Determination of Absolute Configuration Using Kinetic Resolution Catalysts
作者:Alexander J. Wagner、Jonathan G. David、Scott D. Rychnovsky
DOI:10.1021/ol201902y
日期:2011.8.19
A new method was developed to assign the absoluteconfiguration of molecules using kinetic resolution catalysts. Secondary alcohols were acylated in the presence of Birman’s S-HBTM and R-HBTM catalysts, and the fast-reacting catalyst was identified by NMR analysis of the reaction mixture. A mnemonic was developed to assign configuration based on the identity of the fast-reacting catalyst. The method
Highly efficient synthesis of chiral β-hydroxy sulfides with high enantiomeric purity via CBS-oxazaborolidine-catalyzed borane reduction
作者:Byung Tae Cho、Ok Kyoung Choi、Dong Jun Kim
DOI:10.1016/s0957-4166(02)00193-3
日期:2002.5
A simple and efficient synthesis of chiral beta-hydroxy p-tolylsulfides with high enantiomeric purity by CBS-oxazaborolidine-catalyzed asymmetric borane reduction of beta-keto p-tolyisulfides using N-ethyl-N-isopropylaniline-borane complex as the borane carrier is reported. (C) 2002 Elsevier Science Ltd. All rights reserved.