5-Cyano-1-hydrocarbylpyrrole-2-acetic acid is converted to 5-acyl-1-hydrocarbylpyrrole-2-acetic acid by reaction with a Grignard reagent followed by hydrolysis. The cyano compound, novel per se, is produced by reacting 1-hydrocarbyl-2-(2',2',2'-trihalo-1'-hydroxyethyl)pyrrole with a cyanating reagent under basic conditions. The latter pyrrole is in turn formed by reacting 1-hydrocarbylpyrrole with trihaloacetaldehyde such as chloral, preferably in the presence of added organic acid catalyst.
5-
氰基-1-烃基
吡咯-2-乙酸经与Grignard试剂反应后
水解,转化为5-酰基-1-烃基
吡咯-2-乙酸。该
氰化化合物本身是新颖的,是通过在碱性条件下将1-烃基-2-(2',2',2'-三卤代-1'-羟基乙基)
吡咯与
氰化试剂反应而制得的。后者的
吡咯则是通过将1-烃基
吡咯与类似
氯醛的三卤代
乙醛反应而制得的,最好是在添加有机酸催化剂的情况下进行。