Enantioselective Synthesis of an Advanced Intermediate for the Synthesis of Brefeldin A and Analogues
作者:André Guingant、Frédéric Legrand、Sylvie Archambaud、Sylvain Collet、Karine Aphecetche-Julienne、Michel Evain
DOI:10.1055/s-2008-1032041
日期:2008.2
A synthesis of methyl (1 R,2 R,4 S)-2-[( E)-2-iodovinyl]-4-(methoxymethoxy)cyclopentanecarboxylate is described in nine steps from a prochiral anhydride. A desymmetrization reaction followed by an epimerization and a Takai reaction are the key steps of the transformation. Based on previous work, this vinylic iodide product should be a useful precursor for the synthesis of brefeldin A and analogues.
(1 R,2 R,4 S)-2-[(E)-2-碘乙烯基]-4-(甲氧基甲氧基)环戊烷羧酸甲酯的合成描述了从前手性酸酐的九个步骤。去对称化反应、差向异构化和 Takai 反应是转化的关键步骤。根据以前的工作,这种乙烯基碘产品应该是合成布雷菲尔德菌素 A 和类似物的有用前体。