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).
A Catalytic Cross‐Olefination of Diazo Compounds with Sulfoxonium Ylides
作者:James D. Neuhaus、Adriano Bauer、Alexandre Pinto、Nuno Maulide
DOI:10.1002/anie.201809934
日期:2018.12.3
A ruthenium‐catalysed cross‐olefination of diazo compounds and sulfoxonium ylides is presented. Our reaction design exploits the intrinsic difference in reactivity of diazo compounds and sulfoxonium ylides as both carbene precursors and nucleophiles, which results in a highly selective reaction.