Synthesis of the C4–C16 Polyketide Fragment of Portimines A and B
作者:Xiao-Bo Ding、Harry R. M. Aitken、Esperanza S. Pearl、Daniel P. Furkert、Margaret A. Brimble
DOI:10.1021/acs.joc.1c01463
日期:2021.9.17
Stereoselective synthesis of the C4–C16 polyketide fragment of portimines A and B is reported, enabled by our previously established method for the stereoselective synthesis of syn-α,α′-dihydroxyketones. The preparation of this advanced fragment provides insights useful for the total synthesis of portimines A and B. An asymmetric Evans aldol reaction was used to install the C10–C11 adjacent stereogenic
报告了portimine A 和B 的C4-C16 聚酮化合物片段的立体选择性合成,通过我们先前建立的syn -α,α'-二羟基酮立体选择性合成方法实现。这一先进片段的制备为总合成 A 和 B 提供了有用的见解。 在掺入阴丹三酮之前,使用不对称埃文斯羟醛反应安装 C10-C11 相邻的立体中心,然后环氧化和环氧化物开口以形成具有挑战性的syn -α,α'-二羟基酮官能团。