Asymmetric phase-transfer mediated epoxidation of α,β-unsaturated ketones using catalysts derived from Cinchona alkaloids

被引:167
作者
Lygo, B [1 ]
Wainwright, PG [1 ]
机构
[1] Univ Salford, Dept Chem, Salford M5 4WT, Lancs, England
关键词
D O I
10.1016/S0040-4039(97)10779-1
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The enantioselective epoxidation of alpha,beta-unsaturated ketones utilising Cinchona alkaloid-derived quaternary ammonium phase-transfer catalysts bearing an N-anthracenylmethyl function are presented, It has been found that the O-benzyl derivatives of these catalysts in conjunction with sodium hypochlorite give high stereocontrol and application of this process to the enantioselective synthesis of a range of trans-alpha,beta-epoxy ketones (e.e. 69-89%) is presented. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1599 / 1602
页数:4
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