Asymmetric counteranion-directed catalysis for the epoxidation of enals

被引:181
作者
Wang, Xingwang [1 ]
List, Benjamin [1 ]
机构
[1] Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany
关键词
aldehydes; asymmetric epoxidation; chiral phosphates; enals; organocatalysis;
D O I
10.1002/anie.200704185
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
(Chemical Equation Presented) A new mode of chiral anion catalysis: A powerful chiral-counteranion strategy for catalytic asymmetric epoxidations using the newly discovered catalyst 1 has been applied to the epoxidation of α,β-unsaturated aldehydes together with tert-butyl hydroperoxide as the oxidant (see scheme). Remarkably, this system provides the corresponding epoxides in high diastereo- and enantioselectivity for both di- and trisubstituted enals. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.
引用
收藏
页码:1119 / 1122
页数:4
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