantin Mamat, Thomas Pundt, Andreas Schmidt, Peter Langer*, Tetrahedron Lett. 2006, 47, 2183-2185. “Regioselective Synthesis of 2-Acetyl- and 2-Alkoxycarbonyl-3-(trifluoromethyl)phenols by [3+3] Cyclization of 1,3-Bis-Silyl Enol Ethers with 4-Ethoxy- and 4-Silyloxy-1,1,1-trifluoroalk-3-en-2-ones”. |
156. | Nina Todorovic, Nguyen Thi Bich Phuong, Peter Langer*, Klaus Weisz*, Bioorg. Med. Chem. Lett. 2006, 16, 1647-1650. “DNA-triplex stabilization by a δ-carboline derivative tethered to third-strand oligonucleotides”. |
155. | Tuan Thanh Dang, Uwe Albrecht, Katrin Gerwien, Melanie Siebert, Peter Langer*, J. Org. Chem. 2006, 71, 2293-2301. “One-Pot Cyclizations of Dilithiated Oximes and Hydrazones with Epibromohydrin. Efficient Synthesis of 6-Hydroxymethyl-5,6-dihydro-4H-1,2-oxazines and Oxazolo[3,4-b]pyridazin-7-ones”. |
154. | Zafar Ahmed, Peter Langer*, Tetrahedron Lett. 2006, 47, 417-419. “Synthesis of Functionalized 4-Chlorophenols and 1,4-Dihydroquinones by [3+3] Cyclization of 1,3-Bis-Silyl Enol Ethers with 2-Chloro- and 2-Acyloxy-3-(silyloxy)alk-2-en-1-ones”. |
153. | Zafar Ahmed, Peter Langer*, Eur. J. Org. Chem. 2006, 1057-1060. “Synthesis Defunctionalization of α-Hydroxy-γ-alkylidenebutenolides by Palladium(0) Catalyzed Reaction of Enol Triflates with Hexylboronic Acid”. |
152. | Uwe Albrecht, Van Thi Hong Nguyen, Peter Langer*, Synthesis 2006, 1111-1116. “Synthesis of γ-(2,4-Dioxobut-1-ylidene)butenolides by Reaction of Masked 1,3-Dicarbonyl Dianions with Maleic Anhyrides and Phthaloyl Dichloride”. |
151. | Esen Bellur, Peter Langer*, Tetrahedron 2006, 62, 5426-5434. “Synthesis of 4-(3′-Hydroxyalkyl)pyrimidines by Ring Transformation Reactions of 2-Alkylidenetetrahydrofurans with Amidines”. |
150. | Van Thi Hong Nguyen, Esen Bellur, Bettina Appel, Peter Langer*, Synthesis 2006, 1103-1110. “Synthesis of 3-Alkyl- and 3-Chloroalkyl-2-hydroxybenzoates based on [3+3] Cyclizations of 4-Alkyl- and 4-Chloroalkyl-1,3-bis(trimethylsilyloxy)buta-1,3-dienes”. |
149. | Esen Bellur, Peter Langer*, Synthesis 2006, 480-488. “Chemo- and Regioselective Synthesis of Functionalized Furans based on a ′[3+2] Cyclization / Bromination / Elimination′ Strategy” |
148. | Van Thi Hong Nguyen, Esen Bellur, Peter Langer*, Tetrahedron Lett. 2006, 47, 113-116. “Synthesis of 2,5-Dihydrobenzo[b]oxepines and 5,6-Dihydro-2H-benzo[b]oxocines based on a ′[3+3] Cyclization−Olefin-Metathesis′ Strategy”. |
147. | Bettina Appel, Nehad N. R. Saleh, Peter Langer*, Chem. Eur. J. 2006, 12, 1221-1236. “Domino Reactions of 1,3-Bis-Silyl Enol Ethers with Benzopyrylium Triflates. Efficient Synthesis of fluorescent 6H-Benzo[c]chromen-6-ones, Dibenzo[c,d]chromen-6-ones and 2,3-Dihydro-1H-4,6-dioxachrysen-5-ones”. |
2005 | |
146. | Martin Hein*, Dirk Michalik, Peter Langer*, Synthesis 2005, 20, 3531-3534. “First Synthesis of N-Indigoglycosides - Analogues of Cancerostatic Akashines”. |
145. | Falko Helmholz, Rita Schroeder and Peter Langer*, Z. Naturforsch. B 2005, 60b, 1192-1196. “Synthesis of Unsymmetrical Bis(imidoyl)dichlorides of Oxalic Acid”. |
144. | Ehsan Ullah, Sven Rotzoll, Andreas Schmidt, Dirk Michalik, Peter Langer*, Tetrahedron Lett. 2005, 46, 8997-8999. “Synthesis of 7,8-Benzo-9-aza-4-oxabicyclo[3.3.1]nonan-3-ones by Sequential ′Condensation-Iodolactonization′ Reactions of 1,1-Bis(trimethylsilyloxy)ketene Acetals with Isoquinolines”. |
143. | Esen Bellur, Peter Langer*, J. Org. Chem. 2005, 70, 10013-10029. “Efficient Synthesis of (Furan-2-yl)acetates, 7-(Alkoxycarbonyl)benzofurans and 7-(Alkoxycarbonyl)-2,3-dihydrobenzofurans based on Cyclization Reactions of Free and Masked Dianions: a ′[3+2] Cyclization / Dehydrogenation′ Strategy”. |
142. | Stefanie Reim, Van Thi Hong Nguyen, Uwe Albrecht and Peter Langer*, Tetrahedron Lett. 2005, 46, 8423-8425. “Synthesis of 3,5-Dioxopimelates and 2,4-Dioxoadipates by Acylation of 1,3-Bis-Silyl Enol Ethers”. |
141. | Rüdiger Dede, Lars Michaelis, Peter Langer*, Tetrahedron Lett. 2005, 46, 8129-8131. “Regioselective Synthesis of Isotetronic Acids by Cyclization of 1,3-Bis(trimethylsilyloxy)alk-1-enes with Oxalyl Chloride”. Highlighted in Synlett 2007, 1172 (Synlett Spotlight 195) |
140. | Anja Bodtke, Wolf-Diethard Pfeiffer,* Norbert Ahrens, Peter Langer*, Tetrahedron 2005, 61, 10926-10929. “Horseradish Peroxidase (HRP) Catalyzed Oxidative Coupling Reactions using Aqueous Hydrogen Peroxide: An Environmentally Benign Procedure for the Synthesis of Azine Pigments”. |
139. | Ehsan Ullah and Peter Langer*, Synthesis 2005, 3189-3190. “Synthesis of Pyran-2-ones by Reaction of 1,1-Bis(trimethylsilyloxy)ketene Acetals with 3-Silyloxyalk-2-en-1-ones”. |
138. | Esen Bellur, Peter Langer*, J. Org. Chem. 2005, 70, 7686-7693. “Synthesis of Benzofurans with Remote Bromide Functionality Domino ‘Ring-Cleavage-Deprotection-Cyclization’ Reactions of 2-Alkylidenetetrahydrofurans with Boron Tribromide”. |
137. | Esen Bellur, Peter Langer*, Eur. J. Org. Chem. 2005, 4815-4828. “Synthesis of Functionalized 2-Alkylidenetetrahydrofurans based on a ′[3+2] Cyclization / Bromination / Palladium(0)-Cross-Coupling′ Strategy”. |
136. | Andreas Schmidt, Jörg-Peter Gütlein, Anja Preuss, Uwe Albrecht and Peter Langer*, Synlett 2005, 2489-2491. “Synthesis of 7,8-Benzo-3-hydroxy-9-azabicyclo[3.3.1]non-3-enes by Cyclocondensation of 1,3-Bis-Silyl Enol Ethers with Isoquinoline”. |
135. | Harald Below,* Wolf-Diethard Pfeiffer, Karlheinz Geisler, Michael Lalk and Peter Langer*, Eur. J. Org. Chem. 2005, 3637-3639. “1,3-Selenazole”. |
134. | Peter Langer,* Anja Bodtke, Nehad N. R. Saleh, Peter R. Schreiner*, Angew. Chem. 2005, 117, 5389-5393; Angew. Chem. Int. Ed. 2005, 44, 5255-5259. “3,5,7,9-Tetraphenylhexaazaacridine: A Highly Stable, weakly Antiaromatic Species with 16 π-Electrons”. Highlighted in Nachr. Chem. 2005, 54, 241 (Trendberichte Organische Chemie 2005) Highlighted in Synfacts 2005, 02, 0204 |
133. | Uwe Albrecht, Dirk Gördes, Enrico Schmidt, Kerstin Thurow, Michael Lalk, Peter Langer*, Bioorg. Med Chem. 2005, 13, 4402-4407. “Synthesis and Structure-Activity Relationships of 2-Alkylidenethiazolidine-4,5-diones as Potent Antibiotic Agents”. |
132. | Sven Rotzoll, Bettina Appel and Peter Langer*, Tetrahedron Lett. 2005, 46, 4057-4059. “Synthesis of 2,3-Benzoxepins by Sequential Cyclopropanation / Ring-Enlargement Reactions of Benzopyrylium Triflates with Diazoesters”. |
131. | Zafar Ahmed, Uwe Albrecht, Peter Langer*, Eur. J. Org. Chem. 2005, 3469-3474. “Synthesis of Leprapinic Acid, Calycine and Analogues by Sequential ‘[3+2]-Cyclization / Suzuki / Lactonization’ Reactions”. |
130. | Sabine Ciecholewski, Elke Hammer,* Katrin Manda, Gopal Bose, Van T. H. Nguyen, Peter Langer*, Frieder Schauer, Tetrahedron 2005, 61, 4615-4619. “Laccase-Catalyzed Carbon-Carbon Bond Formation: Oxidative Dimerization of Salicylic Esters by Air in Aqueous Solution”. |
129. | Gopal Bose, Peter Langer*, Synlett 2005, 1021-1023. “Synthesis of Linderone and Lucidone based on One-Pot Cyclizations of 1,3-Bis-Silyl Enol Ethers with Oxalyl Chloride”. |
128. | Esen Bellur, Ilia Freifeld, Peter Langer*, Tetrahedron Lett. 2005, 46, 2185-2187. “Efficient Synthesis of Functionalized Furans and Benzofurans based on a ′[3+2] Cyclization / Oxidation′ Strategy”. |
127. | Esen Bellur, Helmar Görls and Peter Langer*, J. Org. Chem. 2005, 70, 4751-4761. “Synthesis of 2-Alkylidenepyrrolidines, Pyrroles and Indoles by Condensation of Silyl Enol Ethers and 1,3-Bis-Silyl Enol Ethers with 1-Azido-2,2-dimethoxyethane and subsequent Reductive Cyclization”. |
126. | Zafar Ahmed and Peter Langer*, Tetrahedron 2005, 61, 2055-2063. “Synthesis of Natural Pulvinic Acids based on a ′[3+2] Cyclization−Suzuki Cross-Coupling′ Strategy”. |
125. | Uwe Albrecht, Michael Lalk* and Peter Langer*, Bioorg. Med. Chem. 2005, 13, 1531-1536. “Synthesis and Structure-Activity Relationships of 2-Vinylchroman-4-ones as Potent Antibiotic Agents”. |
124. | Esen Bellur, Helmar Görls and Peter Langer*, Eur. J. Org. Chem. 2005, 2074-2090. “Regioselective Synthesis of Functionalized Furans by Cyclization of 1,3-Bis-Silyl Enol Ethers with 1-Chloro-2,2-dimethoxyethane”. |
123. | Uwe Albrecht, Katrin Gerwien and Peter Langer*, Tetrahedron Lett. 2005, 46, 1017-1019. “Synthesis of 6-Hydroxymethyl-5,6-dihydrooxazines by One-Pot-Cyclization of Dilithiated Oximes with Epibromohydrin”. |
122. | Van Thi Hong Nguyen and Peter Langer*, Tetrahedron Lett. 2005, 46, 1013-1015. “Synthesis of Dibenzo[b,d]pyran-6-ones based on a ‘[3+3]-Cyclization−Suzuki-Cross-Coupling’ Strategy”. |
121. | Van Thi Hong Nguyen and Peter Langer*, Tetrahedron Lett. 2005, 46, 815-817. “Synthesis of Functionalized Benzopyrans by Sequential [3+3]-Cyclization−Williamson Reactions of 1,3-Bis(trimethylsilyloxy)-7-chlorohepta-1,3-dienes”. |
120. | Christian Haase and Peter Langer*, Synlett 2005, 453-456. “Efficient Preparation of 5-Alkylidene-2,5-dihydropyrrol-2-ones by Ring-Transformations of γ-Alkylidenebutenolides. Formal Total Synthesis of Pukeleimide A”. |
119. | Edith Holtz, Valentin Köhler, Bettina Appel and Peter Langer,* Eur. J. Org. Chem 2005, 532-542. “Efficient Synthesis of Functionalized 4-Hydroxycyclopent-2-en-1-ones by Cyclization of 1,3-Bis-Silyl Enol Ethers and 1,3-Dicarbonyl Dianions with 1,2-Diketones”. |
118. | Esen Bellur, Peter Langer*, J. Org. Chem. 2005, 70, 3819-3825. “Synthesis of ε-Halo-β-ketoesters and γ,γ′-Dibromoalkanones by Regio- and Chemoselective Reaction of 2-Alkylidenetetrahydrofurans with Borontrihalides: A ′Ring-Closure / Ring-Cleavage′ Strategy”. |
2004 | |
117. | Gopal Bose, Van Thi Hong Nguyen, Ehsan Ullah, Sunanda Lahiri, Helmar Görls and Peter Langer*, J. Org. Chem. 2004, 69, 9128-9134. “Domino ′[3+3]-Cyclization-homo-Michael′ Reactions of 1,3-Bis-Silyl Enol Ethers with 1,1-Diacylcyclopropanes”. |
116. | Gopal Bose, Ehsan Ullah and Peter Langer*, Chem. Eur. J. 2004, 10, 6015-6028. “Synthesis of Spiro[5.4]decenones and their Transformation into Bicyclo[4.4.0]deca-1,4-dien-3-ones by Domino ′Elimination–Double-Wagner-Meerwein-Rearrangement′ Reactions”. |
115. | Rüdiger Dede and Peter Langer*, Tetrahedron Lett. 2004, 45, 9177-9179. “Regioselective Synthesis of Functionalized Acetophenones by [3+3] Cyclizations of 1,3-Bis-Silyl Enol Ethers with 2-Acetyl-1-silyloxybut-1-en-3-one”. |
114. | Ehsan Ullah and Peter Langer*, Synlett 2004, 2782-2784. “One-Pot Synthesis of 3-Hydroxymaleic Anhydrides by Cyclization of 1,1-Bis(trimethylsilyloxy)ketene Acetals with Oxalyl Chloride”. Highlighted in Synlett 2007, 1172 (Synlett Spotlight 195) |
113. | Joachim T. Anders, Van Thi Hong Nguyen and Peter Langer,* Synlett 2004, 2779-2781. “Efficient Synthesis of Functionalized 2-Carbamoylpyran-4-ones by Ring-Transformation of 5-Alkylidene-2,5-dihydropyrrol-2-ones”. |
112. | Anja Bodtke and Peter Langer*, Tetrahedron Lett. 2004, 45, 8741-8743. “Efficient Synthesis of Tricyclic Quinazolines by One-Pot Cyclizations of 2-(Dichloroisocyanido)benzonitrile”. |
111. | Joachim T. Anders and Peter Langer*, Eur. J. Org. Chem. 2004, 5020-5026. “Domino ′Cyclization-Electrocyclization-Elimination′ Reactions of Arylmethylnitriles with Oxalic Acid-bis(naphthylimidoyl) Dichlorides: Efficient Synthesis of Fluorescent 7H-Benzo[g]indolino[3,2-b]benzo[h]quinolines”. |
110. | Uwe Albrecht and Peter Langer*, Synlett 2004, 2200-2202. “Synthesis of 2-Alkylidene-4-(hydroxymethyl)thiazolidines by One-Pot Cyclization of Dilithiated Arylmethylnitriles with Isothiocyanates and Epibromohydrin”. |
109. | Steven Collier, Peter Langer, Science of Synthesis (Shinkai, I.; Murahashi, S., eds.), Chapter 19.5.15, Thieme, Stuttgart: 2004. “Applications of Nitriles as Reagents for Organic Synthesis with Loss of the Nitrile Functionality (incl. cycloaddition reactions)”. |
108. | Anett Kirschner, Peter Langer*, Uwe T. Bornscheuer*, Tetrahedron: Asymmetry 2004, 15, 2871-2874. “Lipase-catalyzed highly enantioselective kinetic resolution of racemic α-hydroxy butenolides”. |
107. | Esen Bellur and Peter Langer*, Synlett 2004, 2172-2174. “Reaction of 2-Alkylidenetetrahydrofurans with Borontribromide: Chemo- and Regioselective Synthesis of 6-Bromo-3-oxoalkanoates by Application of a ′Cylization-Ring-Opening′ Strategy”. |
106. | Uwe Albrecht and Peter Langer*, Synlett 2004, 1963-1964. “Synthesis of 2-Alkylidenethiazolidine-4,5-diones and 2-Alkylideneoxazolidine-4,5-diones by One-Pot Cyclization of Arylacetonitriles with Heterocumulenes and Ethyl 2-Chloro-2-oxoacetate”. |
105. | Peter Langer*, Walter Freiberg, Chem. Rev. 2004, 104, 4125-4149. “Cyclization Reactions of Dianions in Organic Synthesis”. |
104. | Edith Holtz and Peter Langer*, Synlett 2004, 1805-1807. “Synthesis of 2-Alkenyl-3-alkoxycarbonylfurans by ¢Feist-Benary-Cyclocondensation¢ of (2,4-Dioxobutylidene)phosphoranes with Chloroacetaldehyde and subsequent Wittig Reactions”. |
103. | Esen Bellur and Peter Langer*, Synlett 2004, 2169-2171. “Functionalization of 2-Alkylidenetetrahydrofurans and 2-Alkylidenepyrrolidines by Palladium(0)-Catalyzed Cross-Coupling-Reactions”. |
102. | Gopal Bose and Peter Langer*, Tetrahedron Lett. 2004, 3861-3863. “Synthesis and Reactivity of 1-Hydroxyspiro[2.5]cyclooct-4-en-3-ones”. |
101. | Uwe Albrecht, Thi Hong Van Nguyen and Peter Langer*, J. Org. Chem. 2004, 69, 3417-3424. “Synthesis of 4,5-Benzotropones by Cyclization of 1,3-Bis-Silyl Enol Ethers with 1,2-Dialdehydes”. |
100. | Zafar Ahmed, Peter Langer*, J. Org. Chem. 2004, 69, 3753-3757. “Suzuki Cross Coupling Reactions of γ-Alkylidenebutenolides: Application to the Synthesis of Vulpinic Acid”. |
99. | Joachim T. Anders, Helmar Görls, Peter Langer*, Eur. J. Org. Chem. 2004, 1897-1910. “Synthesis of N-Aryl-5-alkylidene-2,5-dihydropyrrol-2-ones by ′Cyclization–Dimroth-Rearrangement′ Reactions of 1,3-Dicarbonyl Dianions with Bis(imidoyl)dichlorides of Oxalic Acid”. |
98. | Anja Bodtke, Wolf-Diethard Pfeiffer*, Norbert Ahrens, Peter Langer*, Bioorg. Med. Chem. Lett. 2004, 14, 1509-1511. “Peroxidase Catalyzed Formation of Azine Pigments – A Convenient and Sensitive Method for the Identification of Human Cells with Positive Peroxidase Reactivity”. |
97. | Karlheinz Geisler*, Wolf-Diethard Pfeiffer, Andreas Künzler, Harald Below, Ehrenfried Bulka, Peter Langer*, Synthesis 2004, 875-884. “Synthesis of 1,3-Selenazoles and Bis(selenazoles) from Primary Selenocarboxylic Amides and Selenourea”. |
96. | Peter Langer* and Rita Schröder, Eur. J. Org. Chem. 2004, 1025-1032. “Synthesis of 2-Arylamino-2-aryliminoacetic amides”. |
95. | Karlheinz Geisler*, Andreas Künzler, Ehrenfried Bulka, Wolf-Diethard Pfeiffer and Peter Langer*, Synthesis 2004, 97-105. “Synthesis and Reactivity of 2-Acyl-1,3-selenazoles”. |
94. | Uwe Albrecht and Holger Armbrust, Peter Langer*, Synlett 2004, 143-145. “Synthesis of Unsymmetrical Tropanes by Domino Cyclization of 1,3-Bis-Silyl Enol Ethers with Iminium Salts”. |
2003 | |
93. | U. T. Bornscheuer, A. Musidlowska-Persson, D. Böttcher, K. Liebeton, P. Lorenz, J. Eck, H. Zinke, C. Schleper, P. Langer, H. Trauthwein, A. Karau, S. Buchholz, Transkript 2003, 9, 81-84. „Esterasen und Lipasen aus kultivierten und nicht-kultivierten Mikroorganismen“. |
92. | Peter Langer*, Ilia Freifeld, Heydar Shojaei, Chem. Commun. 2003, 3044-3045. “Domino 'Staudinger–Aza-Wittig–1,5-Phosphonium-Rearangement–Fragmentation' Reactions of 1-Azido-2-hydroxy-4,6-dioxohexanes”. |
91. | Peter Langer*, Falko Helmholtz, Rita Schröder, Synlett 2003, 2389-2391. “Synthesis of Unsymmetrical Pyrrolo[3,2-b]pyrrole-2,5-diones”. |
90. | Wolf-Diethard Pfeiffer*, Erich Dilk, Harald Roßberg and Peter Langer*, Synlett 2003, 2392-2394. “Synthesis and Reactivity of 3,4-Dimethyl-4H-1,3,4-thiadiazines”. |
89. | Peter Langer* and Esen Bellur, J. Org. Chem. 2003, 68, 9742-9746. “Chemo-, Regio- and E/Z-Diastereoselective Synthesis of 2-Alkylidenetetrahydrofurans by Sequential Reactions of Ambident Dianions and Monoanions”. |
88. | Peter Langer* and Bettina Appel, Tetrahedron Lett. 2003, 7921-7923. “Domino Michael-Retro-Michael-Aldol¢ Reactions of 1,3-Bis-Silyl Enol Ethers with 3-Formylchromones”. |
87. | Peter Langer* and Anja Bodtke, Synlett 2003, 1743-1745. “Domino Cyclization of 2-Isothiocyanatobenzonitrile with α-Aminocarboxylic Esters and Acids”. |
86. | Peter Langer* and Anja Bodtke, Tetrahedron Lett. 2003, 5965-5967. “Sequential Cyclizations of 2-Isothiocyanatobenzonitrile with α-Aminoketones”. |
85. | Peter Langer* and Gopal Bose, Angew. Chem. 2003, 115, 4165-4168; Angew. Chem. Int. Ed. 2003, 42, 4033-4036. “[3+3] Cyclizations of 1,3-Bis-Silyl Enol Ethers with 1,1-Diacetylcyclopentane and 1,1-Diacetylcyclopropane”. |
84. | Peter Langer* and Uwe Albrecht, Synlett 2003, 1503-1505. “Regioselective Cyclization of 2-Isothiocyanatobenzonitrile with Carbon 1,1-Dinucleophiles”. |
83. | Karlheinz Geisler*, Andreas Künstler, Ehrenfried Bulka, Wolf-Diethard Pfeiffer and Peter Langer*, Synlett 2003, 1195-1197. “Efficient Synthesis of 2-Unsubstituted 1,3-Selenazoles”. |
82. | Peter Langer* and Bettina Appel, Tetrahedron Lett. 2003, 5133-5135. “Efficient Synthesis of Benzopyrano[2,3-b]pyridines by Cyclization of 1,3-Bis-Silyl Enol Ethers with 3-Cyanobenzopyran-4-ones”. |
81. | Karlheinz Geisler*, Wolf-Diethard Pfeiffer, Cornelia Müller, Elvira Nobst, Ehrenfried Bulka, and Peter Langer*, Synthesis 2003, 1215-1220. “Synthesis and Functionalization of 4-Halomethyl-1,3-selenazoles”. |
80. | Peter Langer*, Joachim T. Anders, Judith Jähnchen, Klaus Weisz, Chem. Eur. J. 2003, 9, 3951-3964. “Efficient Synthesis of 2-Alkylidene-3-iminoindoles, Indolo[1,2-b]isoquinolin-5-ones, d-Carbolines and Indirubines by Domino and Sequential Reactions of Functionalized Nitriles”. |
79. | Peter Langer*, Dietmar Seyferth and Helmar Görls, Eur. J. Org. Chem. 2003, 1948-1953. “Synthesis of Nitrile Oligomers by Multiple Anion Capture Reactions of Allene Dianions”. |
78. | Peter Langer* in Organic Synthesis Highlights V (H.-G. Schmalz, T. Wirth, Eds.), Wiley-VCH 2003, 165–177. “The Asymmetric Baylis-Hillman-Reaction”. |
77. | Peter Langer* and Edith Holtz, Synlett 2003, 402–404. “Domino 'Michael-Retro-Michael-Wittig' Reactions of (2,4-Dioxobutylidene)-phosphoranes with 3-Formylchromones”. |
76. | Janet Blank, Madeleine Kandt, Wolf-Diethard Pfeiffer*, Annemarie Hetzheim, and Peter Langer*, Eur. J. Org. Chem. 2003, 182-189. “Domino Cyclization of 2-Isothiocyanatobenzonitrile with Carboxylic Hydrazides – One-Pot Synthesis of 5-Thioxo-5,6-dihydro-1,2,4-triazolo[1,5-c]quinazolines”. |
2002 | |
75. | Karlheinz Geisler*, Anke Jacobs, Andreas Künstler, Manuela Mattes, Ilona Girrleit, Brigitte Zimmermann, Ehrenfried Bulka, Wolf-Diethard Pfeiffer, and Peter Langer*, Synlett 2002, 1983-1986. “Efficient Synthesis of Primary Selenocarboxylic Amides by Reaction of Nitriles with Phosphorous(V)selenide”. |
74. | Peter Langer*, Ilia Freifeld, Chem. Commun. 2002, 2668-2669. “Efficient and Regioselective Synthesis of Functionalized Pyrroles by Cyclocondensation of 1,3-Dicarbonyl Dianions with α-Azidoketones”. |
73. | Peter Langer*, Uwe Albrecht, Synlett 2002, 1841-1842. “Synthesis of Spirocyclic Butenolides by a Ring Closing Metathesis Strategy”. |
72. | Peter Langer*, Nehad N. R. Saleh, Valentin Köhler, Eur. J. Org. Chem. 2002, 1566-1572. “Synthesis of γ-Lactones and Ascorbic Acid Analogues by Diastereoselective Hydrogenation of α-Hydroxy-γ-alkylidenebutenolides”. |
71. | Fritz Scholz*, Rubin Gulaboski, Valentin Mirceski, Peter Langer, Electrochem. Comm. 2002, 4, 659-662. “Quantification of the chiral recognition in electrochemically driven ion transfer across the interface water / chiral liquid”. |
70. | Peter Langer*, Joachim T. Anders, Eur. J. Org. Chem. 2002, 686-691. “Synthesis of Bis- and Tris(indolinylidenemethyl)benzenes by One-Pot Reactions of Polylithiated Nitriles with Bis(imidoyl)chlorides of Oxalic Acid”. |
69. | Peter Langer*, Synthesis 2002 (invited Review), 441-459. “Cyclization Reactions of 1,3-Bis-Silyl Enol Ethers and Related Masked Dianions”. |
68. | Peter Langer*, Manfred Döring, Eur. J. Org. Chem. 2002 (invited Review), 221-234. “Efficient Synthesis of Nitrogen Heterocycles by Cyclization of Bis(nucleophiles) with Oxaldiimidoyl Dichlorides”. |
67. | Peter Langer*, Nehad N. R. Saleh and Ilia Freifeld, Chem. Commun. 2002, 168-169. “Efficient Synthesis of Biaryl Lactones by Domino Retro-Michael—Aldol—Lactonization Reactions of Functionalized 2,3-Dihydrobenzopyrans”. |
66. | Peter Langer*, Edith Holtz, Synlett 2002, 110-112. “Olefin Cross-Metathesis of Alkenyl Epoxides with Allyl- and Vinyltrimethylsilane”. |
65. | Peter Langer*, Holger Armbrust, Tobias Eckardt and Jörg Magull, Chem. Eur. J. 2002, 8, 1443-1455. “Synthesis of Functionalized 2-Alkylidenetetrahydrofurans by Cyclization of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with Epoxides”. |
64. | Peter Langer*, Edith Holtz and Nehad N. R. Saleh, Chem. Eur. J. 2002, 8, 917-928. “Efficient and Stereoselective Synthesis of Bicyclo[3.2.1]octan-8-ones — Synthesis and Palladium-catalyzed Isomerization of Functionalized 2-Vinyl-2,3,3a,4,5,6-hexahydro-2,3-benzofurans”. |
2001 | |
63. | Peter Langer*, Ilia Freifeld, Org. Lett. 2001, 3903-3905. “Chemo-, Regio- and Diastereoselective Synthesis of Functionalized Cyclopropyl Nitriles by Cyclization of 1,1-Dianions with Epibromohydrin”. |
62. | Peter Langer*, Bettina Kracke, Synlett 2001, 1790-1792. “Regio- and Diastereoselective Synthesis of Functionalized Cyclopentenones by Domino Michael-Ester-Wittig Reactions of (3-Alkoxycarbonyl-2-oxopropylidene)triphenyl phosphoranes with Maleic Diesters”. |
61. | Peter Langer*, Edith Holtz, Inass Karimé, Nehad N. R. Saleh, J. Org. Chem. 2001, 66, 6057-6063. “Regio- and Diastereoselective Synthesis of 2-Alkylidenetetrahydrofurans by Domino SN/SN' and SN/SN Reactions of 1,3-Dicarbonyl Dianions”. |
60. | Peter Langer, Habilitationsschrift, Universität Göttingen, 2001. “New Strategies for the Efficient Synthesis of Medium-Sized Bicyclic γ-Alkylidenebutenolides Based on Regioselective Cyclizations of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with Oxalyl Chloride”. |
59. | Peter Langer*, Tobias Eckardt, Nehad N. R. Saleh, Inass Karimé, Peter Müller, Eur. J. Org. Chem. 2001, 3657-3667. “New Strategies for the Synthesis of Medium-Sized Bicyclic Butenolides Based on Lewis Acid Catalyzed [3+2]-Cyclizations of Bis-Silyl Enol Ethers”. |
58. | Peter Langer*, Joachim T. Anders, Manfred Döring, Helmar Görls, Eur. J. Org. Chem. 2001, 3953-3958. “One-Pot Synthesis of (3-Imino-2,3-dihydro-1H-indol-2-ylidene)acetic Amides by Double-Anion-Capture-Reactions of Amide Carbanions with Oxal Di(imidoyl)-dichlorides”. |
57. | Peter Langer*, Manfred Döring, Synlett 2001, 1437-1439. “Regio- and Stereoselective Synthesis of N-Aryl-5-alkylidene-5H-pyrrol-2-ones by a New Domino Reaction of 1,3-Dicarbonyl Dianions with Oxalic Acid-bis(imidoyl)chlorides”. |
56. | Peter Langer*, Jörg Wuckelt, Manfred Döring,* Peter R. Schreiner, and Helmar Görls, Eur. J. Org. Chem. 2001, 2257-2263. “Regioselective Anionic [3+2] Cyclizations of Isoxazole, Pyrazole and 1,2,4-Triazole Dinucleophiles — Efficient Synthesis of 2,4-Dihydroimidazo[4,5-b]quinoxalines, 3H-Imidazo[1,2-b]pyrazoles and 5H-Imidazo[2,1-c]-1,2,4-triazoles”. |
55. | Peter Langer*, Tobias Eckardt, Toni Schneider, Cornelia Göbel, and Regine Herbst-Irmer, J. Org. Chem. 2001, 66, 2222-2226. “Efficient Synthesis of γ-Alkylidenetetronic Esters by Sequential Lewis Acid Catalyzed [3+2] Cyclizations and Palladium-Catalyzed Cross Coupling Reactions”. |
54. | Peter Langer*, Chem. Eur. J. 2001, 7, 3858-3866 (Concept Article). “Regio- and Diastereoselective Cyclization Reactions of Free and Masked 1,3-Dicarbonyl Dianions with 1,2-Dielectrophiles”. |
53. | Peter Langer*, Uwe Albrecht, Synlett 2001, 526-528. “Efficient Synthesis of Functionalized 4,5-Benzotropones by Regioselective Cyclization of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with Phthalic Dialdehyde”. |
52. | Peter Langer*, Ilia Freifeld, Synlett 2001, 523-525. “Regio- and Diastereoselective Synthesis of Lissoclinolide Analogues by Lewis Acid Catalyzed Cyclization of the First 1,5-Bis(trimethylsilyloxy)-1,3,5-hexatrienes with Oxalyl Chloride”. |
51. | Peter Langer*, Manfred Döring, Helmar Görls, Eur. J. Org. Chem. 2001, 1511-1517. “Regioselective Synthesis of Heterospirocyclic Isobenzofuranones and Medium-Sized Lactones by Multiple Anion Capture Reactions of 1,3-Dianions”. |
50. | Peter Langer*, Jörg Wuckelt, Manfred Döring*, Helmar Görls, Eur. J. Org. Chem. 2001, 1503-1509. “Double Anion Capture Reactions of Anthranilic Esters with Oxaldiimidoyl Dichlorides - Efficient Synthesis of 2,2'-Biquinazoline-4,4'(3H,3'H)-diones”. |
49. | Peter Langer*, Manfred Döring, Peter R. Schreiner, Helmar Görls, Chem. Eur. J. 2001, 7, 2617-2627. “Synthesis of Radialene-shaped Pyrroles by Multiple-Anion-Capture Reactions of 1,3-Dianions”. |
48. | Peter Langer*, Jörg Wuckelt, Manfred Döring*, Peter R. Schreiner, Helmar Görls, Eur. J. Org. Chem. 2001, 2245-2255. “Regioselective Cyclizations of Imidazole Dinucleophiles with Oxaldiimidoyl Dichlorides – A Combined Experimental and Theoretical Study”. |
47. | Peter Langer*, Thilo Krummel, Chem. Eur. J. 2001, 7, 1720-1727. “Chemo-, Regio- and Stereoselective Cyclizations of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with α-Chloroacetic Acid Chlorides and α-Chloroacetic Acetals”. |
46. | Jörg Wuckelt, Manfred Döring*, Helmar Görls, Peter Langer*, Eur. J. Inorg. Chem. 2001, 805-811. “Synthesis and Properties of Dimetallic Carbonyl Complexes based on New Oxalamidine Derived Ligands with Pendant Pyridine Functionality”. |
45. | Peter Langer*, Manfred Döring, Dietmar Seyferth, Helmar Görls, Chem. Eur. J. 2001, 7, 573-584. “Direct Transformation of Silyl Enol Ethers into Allenes”. |
44. | Peter Langer*, Ilia Freifeld, Chem. Eur. J. 2001, 7, 565-572. “Regio- and Stereoselective Synthesis of Nor-Nonactinic Acid Derivatives - Kinetic Reaction Control in the Lewis Acid mediated Domino Reaction of 1,3-Dicarbonyl-Dianions with 1-Bromo-2,3-Epoxypropanes”. |
2000 | |
43. | Peter Langer*, Nehad N. R. Saleh, Org. Lett. 2000, 2, 3333-3336. “Regioselective Synthesis of Medium-Sized Bicyclic Butenolides by Lewis Acid catalyzed Cyclization of Cyclic 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with Oxalyl Chloride”. |
42. | Peter Langer*, Tobias Eckardt, Martin Stoll, Org. Lett. 2000, 2991-2993. “Efficient Synthesis of Butenolide—Medium Ring Ether Hybrids by a [3+2] Cyclization—Ring-Closing Metathesis Strategy”. |
41. | Peter Langer*, Valentin Köhler, Chem. Commun. 2000, 1653-1654. “First Oxidative Dimerization of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes”. |
40. | Peter Langer*, J. Prakt. Chem. 2000, 342, 728-730. “Tetra-n-propyl Ammonium Perruthenate (TPAP) – an Efficient and Selective Reagent for the Oxidation of Alcohols to Aldehydes”. |
39. | Peter Langer*, Valentin Köhler, Org. Lett. 2000, 2, 1597-1599. “First Domino Mukaiyama-Aldol-Cyclizations of 1,3-Dianion Synthons with 1,2-Diketones”. |
38. | Peter Langer*, Bettina Kracke, Tetrahedron Lett. 2000, 4545-4547. “Regioselective Synthesis of Functionalized Homophthalates by Cyclizations of 1,3-Bis(trimethylsilyloxy)-1,3-dienes with α-Allenylesters”. |
37. | Peter Langer*, Tobias Eckardt, Angew. Chem. 2000, 112, 4503-4506; Angew. Chem. Int. Ed. 2000, 39, 4343-4346. “Chemo-, Regio- and Stereoselective Cyclization of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with Functionalized Epoxides”. |
36. | Peter Langer*, Thilo Krummel, Chem. Commun. 2000, 967-968. “Chemo- and Regioselective Synthesis of Functionalized 3(2H)-Furanones by the First Cyclizations of 1,3-Bis(trimethylsilyloxy)-1,3-dienes with α-Chlorocarboxylic Acid Chlorides”. |
35. | Peter Langer*, Inass Karimé, Synlett 2000, 743-745. “Regio- and Stereoselective Synthesis of 2-Alkylidenetetrahydrofurans by Domino-Cyclodialkylations of 1,3-Dicarbonyl Dianions with 1-Bromo-2-chloroethane”. |
34. | Peter Langer*, Toni Schneider, Synlett 2000, 497-500. “Regioselective Synthesis and Acylations of Cyclic 1,3-Bis(trimethylsiloxy)-1,3-dienes - New and Versatile 1,3-Dianion Synthons”. |
33. | Peter Langer*, Tobias Eckardt, Synlett 2000, 844-847. “New and Regioselective Synthesis of 4-Ylidenetetronic Acids by Cyclization of 4-Alkyloxy-bis(trimethylsiloxy)-1,3-dienes with Oxalyl Chloride”. |
32. | Peter Langer*, Edith Holtz, Angew. Chem. 2000, 112, 3208-3211; Angew. Chem. Int. Ed. 2000, 39, 3086-3090. “Stereoselective Synthesis and Palladium-catalyzed Transformations of 2-Alkylidene-5-vinyltetrahydrofurans”. |
31. | Peter Langer*, Ilia Freifeld, Edith Holtz, Synlett 2000, 501-503. “Chemo-, Regio- and Stereoselective Synthesis of 2-Alkylidene-5-hydroxymethyl-tetrahydrofurans by Reaction of 1,3-Dicarbonyl-Dianions with 1-Bromo-2,3-Epoxypropanes”. |
30. | Peter Langer*, Angew. Chem. 2000, 112, 3177-3180; Angew. Chem. Int. Ed. 2000, 39, 3049-3052. “New Strategies for the Development of an Asymmetric Version of the Baylis-Hillman Reaction”. |
29. | Peter Langer*, Jörg Wuckelt, Manfred Döring, Helmar Görls, J. Org. Chem. 2000, 65, 3603. “Stereoselective Synthesis of 2-Alkylidene-3-imino-indoles by Reaction of 1,1-Dianions with Bis(imidoyl)chlorides of Oxalic Acid”. |
28. | Peter Langer*, Martin Stoll, Toni Schneider, Chem. Eur. J. 2000, 6, 3204-3214. “Efficient and General Synthesis of γ-Alkylidenebutenolides by the first Lewis-Acid Catalyzed Cyclizations of 1,3-Bis(trimethylsiloxy)-1,3-dienes with Oxalyl Chloride”. |
27. | Peter Langer*, Jörg Wuckelt, Manfred Döring*, J. Org. Chem. 2000, 65, 729-734. “New and Efficient Synthesis of Pyrrolo[3,2-b]pyrrole-2,5-diones by Double-Anion-Capture Reactions of Ester-Carbanions with Bis(imidoyl)chlorides of Oxalic Acid”. |
1999 | |
26. | Peter Langer*, Manfred Döring, Chem. Commun. 1999, 2439-2440. “Cyclization Reactions of Vicinal Dianions with 1,2-Dielectrophiles – Synthesis and Properties of the First 2,3-Diiminothietanes”. |
25. | Peter Langer*, Chem. Commun. 1999, 1217-1218. “Synthesis and Domino Reactions of 1,1-Bis(hydroxymethyl)allenes”. |
24. | Peter Langer*, Peter R. Schreiner*, Nachr. Chem. Tech. Lab. 1999, 1093-1094. “Merck-Schuchardt-Lecture 1999 – Barry M. Trost”. |
23. | Peter Langer*, Martin Stoll, Angew. Chem. 1999, 111, 1919-1922; Angew. Chem. Int. Ed. 1999, 38, 1803-1805. “Regio- and Stereoselektive Synthesis of γ-Alkylidenebutenolides by Cyclization of Dilithiated 1,3-Dicarbonyl Compounds with N,N'-Dimethoxy-N,N'-dimethylethane-diamide”. |
22. | Jörg Wuckelt, Manfred Döring*, Rainer Beckert, Peter Langer*, Synlett 1999, 1100-1102. “Efficient Synthesis of Quinazolin-4-ones and Axially Chiral 2,2-Bis-quinazolin-4-ones by Reaction of Anthranilic Acid Derived Nucleophiles with Oxalic acid bis(imidoyl)chlorides”. |
21. | Jörg Wuckelt, Manfred Döring*, Peter Langer*, Rainer Beckert, Synlett 1999, 468-470. “Domino-Reaction of Oxal(imidoyl)chlorides with 3-Aminoisoxazoles: Regio- and Stereoselective Synthesis of 1,4-Dihydro-imidazo[4,5-b]quinoxalines”. |
20. | Thomas Billert, Rainer Beckert*, Peer Fehling, Manfred Döring*, Jörg Brandenburg, Helmar Görls, Peter Langer*, J. Heterocycl. Chem. 1999, 36, 627-633. “A New Domino Reaction based on [4+2] Cycloadditions of Pyrido[1,2-a]pyrazines with Azadienophiles”. |
19. | Jörg Wuckelt, Manfred Döring*, Peter Langer*, Rainer Beckert, Helmar Görls, J. Org. Chem. 1999, 64, 365-372. “Regioselective Synthesis of 5-Ylidenepyrrol-2(5H)-ones by Reaction of Transition Metal-Coordinated Bis(imidoyl) Chlorides with Carbon Nucleophiles”. |
18. | Peter Langer*, Manfred Döring, Dietmar Seyferth, Synlett 1999, 135-137. “Synthesis of Medium-Sized Rings, Spiro-annulated Oxazacycles and 1-Amino-3-Siloxy Dienes based on Regioselective Reactions of Ambident 1,3-Dianions”. |
1998 | |
17. | Peter Langer*, Manfred Döring, Dietmar Seyferth, Chem. Commun. 1998, 1927-1928. “Domino reaction of Lithiated Allenes with Nitriles”. |
16. | Peter Langer*, Jörg Wuckelt, Manfred Döring*, Rainer Beckert, Eur. J. Org. Chem. 1998, 1467-1470. “The Reaction of Ambident Dianions with Oxalic Acid Dielectrophiles. Effect of the Heteroatoms of the Dinucleophile on the Regiochemistry of Cyclization”. |
15. | Peter Langer*, Manfred Döring*, Synlett 1998, 399-401. “New and Convenient Synthesis of Pyrrolo[1,2-a]benzimidazoles and Indolizinones based on Regioselective Cyclization Reactions of Heterocyclic Dianions”. |
14. | Peter Langer*, Manfred Döring*, Synlett 1998, 396-398. “Efficient and Stereoselective Syntheses of (3-Imino-2,3-dihydro-1H-indol-2-ylidene)acetonitriles and –sulfones”. |
13. | Jörg Wuckelt, Manfred Döring*, Peter Langer*, Helmar Görls, Rainer Beckert, Tetrahedron Lett. 1998, 39, 1135-1138. “New and Convenient Synthesis of α-Tetramic Acid Amides via a Cobalt(II)-Mediated Reaction Cascade”. |
12. | Peter Langer, Stuart J. Ince, Steven V. Ley*, J. Chem. Soc., Perkin Trans 1 1998, 3913-3915. “Assembly of Dendritic Glycoclusters from Monomeric Mannose Building Blocks”. |
11. | Luke Green, Berthold Hinzen, Stuart Ince, Peter Langer, Steven Ley*, Stuart Warriner, Synlett 1998, 440-442. “One-Pot Preparation of Penta- and Heptasaccharides based on the Principles of Orthogonality and Reactivity-Tuning”. |
10. | Peter Langer, H. M. R. Hoffmann, Rüdiger Wartchow*, Z. Krist. 1998, 193-194. “Crystal Structure of (3S,8R,9R)-3,9-Dihydroxy-6'-methoxy-3-phenyl-10,11-dinorcin-chonane hemihydrate, (C24H26N2O3) • 0.5H2O”. |
9. | Jens Frackenpohl, Peter Langer, H. M. R. Hoffmann*, Helv. Chim. Acta 1998, 8, 1429-1438. “1,2-Carbonyl Transposition of a Protected Rubanone. Stereoselective Synthesis of Bicyclic and Tricyclic Lactams derived from Quinidine”. |
8. | Wilfried Braje, Jens Frackenpohl, Peter Langer, H. M. R. Hoffmann*, Tetrahedron 1998, 54, 3495-3512. “The Synthesis of Oxazatwistanes, Homo- and Bishomo-oxazatwistanes from Quinidine. Medium Ring Systems Derived from Cinchona Alkaloids”. |
7. | Peter Langer, Jens Frackenpohl, H. M. R. Hoffmann*, J. Chem. Soc., Perkin Trans 1 1998, 801-806. “Synthesis of Tricyclic N,O-Acetals from α-Functionalized Rubanone. A Masked 1,2,3-Rricarbonyl System from Quinidine”. |
1997 | |
6. | Peter Langer*, Manfred Döring, Helmar Görls, Rainer Beckert, Liebigs Ann./Receuil 1997, 2553-2561. “Regioselective Cyclization Reactions of Ambident Amide Dianions with Oxalic Acid Dielectrophiles”. |
5. | Jörg Wuckelt, Manfred Döring*, Peter Langer, Rainer Beckert, Helmar Görls, TetrahedronLett. 1997, 38, 5269-5272. “Lactam Analogues of Pentalene. A Novel One-Pot Synthesis of Pyrrolo[3,2-b]pyrrole-2,5-diones deriving from Pulvinic Acid”. |
4. | Peter Langer, Dissertation, Universität Hannover, 1997. „Regio- und Diastereoselektive Synthese von Stickstoffhaltigen Naturstoff-Fragmenten, Supramolekularen Heterocyclischen Strukturen und Chinaalkaloiden“. |
3. | Dietmar Seyferth*, Tao Wang, Peter Langer, Robert L. Ostrander, Arnold L. Rheingold, Organometallics 1997, 16, 2413-2426. “Reactions of the 1,1-Diphenylacetone-Derived Dianion as a C,O-Dinucleophile with Organohalosilanes and –germanes”. |
2. | Peter Langer, H. M. R. Hoffmann*, Tetrahedron 1997, 53, 9145-9158. “Diastereocontrol of Nucleophilic Attack of the Rubanone Carbonyl Group via Remote Siloxy Tether. Establishing the Natural Configuration at Carbon C(3) of Cinchona Alkaloids”. |
1995 | |
1. | Dietmar Seyferth*, Peter Langer, Manfred Döring, Organometallics 1995, 14, 4457-4459. “New and Convenient Synthesis of Lithiated Allenes and Ketenimines Based on Readily Available Aryl-Substituted Ketones and Amides”. |