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.
Enantioselective oxidation of sulphides to sulphoxides in the presence of bovine serum albumin.
作者:Stefano Colonna、Nicoletta Gaggero、Mario Leone
DOI:10.1016/s0040-4020(01)96180-0
日期:1991.9
In situ generated dioxiranes oxidize a series of prochiral sulphides to the corresponding sulphoxides with enantiomeric excess (e.e.) up to 89%, when bovineserumalbumin (BSA) is used as chiral auxiliary. The degree of enantioselectivity, as well as yield and reaction times, depend upon the nature of the dioxirane. These are compared with enantioselectivities attainable for the same transformations