作者:David A. Evans、Duke M. Fitch、Thomas E. Smith、Victor J. Cee
DOI:10.1021/ja002356g
日期:2000.10.1
The synthesis of phorboxazole B has been accomplished in 27 linear steps and an overall yield of 12.6%. The absolute stereochemistry of the C4−C12, C33−C38, and C13−C19 fragments was established utilizing catalytic asymmetric aldol methodology, while the absolute stereochemistry of the C20−C32 fragment was derived from an auxiliary-based asymmetric aldol reaction. All remaining chirality was incorporated
佛盒唑B的合成分27个线性步骤完成,总收率为12.6%。C4-C12、C33-C38 和 C13-C19 片段的绝对立体化学是利用催化不对称醛醇方法建立的,而 C20-C32 片段的绝对立体化学来自基于辅助的不对称醛醇反应。所有剩余的手性都是通过内部不对称诱导引入的,除了来自 (R)-三苯甲基缩水甘油的 C43 立体中心。关键片段偶联包括立体选择性双立体分化醛醇反应、金属化恶唑烷基化、恶唑稳定的 Wittig 烯化和完全精心设计的烯基金属侧链的螯合控制添加。