A process for the preparation of 3-carboxyl-1-methylpyrrol-2-acetic acid of formula (1):
and alkali metal salts thereof, comprises reacting acetone-bicarboxylic acid or an alkali metal salt thereof in an aqueous medium with methylamine and a halo-acetaldehyde, preferably chloroacetaldehyde, at a temperature from about 5°C to about 25°C.
The resulting product is an intermediate suitable for organic syntheses, in particular for the preparation of 5-arylolyl-pyrrol-alkanoic acids which are known anti-inflammatory agents in the pharmaceutical field.
一种制备式(1)的3-羧基-
1-甲基吡咯-2-乙酸及其碱
金属盐的工艺包括
及其碱
金属盐的工艺,包括在
水介质中使
丙酮二
羧酸或其碱
金属盐与
甲胺和卤代
乙醛(最好是
氯乙醛)在约 5°C 至约 25°C 的温度下反应。
所得产物是一种适用于有机合成的中间体,尤其适用于制备 5-芳基-
吡咯-烷酸,这种酸是医药领域已知的抗炎剂。