Process for the preparation of 2,4-diamino-5-benzylpyrimidines
申请人:Societe Anonyme: Sanofi Pharma S.A. - Succursale de Carouge
公开号:US04789743A1
公开(公告)日:1988-12-06
The invention relates to a process for the preparaton of compounds of the formula I by reacting an alkali metal alcoholate with a compound of the formula II in the presence of an aliphatic ester such as methyl formate, and then condensing guanidine with the resulting compound of the formula III. The compound of the formula II can be prepared by reacting the corresponding benzaldehyde with acrylonitrile in the presence of diazabicyclo-2,2,2,-octane. ##STR1##
Process for preparing 2,4-diamino-5-(substituted benzyl)-pyrimidines
申请人:Hoffmann-La Roche Inc.
公开号:US04115650A1
公开(公告)日:1978-09-19
2,4-Diaminopyrimidines bearing a substituted benzyl group in position-1 are prepared from the correspondingly substituted .alpha.-alkoxymethylcinnamonitrile by treatment of the latter with an alkali metal alkoxide in mono-methyl ether of ethylene glycol and subsequently reacting the resulting reaction mixture with guanidine.