Process for the preparation of trimethoprim and novel intermediates for use therein
申请人:Farmos-Yhtyma Oy
公开号:EP0067593A1
公开(公告)日:1982-12-22
Trimethoprim, i.e. 5-[(3,4,5-trimethoxyphenyl) methyl]-2,4-pyrimidinediamine of the formula
is advantageously prepared by reacting two moles of 3,4,5-trimethoxybenzaldehyde with 1 mol of 3,3'-(phenylenedi-iminoldipropanenitrile in the presence of an alkaline condensing agent to form a condensation product of formula:
which is then reacted with guanidine to give the compound of formula (I).
三甲氧苄啶,即 5-[(3,4,5-三甲氧基苯基)甲基]-2,4-嘧啶二胺,其化学式为
在碱性缩合剂存在下,将 2 摩尔 3,4,5-三甲氧基苯甲醛与 1 摩尔 3,3'-(苯基亚甲基二丙腈)反应生成式 2,4-嘧啶二胺的缩合产物:
然后与胍反应,得到式(I)化合物。