Gajda, Tadeusz, Phosphorus, Sulfur and Silicon and the Related Elements, 1993, vol. 85, # 1-4, p. 59 - 64
作者:Gajda, Tadeusz
DOI:——
日期:——
Synthesis of bifunctional P-chiral hydroxy phosphinates; lipase-catalyzed stereoselective acylation of ethyl (1-hydroxyalkyl)phenylphosphinates
作者:Kosei Shioji、Aya Tashiro、Sanae Shibata、Kentaro Okuma
DOI:10.1016/s0040-4039(02)02716-8
日期:2003.1
Lipase-catalyzed acylation of ethyl (1-hydroxyalkyl)phenylphosphinates afforded a single diastereomer in high enantiomeric excess. The substituent effect of the alkyl group toward the acylation using Candida antractica (CAL) was larger than that of an immobilized lipase from Pseudomonas fluorescens lipase (lipase AK). (C) 2003 Elsevier Science Ltd. All rights reserved.
Simple and effective method for the deracemization of ethyl 1-hydroxyphosphinate using biocatalysts with lipolytic activity
The kinetic resolution of ethyl (1-hydroxyethyl)phenylphosphinate was carried by enzymatic esterification with vinyl butyrate or by hydrolysis of ethyl (1-butyryloxyethyl)phenylphosphinate either by the use of lipases or whole cells of microorganisms (bacteria and fungi). Since no stereodifferentiation of the phosphinate moiety was observed, the biotransformations gave diastereoisomers of ethyl (1-hydroxyethyl)phenylphosphinate with excellent enantiomeric excesses above 98%, while the percentage conversion ranged from 10% to 49% depending upon the procedure and conditions of the biocatalysis. (c) 2006 Elsevier Ltd. All rights reserved.
Enzymatic Resolution of Ethyl α-Hydroxyphosphinates in a Modified Reaction Environment
The enzymatic resolutions of two racemic ethyl hydroxyalkane(P-phenyl)phosphinates were performed by both esterification and hydrolysis approaches. The first reaction was performed in anhydrous diisopropyl ether with triethylamine or pyridine as additives by using lipases from three different sources (Candida cylindracea, Aspergillus niger, and Mucor javanicus). The increase in enantioselectivity was observed when NEt3 was applied. The second reactionlipase-catalysed hydrolysis of ethyl butyryloxyalkane(P-phenyl)phosphinateswas carried out by Candida cylindracea lipase in diisopropyl ether saturated with water or in aqueous solutions containing MgCl2, LiCl, or Triton X-100. The usefulness of biphasic systems consisting of diisopropyl ether and water or aqueous solution of MgCl2, LiCl, or Triton X-100 also were tested. The use of biphasic system in the presence of Triton X-100 resulted in the higher conversion of the substrates.
Majewska; Kafarski; Lejczak, Polish Journal of Chemistry, 2005, vol. 79, # 3, p. 561 - 566