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.