Electrochemical trifluoromethylation of acrylonitrile and crotonitrile. Preparation of 2,3-bis(2,2,2-trifluoroethyl)succinonitrile and 3,4-dicyano-2,5-bis(trifluoromethyl)-n-hexane
作者:Wojciech Dmowski、Albert Biernacki、Tomasz Kozlowski、Przemyslaw Gluziński、Zofia Urbańczyk-Lipkowska
DOI:10.1016/s0040-4020(97)00115-4
日期:1997.3
Electrooxidation of trifluoroacetic acid int he presence of acrylonitrile in an acetonitrile-water solution followed by simple steam distillation of the reaction mixture, provided almost pure 2,3-bis(2,2,2-trifluoroethyl)succinonitrile in a 20 - 25% yield and in a 1:1 diastereoisomers ratio. The meso isomer has been isolated and its structure confirmed by X-ray analysis. Similarly, the reaction in the presence of crotonitrile gave a diastereoisomeric mixture of 3,4-dicyuano-2,5-bis(trifluoromethyl)-n-hexanes albeit in lower yield. (C) 1997 Elsevier Science Ltd.