Cinchona Alkaloid Catalyzed Enantioselective Chlorination of 3-Aryloxindoles
作者:Mei-Xin Zhao、Zhi-Wang Zhang、Ming-Xiao Chen、Wen-Hao Tang、Min Shi
DOI:10.1002/ejoc.201100061
日期:2011.6
O-Benzoylquinidine is an effective organocatalyst for the asymmetric chlorination of 3-aryloxindoles by using easily available N-chlorosuccinimide (NCS) as chlorine source to give the corresponding 3-aryl-3-chlorooxindoles in excellent yields and up to 93 % enantiomeric excess.
Axially chiral BINIM and Ni(II)-catalyzed asymmetric chlorination of 3-substituted oxindoles
作者:De Wang、Jia-Jun Jiang、Rui Zhang、Min Shi
DOI:10.1016/j.tetasy.2011.06.021
日期:2011.5
Axially chiral BINIM-Ni(II) complexes are effective catalysts in the asymmetric chlorination of 3-substituted oxindoles and give the corresponding chlorinated adducts in good yields and up to 88% ee. (C) 2011 Elsevier Ltd. All rights reserved.
Highly Enantioselective Catalytic Fluorination and Chlorination Reactions of Carbonyl Compounds Capable of Two-Point Binding
Chiral Calcium VAPOL Phosphate Mediated Asymmetric Chlorination and Michael Reactions of 3-Substituted Oxindoles
作者:Wenhua Zheng、Zuhui Zhang、Matthew J. Kaplan、Jon C. Antilla
DOI:10.1021/ja109824x
日期:2011.3.16
We disclose a novel high yielding and highlyenantioselectivechiralcalciumVAPOL phosphate-catalyzed chlorination of 3-substituted oxindoles with N-chlorosuccinimide (NCS). The reaction conditions are also shown to be effective for the catalyticenantioselective Michael addition of 3-aryloxindoles to methyl vinyl ketone.