申请人:Bayer Aktiengesellschaft
公开号:US04555370A1
公开(公告)日:1985-11-26
A novel process for the preparation of acyl cyanides of the general formula R--CO--CN (I) wherein R represents an optionally substituted alkyl radical with 1 to 8 carbon atoms, an optionally substituted cycloalkyl radical with 3 to 12 carbon atoms, an optionally substituted aryl radical or an optionally substituted 5-membered or 6-membered heterocyclic radical, which can additionally be fused to a benzene ring, in which a carboxylic acid fluoride or the general formula R--CO--F (II) in which R has the abovementioned meaning is reacted with an alkali metal cyanide, optionally in the presence of a diluent, at a temperature between 10.degree. and 200.degree. C. The acylcyanides (I) can be used as intermediates in the synthesis of known herbicides.
一种制备通式为 R--CO--CN(I)的酰基氰化物的新工艺,其中 R 代表一个可选择取代的含有1至8个碳原子的烷基基团,一个可选择取代的含有3至12个碳原子的环烷基基团,一个可选择取代的芳基基团或一个可选择取代的5-或6-成员杂环基团,该基团还可以与苯环融合,其中一种羧酸氟化物或通式为 R--CO--F(II)的化合物(其中 R 具有上述含义)与一种碱金属氰化物反应,可选择地在存在稀释剂的情况下,在10至200摄氏度之间的温度下进行。酰基氰化物(I)可用作已知除草剂合成中间体。