Enantioselective Total Synthesis of Isoedunol and β-Araneosene Featuring Unconventional Strategy and Methodology
作者:Jason S. Kingsbury、E. J. Corey
DOI:10.1021/ja055137+
日期:2005.10.1
A new synthetic strategy for the enantioselective synthesis of members of the dolabellane family of marine natural products has been demonstrated for the specific examples beta-araneosene and isoedunol (1 and 2, respectively) by the pathway outlined in Scheme 1. Key steps include (1) diastereoselective alkylation of Seebach's chiral lactate acetal (6) by the iodide derived from 5; (2) Kulinkovich ethylenation
通过方案 1 中概述的途径,已针对特定实例 β-芳烃油烯和异丁烯醇(分别为 1 和 2)证明了一种用于对映选择性合成海洋天然产物多标签烷家族成员的新合成策略。关键步骤包括(1 ) 来自 5 的碘化物对 Seebach 手性乳酸缩醛 (6) 进行非对映选择性烷基化;(2)酯9的Kulinkovich乙烯化形成环丙醇10;(3) 10 的环膨胀形成 11;(4)频哪醇环化酮醛12形成13a;(5) 13b 到 14 的重排;(6) 14 比 2 的丙烯酰化;(7) 还原 pi 转座形成 1。