Facile, Highly Stereoselective Synthesis of Cyclopropyl Benzoimidazoles via Cyclopropanation of Olefin with Arsonium Ylides
作者:Weiqi Tong、Changqing Wang、Wenwen Zhao、Jie Chen、Xiaoyu Wu、Min Zhang、Hongmei Deng、Min Shao、Zhongjiao Ren、Weiguo Cao
DOI:10.1080/00397910902778019
日期:2009.9.8
Abstract A facile and highly stereoselective methodology for the preparation of highly functionalized trans-1,2-cyclopropanes containing benzoimidazolyl, cyano, aryl, and carbonyl groups 3 is described. Arsonium bromides 2 reacted with electron-deficient olefins 1 in the presence of KF·2H2O to provide 3 exclusively with high stereoselectivity in moderate to good yields.
摘要描述了一种用于制备含有苯并咪唑基、氰基、芳基和羰基 3 的高度官能化的反式-1,2-环丙烷的简便且高度立体选择性的方法。在 KF·2H2O 存在下,溴化砷 2 与缺电子烯烃 1 反应,以中等至良好的产率专门提供具有高立体选择性的 3。