Effects of additional stereogenic centres and cation in the nucleophilic epoxidation of vinylsulfoximines with metal alkylperoxides
作者:Andrew D. Briggs、Richard F.W. Jackson、William Clegg、Mark R.J. Elsegood、Josephine Kelly、Paul A. Brown
DOI:10.1016/0040-4039(94)85048-8
日期:1994.9
Epoxidation of vinylsulfoximines using metal alkylperoxides proceeds with varying degrees of stereoselectivity, depending both on the metal cation and the steric bulk of the alkyl group. The stereochemical outcome of the epoxidation of substrates bearing an allylic asymmetric centre is also dependent on the epoxidising agent, and very high levels of stereoselectivity may be obtained in the formation
使用金属烷基过氧化物进行乙烯基亚砜肟的环氧化,其立体选择性的变化程度不同,这取决于金属阳离子和烷基的空间体积。具有烯丙基不对称中心的底物的环氧化的立体化学结果也取决于环氧化剂,并且在磺酰环氧乙烷6a的形成中可以获得非常高水平的立体选择性。该环氧乙烷随后被转化为磺酰基环氧乙烷13,其为有用的手性官能化的酰基阴离子当量的前体。