申请人:Labaz
公开号:US04155929A1
公开(公告)日:1979-05-22
Process for the preparation of di-n-propyl acetonitrile of the formula: ##STR1## whereby, in a single step, sodium n-propylate in n-propanol medium is added to a reaction medium which is formed of a cyanacetate of general formula: ##STR2## in which R represents an alkyl radical having from 1 to 4 carbon atoms, and n-propyl bromide or iodide, the alkylation reaction taking place under reflux, the crude ester obtained is saponified with a 10 to 20% solution of sodium hydroxide or potassium hydroxide, the resulting salt is acidified with a strong acid, to give crude di-n-propyl cyanacetic acid, which is decarboxylated by heating at a temperature between 140.degree. C. and 190.degree. C., so as to obtain the di-n-propyl acetonitrile.
制备二丙基乙腈的过程如下:在一个步骤中,将丙醇中的n-丙基钠加入反应介质中,该反应介质由一般式为:##STR2## 的氰乙酸盐和n-丙基溴或碘组成,烷基化反应在回流条件下进行,得到的原始酯用10%至20%的氢氧化钠或氢氧化钾溶液皂化,得到的盐用强酸酸化,得到原始的二丙基氰乙酸,通过在140℃至190℃的温度下加热脱羧,从而得到二丙基乙腈。