A stereocontrolled total synthesis of six lipoxin B isomers are described. The flexible and stereoselective strategy involves Sharpless asymmetic epoxidation and pinylborane asymmetic reduction to secure the three hydroxyl-bearing stereocenters and a Wittig-type as well as palladium(0)-copper(I) coupling reactions to construct the carbon skeleton of the target molecules.
本文描述了六种脂质素B异构体的立体选择性全合成。该灵活且立体选择性的策略涉及Sharpless不对称环
氧化和庚基
硼烷不对称还原,以确保三个羟基-bearing 立体中心,以及Wittig类型反应和
钯(0)-
铜(I)偶联反应,以构建目标分子的
碳骨架。