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
γ-亚烷基内酯由于其多样的生物活性和天然产物中普遍存在的结构单元而引起了相当大的关注。在此,开发了一种有效的AgNO 3在水性溶剂中催化炔丙基-麦德鲁姆酸的高度区域和立体选择性环化的方法,为在中性反应条件下合成取代的Z -γ-亚烷基丁内酯提供了实用的合成策略。