Highly Enantioselective Epoxidation of 2, 4??Diarylenones by Using Dimeric Cinchona Phase??Transfer Catalysts: Enhancement of Enantioselectivity by Surfactants

S Jew, JH Lee, BS Jeong, MS Yoo, MJ Kim…

Index: Jew, Sang-Sup; Lee, Jeong-Hee; Jeong, Byeong-Seon; Yoo, Mi-Sook; Kim, Mi-Jeong; Lee, Yeon-Ju; Lee, Jihye; Choi, Sea-Hoon; Lee, Kyungjae; Lah, Myoung Soo; Park, Hyeung-Geun Angewandte Chemie - International Edition, 2005 , vol. 44, # 9 p. 1383 - 1385

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Citation Number: 85

Abstract

Since the asymmetric epoxidation of allylic alcohols, which was reported by the Sharpless group in 1980, catalytic asymmetric epoxidation has been one of the most important asymmetric methodologies.[1] A number of methods have been developed for the epoxidation of both unfunctionalized olefins and electron-deficient enones.[2] Quite recently, catalytic asymmetric phase-transfer epoxidations by using a cinchona alkaloid-derived ...