申请人:SHIONOGI & CO., LTD.
公开号:EP0658543A1
公开(公告)日:1995-06-21
A process for producing an α-alkoxyiminophenylacetonitrile represented by general formula [III], (wherein R¹, R², R³ and Y are each as defined in the specification) by reacting an alkali metal salt of an α-hydroxyiminophenylacetonitrile, represented by general formula [I], (wherein R¹, R², Y and A are each as defined in the specification) with a dialkyl sulfate represented by the general formula [II]: (R³)₂SO₄, (wherein R³ is as defined in the specification) in the presence of a phase transfer catalyst in a solvent mixture composed of a hydrocarbon solvent and water. It is possible by using the above catalyst and solvent mixture to inhibit the formation of a nitrone derivative as a by-product to thereby produce a highly pure alkoxyimino compound in a high yield.
一种生产通式[III]代表的α-烷氧基亚氨基苯乙腈(其中R¹、R²、R³和Y均如说明书中所定义)的工艺,其方法是将通式[I]代表的α-羟基亚氨基苯乙腈的碱金属盐(其中R¹、R²、Y和A均如说明书中所定义)与通式[II]代表的二烷基硫酸盐反应:(R³)₂SO₄,(其中 R³ 如说明书中所定义)在相转移催化剂存在下,在由烃溶剂和水组成的混合溶剂中进行。通过使用上述催化剂和混合溶剂,可以抑制作为副产物的腈酮衍生物的形成,从而高产率地生产出高纯度的烷氧基亚氨基化合物。