The dialkylation and cycloalkylation reactions of active methylene compounds in the presence of readily available imidazolium salts (ionic liquids) as phase transfer catalysts were performed to afford the respective dialkylated or cycloalkylated products. This method is very efficient for the synthesis of 1,1-disubstituted derivatives and cyclopropane and cyclopentane ring systems in a facile manner
<i>cis</i>-Selective Single-Cleavage Skeletal Rearrangement of 1,6-Enynes Reveals the Multifaceted Character of the Intermediates in Metal-Catalyzed Cycloisomerizations
作者:Eloísa Jiménez-Núñez、Christelle K. Claverie、Christophe Bour、Diego J. Cárdenas、Antonio M. Echavarren
DOI:10.1002/anie.200803269
日期:2008.9.29
Ginsburg,H. et al., Comptes Rendus des Seances de l'Academie des Sciences, Serie C: Sciences Chimiques, 1970, vol. 270, p. 1415 - 1418