申请人:Hoechst Aktiengesellschaft
公开号:US04266066A1
公开(公告)日:1981-05-05
Ketones are prepared by reacting carboxylic acid halides, in particular carboxylic acid chlorides, with aluminum-alkyl compounds, optionally in the presence of an aluminum trihalide, in methylene chloride as the solvent, at a temperature between about 20.degree. and about 100.degree. C., preferably between about 30.degree. and about 60.degree. C., more preferably of about 40.degree. C. which is the reflux temperature of the methylene chloride. When operating at a temperature above approximately 40.degree. C., pressure higher than atmospheric is applied. The reaction mixture is worked up in usual manner, suitably by decomposition with water followed by distillation.
酮类化合物是通过将羧酸卤化物,特别是羧酸氯化物,与铝烷基化合物反应制备的,可选地在三卤化铝的存在下,在甲基氯中作为溶剂,在大约20度至大约100度C之间的温度下进行,最好在大约30度至大约60度C之间,更好地在大约40度C左右进行,这是甲基氯的回流温度。在操作温度高于约40度C时,施加高于大气压的压力。反应混合物通常按惯例处理,适当地通过水解后进行蒸馏。