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).