AgNO3 catalyzed cyclization of propargyl-Meldrum’s acids in aqueous solvent: highly selective synthesis of Z-γ-alkylidene lactones
作者:Wei Jia、Si Li、Miao Yu、Wei Chen、Ning Jiao
DOI:10.1016/j.tetlet.2009.07.050
日期:2009.9
γ-Alkylidene lactones have attracted considerable attention due to their diverse biological activities and ubiquitous structural units in natural products. Herein, an efficient AgNO3 catalyzed highly regio- and stereo-selective cyclization of propargyl-Meldrum’s acids in aqueous solvent was developed, which provides a practical synthetic strategy for the synthesis of substituted Z-γ-alkylidene butyrolactones
Copper/Iron-Cocatalyzed Highly Selective Tandem Reactions: Efficient Approaches to<i>Z-</i>γ-Alkylidene Lactones
作者:Si Li、Wei Jia、Ning Jiao
DOI:10.1002/adsc.200800695
日期:2009.3
Abstractmagnified imageInexpensive copper/iron‐cocatalyzed, efficient, highly regioselective and stereoselective one‐pot tandem conjugate addition–cyclization–hydrolysis–decarboxylation reactions have been developed, which provide efficient tandem reactions for CC and CO bond formation, and the novel synthetic methods of γ‐alkylidenebutyrolactones.