Asymmetric alkylation of diarylmethane derivatives. Improved results using methoxyethoxy substituent
摘要:
Alkylation of 2-methoxyethoxyphenyl phenyl methane using sec-BuLi and (-)-sparteine has been carried Out in excellent yields and up to 94% cc. The best results were obtained in allylation reactions but methylation, ethylation, benzylation and trimethylsilylation have all been carried out with acceptable cc. (C) 2004 Elsevier Ltd. All rights reserved.
Asymmetric alkylation of diarylmethane derivatives
作者:James A. Wilkinson、Steven B. Rossington、Sylvie Ducki、John Leonard、Nigel Hussain
DOI:10.1016/j.tet.2005.11.044
日期:2006.2
Deprotonation-alkylation of prochiral diarylinethane substrates using sec-BuLi and (-)-sparteine has been carried Out in excellent yields and Lip to 94% ee. A variety of enantioselective alkylations, silylations and stannylations have been performed on four different diarylmethanes. Surrogates for (+)-sparteine have also been applied in this Study including a novel surrogate. (c) 2005 Elsevier Ltd. All rights reserved.