Synthesis of the Spirofungin A Core via a Domino Strategy Consisting of Olefinic Ester Ring-Closing Metathesis and Iodospiroacetalization
作者:Martin Maier、Jochen Neumaier
DOI:10.1055/s-0030-1259287
日期:2011.1
Olefination of ester 26 which was obtained from acid 20 and alkenol 25 using a reduced titanium ethylidene reagent led to cyclic enol ether 28 which could be cyclized by iodospiroacetalization to the spiroacetal core of the antifungal compound spirofungin A (5).
使用还原钛亚乙基试剂对酸 20 和烯醇 25 生成的酯 26 进行烯化反应,可生成环状烯醇醚 28,该环状烯醇醚 28 可通过碘螺缩醛环化成抗真菌化合物螺环菌素 A 的螺缩醛核心 (5)。