Candida Rugosa lipase-catalyzed kinetic resolution of β-hydroxy-β-arylpropionates and δ-hydroxy-δ-aryl-β-oxo-pentanoates
作者:Chengfu Xu、Chengye Yuan
DOI:10.1016/j.tet.2004.12.059
日期:2005.2
A simple and convenient method was reported for the preparation of optically active beta-hydroxy-beta-arylpropionates, delta-hydroxy-delta-aryl-beta-oxo-pentanoates and their butyryl derivatives via CRL-catalyzed hydrolysis. The optically active products are potential precursors of some chiral pharmaceuticals and natural products. (C) 2005 Elsevier Ltd. All rights reserved.
Double Reformatsky Reaction: Divergent Synthesis of δ-Hydroxy-β-ketoesters
A noteworthy feature of the reaction system is its high tolerance of functional groups due to the moderate nucleophilicity of organozinc reagents and the mild reaction conditions. Moreover, spectroscopic and crystallographic analyses of the zinc complex of the double Reformatsky product support the proposed mechanism of reaction site discrimination for ketones, aldehydes, nitriles, carboxylic acid anhydrides
A Chemoenzymatic Approach to Optically Active 5-Hydroxy-3-oxo-carboxylates
作者:Chengye Yuan、Chengfu Xu、Yonghui Zhang
DOI:10.1055/s-2004-817746
日期:——
Enzymatic hydrolysis was applied to the preparation of certain chiral 5-hydroxy-3-oxo-carboxylates that are potential precursors for natural product synthesis via the formation of lactone derivatives and tetrahydropyran rings.