申请人:Hoechst Aktiengesellschaft
公开号:US04691022A1
公开(公告)日:1987-09-01
The invention relates to a process for the preparation of compounds of the formula I ##STR1## in which R represents hydrogen, alkyl or aralkyl, and R.sup.1 to R.sup.6 denote identical or different radicals hydrogen, alkyl, cycloalkyl, cycloalkylalkyl, cycloalkenylalkyl, aralkyl or aryl, both being monosubstituted, disubstituted or trisubstituted in the aryl moiety by alkyl, alkoxy, hydroxyl, halogen, nitro, methylenedioxy and/or cyano, or in which two of the radicals R.sup.1 to R.sup.6, together with the carbon atom(s) bearing them form a monocyclic or bicyclic ring system, and the remaining radicals are hydrogen, which process comprises converting, with an oxidizing agent in the presence of a silver salt, a pyrrolidine derivative of the formula II into a .DELTA..sup.1 -pyrroline derivative of the formula III, reacting the latter with hydrogen cyanide or a metal cyanide to form a nitrile of the formula IV, and subjecting the latter to solvolysis with a compound of the formula ROH.
该发明涉及一种制备公式I化合物的过程,其中R代表氢,烷基或芳基烷基,R.sup.1至R.sup.6表示相同或不同的基团,是氢,烷基,环烷基,环烷基烷基,环烯基烷基,芳基烷基或芳基,两者在芳基部分被烷基,烷氧基,羟基,卤素,硝基,亚甲二氧基和/或氰基单取代,双取代或三取代,或其中R.sup.1至R.sup.6的两个基团与它们所带的碳原子形成单环或双环环系,其余基团是氢,该过程包括在银盐存在下,使用氧化剂将公式II的吡咯烷衍生物转化为公式III的.DELTA..sup.1-吡咯烯衍生物,将后者与氰化氢或金属氰化物反应形成公式IV的腈,然后使用公式ROH的化合物进行溶剂解。