Total Synthesis of (−)-Cylindrocyclophanes A and F Exploiting the Reversible Nature of the Olefin Cross Metathesis Reaction
作者:Amos B. Smith、Christopher M. Adams、Sergey A. Kozmin、Daniel V. Paone
DOI:10.1021/ja0106164
日期:2001.6.1
and F (1a and 1f) have been achieved. The initial strategy featured the use of a common advanced intermediate to assemble in stepwise fashion the required macrocycle of 1f, exploiting in turn a Myers reductive coupling followed by ring-closing metathesis. In a second-generation strategy, a remarkable cross olefin metathesis dimerization cascade was discovered and exploited to assemble the requisite [7
已实现 C(2)-对称 (-)-cylindrocyclophanes A 和 F(1a 和 1f)的高效全合成。初始策略的特点是使用常见的高级中间体以逐步方式组装所需的 1f 大环,依次利用 Myers 还原偶联,然后进行闭环复分解。在第二代策略中,发现并利用了显着的跨烯烃复分解二聚级联反应,以从二烯基单体组装 1a 和 1f 所需的 [7,7]-对环芳烃大环。成功的合成还包括有效使用 Danheiser 环化来构建用于 Myers 还原偶联和复分解二聚化策略的底物。最后,