作者:Taotao Ling、Chinmay Chowdhury、Bryan A. Kramer、Binh G. Vong、Michael A. Palladino、Emmanuel A. Theodorakis
DOI:10.1021/jo0159035
日期:2001.12.1
An enantioselective synthesis of the potent antiinflammatory agent (-)-acanthoic acid (1) is described. The successful strategy departs from (-)-Wieland-Miescher ketone (10), which is readily available in both enantiomeric forms and constitutes the starting point toward a fully functionalized AB ring system of 1. Conditions were developed for a regioselective double alkylation at the C4 center of the
描述了有效的抗炎药(-)-棘酸(1)的对映选择性合成。成功的策略与(-)-Wieland-Miescher酮(10)背离,后者易于以两种对映体形式使用,构成了向完全功能化的AB环系统1的起点。 A环的C4中心,生成化合物32为单个立体异构体。C环1的构建是通过含硫二烯43与甲基丙烯醛(36)之间的Diels-Alder反应完成的,脱硫和进一步官能化后生成合成的棘酸。