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.
A facile chemoenzymatic route to enantiomerically pure oxiranes: building blocks for biologically active compounds
作者:Ulrich Goergens、Manfred P. Schneider
DOI:10.1039/c39910001064
日期:——
The enantiomerically purebuildingblocks (R)-and (S)-1–4 were prepared both by enantioselective, enzymatic hydrolysis and by acyl transfer, and subsequently converted into the corresponding enantiomerically pure oxiranes (R)- and (S)-7 and 8.
Chemoenzymatic Cascades for the Enantioselective Synthesis of β‐Hydroxysulfides Bearing a Stereocentre at the C−O or C−S Bond by Ketoreductases
作者:Fei Zhao、Kate Lauder、Siyu Liu、James D. Finnigan、Simon B. R. Charnock、Simon J. Charnock、Daniele Castagnolo
DOI:10.1002/anie.202202363
日期:2022.8
Four ketoreductases (KREDs) were identified for the enantioselectivesynthesis of β-hydroxysulfides. KRED311 and KRED349 catalyse the synthesis of β-hydroxysulfides bearing a stereocentre at the C−Obond with opposite absolute configurations via chemoenzymaticcascades from thiophenols/thiols and α-haloketones/alcohols. KRED253 and KRED384 catalyse the synthesis of β-hydroxysulfides bearing a stereocentre