Abstract: The cyclization of 1,1-diacylcyclopropanes with free and masked dianions provides spirocyclopropanes which readily undergo ring-cleavage reactions. Cyclopropylated 1,3,5-tricarbonyl compounds were prepared for the first time. Based on this work also other syntheses of cyclopropanes were developed.

Review: Synlett 2023, 34, 1765-1776.

Period of investigation: 2002 - 2011

Keywords: cyclopropanes; cyclizations; dianions; 1,3-dicarbonyl compounds