Synthesis of Diastereomerically and Enantiomerically Pure 2,3-Disubstituted Tetrahydrofurans Using a Sulfoxonium Ylide
作者:Jennifer M. Schomaker、Veera Reddy Pulgam、Babak Borhan
DOI:10.1021/ja0469075
日期:2004.10.1
via Sharpless asymmetric epoxidation chemistry, offer access to a wide variety of enantiomerically pure compounds. In this communication, we describe the use of a Payne rearrangement to control regioselectivity in the ring-opening of a series of 2,3-epoxy alcohols with dimethylsulfoxonium methylide to yield diastereomerically and/or enantiomerically pure disubstituted tetrahydrofuran rings. The factors
2,3-环氧醇的亲核取代反应可通过 Sharpless 不对称环氧化化学轻松制备,提供了获得多种对映体纯化合物的途径。在这篇通讯中,我们描述了使用 Payne 重排来控制一系列 2,3-环氧醇与二甲基亚砜开环的区域选择性,以产生非对映体和/或对映体纯的双取代四氢呋喃环。讨论了影响 THF 环产品成功和取代模式的因素,包括空间、电子和溶剂效应。