Method of producing optically active alpha-hydroxy acid or alpha-hydroxyamide
申请人:NITTO CHEMICAL INDUSTRY CO., LTD.
公开号:EP0711836A1
公开(公告)日:1996-05-15
A reaction system, wherein a cyanohydrin is converted into an optically active α-hydroxy acid or α-hydroxyamide via a treatment in a reaction tank (f) with a microorganism, is provided with an automatic cyanohydrin controller (h) comprising a cyano ion detector (a), a regulator (b) and a cyanohydrin supplier (i) and (j) linked thereto. The reaction is performed while automatically controlling the cyanohydrin concentration.
Thus cyanohydrin can be supplied under automatic control at a relatively low and constant concentration on the basis of its consumption ratio. The reaction rate of the catalyst can be continuously regarded as the rate-limiting factor. As a result, a decrease in the enzymatic activity during the reaction can be suppressed and an optically active α-hydroxy acid or α-hydroxyamide can be efficiently obtained at a high yield.
MEYER, W.;DRABEK, J.;FAROOG, S.;GSELL, L.;KRISTIANSEN, O.
作者:MEYER, W.、DRABEK, J.、FAROOG, S.、GSELL, L.、KRISTIANSEN, O.
DOI:——
日期:——
US5736385A
申请人:——
公开号:US5736385A
公开(公告)日:1998-04-07
Enzymatic preparation of optically active cyanohydrin acetates
作者:Andreas van Almsick、Joachim Buddrus、Petra Hönicke-Schmidt、Kurt Laumen、Manfred P. Schneider
DOI:10.1039/c39890001391
日期:——
A series of cyanohydrinacetates (1)–(47) of widely varying structures, potential chiral building blocks for numerous synthetic applications, has been prepared in good chemical and often high optical yields by enzymatic hydrolysis of their racemic acetates in the presence of an ester hydrolase from Pseudomonas sp.