Efficient Construction of Oxa- and Aza-[<i>n</i>.2.1] Skeletons: Lewis Acid Catalyzed Intramolecular [3+2] Cycloaddition of Cyclopropane 1,1-Diesters with Carbonyls and Imines
作者:Siyang Xing、Wenyan Pan、Chang Liu、Jun Ren、Zhongwen Wang
DOI:10.1002/anie.201000563
日期:2010.4.19
Building bridges: A Lewis acid promoted intramolecular [3+2] cycloaddition of cyclopropane 1,1‐diesters with aldehydes, ketones, and imines (see scheme) has been developed to provide a general and efficient strategy for construction of bridged oxa‐ and aza‐[n.2.1] (n=2,3,4) skeletons. To highlight this method, the core of platensimycin was also constructed.
建桥:路易斯酸促进了醛,酮和亚胺的环丙烷1,1-二酯分子内[3 + 2]环加成反应(参见方案),为构建桥联的氧杂和氮杂提供了通用而有效的策略‐ [ n。2.1](n = 2,3,4)骨架。为了突出这种方法,还构建了板霉素的核心。