Cramer et al., Journal of the American Pharmaceutical Association (1912), 1948, vol. 37, p. 439,445
作者:Cramer et al.
DOI:——
日期:——
PROCESS FOR THE PREPARATION OF ALKYL BENZOYLACRYLATES
申请人:Clariant (France) S.A.
公开号:EP1363869A2
公开(公告)日:2003-11-26
[EN] PROCESS FOR THE PREPARATION OF ALKYL BENZOYLACRYLATES<br/>[FR] PROCEDE DE PREPARATION DE BENZOYLACRYLATES D'ALKYLE
申请人:CLARIANT FRANCE SA
公开号:WO2002067847A2
公开(公告)日:2002-09-06
Process for the preparation of alkyl benzoylacrylates of formula (I) where R = alkyl, in which the reaction is carried out in an acid medium in the same reactor, without isolating the intermediate products, as follows: condensation of acetophenone with glyoxylic acid, elimination of a water/acetophenone mixture, elimination of the excess acetophenone, esterification with an alcohol in the presence of a strong acid, addition of a solvent, elimination of a mixture constituted by water, solvent and alcohol, dehydration by azeotropic distillation of the water, neutralization of the strong acid with a basic aqueous solution, decanting and concentration of the organic phase and recovery of the sought final product of formula (I).