Process for the preparation of 3-carboxy-1-methylpyrrol-2-acetic-acid and alkali metal salts thereof
申请人:Montedison S.p.A.
公开号:EP0105664A1
公开(公告)日:1984-04-18
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。