申请人:SHIONOGI & CO., LTD.
公开号:EP0658542A1
公开(公告)日:1995-06-21
A process for producing an α-hydroxyiminophenylacetonitrile represented by general formula [II], (wherein R¹, R², R³ and Z are each as defined in the specification) by reacting a crude nitrile containing a phenylacetonitrile represented by general formula [I], (wherein R¹, R², R³ and Z are each as defined in the specification) with an alkyl nitrite in the presence of a base, extracting the reaction mixture with water, and neutralizing the separated water layer with an acid. This process enables target α-hydroxyiminophenylacetonitriles to be readily produced in a highly pure form in high yield by extracting the reaction mass with water and neutralizing the separated water layer with an acid.
一种生产通式[II]代表的α-羟基亚氨基苯乙腈(其中R¹、R²、R³和Z均如说明书中所定义)的工艺,其方法是在碱存在下,使含有通式[I]代表的苯乙腈(其中R¹、R²、R³和Z均如说明书中所定义)的粗腈与亚硝酸烷基酯反应,用水萃取反应混合物,并用酸中和分离出的水层。该工艺可通过用水萃取反应物并用酸中和分离出的水层,以高纯度、高收率的形式生产目标α-羟基亚氨基苯乙腈。