Efficient kinetic resolution of racemic 3-hydroxy-3-(pentafluorophenyl)-propionitrile (+/-)-1 by a Lipase-catalyzed transesterification gave optically pure (S)3-hydroxy-3-(pentafluorophenyl)propionitrile (S)-1 and (R)-(+)-3-acetoxy-3-(penta-fluorophenyl)propionitrile (R)-1 [>99% ee, respectively, E = 1057], the former of which was further transformed into (S)-(-)-3-amino-1-(pentafluorophenyl)-1-propanol (S)-7 in four steps. (C) 1997 Elsevier Science Ltd.
CHEMOENZYMATIC PROCESS FOR STEREOSELECTIVE PREPARATION OF R- AND S-ENANTIOMERS OF 2-HYDROXY-3-(2-THIENYL) PROPANENITRILE
申请人:Council of Scientific and Industrial Research
公开号:EP1573018B1
公开(公告)日:2009-04-15
Noltes,J.G. et al., Organometallics in Chemical Synthesis, 1970, vol. 1, p. 57 - 68
作者:Noltes,J.G. et al.
DOI:——
日期:——
Pentafluorophenyl carbonyl compounds in the Reformatsky-type reactions promoted with Fe(CO)5-based metal complex systems
Iron pentacarbonyl is an effective promoter for additions of halogenated acid esters and nitriles to pentafluorophenyl carbonyl compounds 1, 4, and 5 by the Reformatsky-type reaction and reductive coupling of compound 1. The electron-withdrawing character of the pentafluorophenyl group has a significant effect on the reaction pathway and the type of the reaction products. The reactions involving metal