Processes for producing alpha-cyanohydrin esters and alpha-hydroxy acids
申请人:Daicel Chemical Industries, Ltd.
公开号:EP0926134A2
公开(公告)日:1999-06-30
The present invention relates to a process for the preparation of compounds of formula (4) wherein a carbonyl compound of the formula (3) is reacted in the presence of a cyanogenation agent with an enol ester of the formula (1) or with an oxime ester of the formula (2):
wherein R1 through R8 have meanings given in the application.
The compound of formula (4) can be hydrolysed to obtain the corresponding compound of formula (5):
Convenient and efficient conversion of aldehydes to acylated cyanohydrins using tributyltin cyanide as catalyst
作者:Matthias Scholl、Chee-Kiang Lim、Gregory C. Fu
DOI:10.1021/jo00124a052
日期:1995.9
Kinetic resolution of cyanohydrins via enantioselective acylation catalyzed by lipase PS-30
作者:Qing Xu、Xiaohong Geng、Peiran Chen
DOI:10.1016/j.tetlet.2008.08.090
日期:2008.11
By using lipase PS-30 as catalyst, the kinetic resolution of a series of racemic cyanohydrins has been achieved via enantioselective acylation. The values of kinetic enantiomeric ratio (E) reached up to 314. Substituent effect is also briefly discussed. (C) 2008 Elsevier Ltd. All rights reserved.
VAN, ALMSICK ANDREAS;BUDDRUS, JOACHIM;HONICKE-SCHMIDT, PETRA;LAUMEN, KURT+, J. CHEM. SOC. CHEM. COMMUN.,(1989) N8, C. 1391-1393