作者:Satyanarayana Nyalata、Sadagopan Raghavan
DOI:10.1021/acs.orglett.9b02729
日期:2019.10.4
disclosed using an α-chloro sulfide for C–C bond formation. The key intermediate, an α,β-unsaturated ketone, is revealed by a [2,3] sigmatropic rearrangement of a propargylic sulfoxide. Three disparate approaches are detailed to create the C25 carbinol stereocenter. The cis-2,6-disubstitution of the THP ring is secured by ionic hydrogenation. A cross-metathesis reaction and Julia–Kocienski olefination
公开了一种使用α-氯硫化物形成CC键的方法,向立体霉素A的C16-C37片段汇合的立体选择性途径。炔丙基亚砜的[2,3]σ重排揭示了关键中间体α,β-不饱和酮。详细介绍了创建C25甲醇立体中心的三种不同方法。通过离子氢化来确保THP环的顺式-2,6-二取代。交叉复分解反应和Julia-Kocienski烯化反应提供了sorangicin A的C16-C37片段。