A highly stereoselective synthesis of the C10–C31 (BCDEF ring) portion of pinnatoxin A
作者:Seiichi Nakamura、Jun Inagaki、Tomohiro Sugimoto、Yasuyuki Ura、Shunichi Hashimoto
DOI:10.1016/s0040-4020(02)01380-7
日期:2002.12
An efficient, highly stereoselective synthesis of the C10–C31 (BCDEF ring) portion of pinnatoxin A has been achieved utilizing tandem double hemiketal formation/intramolecular hetero-Michael addition to construct the 6,5,6-dispiroketal (BCD ring) system and subsequent intramolecular ketalization to form the 5,6-bicycloketal (EF ring) system as key steps.
通过串联双半分子形成/分子内杂-迈克尔加成反应构建6,5,6-二螺酮(BCD环)系统和随后的反应,对品纳毒素A的C10–C31(BCDEF环)部分进行了高效,高度立体选择性的合成分子内缩酮化形成5,6-双环缩酮(EF环)系统是关键步骤。