Enantioselective synthesis of δ-/γ-alkoxy-β-hydroxy-α-alkyl-substituted Weinreb amides via DKR–ATH: application to the synthesis of advanced intermediate of (−)-brevisamide
作者:Gullapalli Kumaraswamy、Akula Narayana Murthy、Vykunthapu Narayanarao、Sahithya Phani Babu Vemulapalli、Jagadeesh Bharatam
DOI:10.1039/c3ob41088a
日期:——
A method of preparing stereodefined δ-/γ-alkoxy-β-hydroxy-α-alkyl-substituted Weinreb amides containing two successive hydroxyl-alkyl stereocenters has been developed. Further, this strategy coupled with organo-catalyzed asymmetric epoxidation culminates in the synthesis of a critical intermediate of (â)-brevisamide and its diastereomers.
一种制备立体定义的δ-/γ-烷氧基-β-羟基-α-烷基取代的温雷布酰胺的方法已经开发出来。此外,该策略结合了有机催化的不对称环氧化反应,最终合成了(â)-布雷维酰胺及其二叠体的关键中间体。