A novel route to enantiopure cyclopentene carboxylic acids based on 3-endo-bromocamphor
作者:Antonio Garcı́a Martı́nez、Enrique Teso Vilar、Amelia Garcı́a Fraile、Santiago de la Moya Cerero、Beatriz Lora Maroto
DOI:10.1016/s0957-4166(01)00039-8
日期:2001.2
A novel four-step synthetic route to enantiopure cyclopentene carboxylic acids starting from commercially available 3-endo-bromocamphor is described. The synthesis is straightforward and practical. The key transformations involve firstly, an enantiospecific Wagner–Meerwein rearrangement of a bromocamphor derived cyanohydrin, and secondly the regiospecific C-(1)C-(2) bond scission of a 7-bromonorbornan-2-one
描述了从市售的3-内-溴樟脑开始的对映体纯的环戊烯羧酸的新颖的四步合成路线。该综合是简单而实用的。关键的转变首先涉及溴代樟脑衍生的氰醇的对映体特异性Wagner-Meerwein重排,其次是7-bromonorbornan-2-one的区域特异性C-(1)C-(2)键断裂。