Intermediates useful for preparing 4,6-diaminopyrido[5,4-d]pyrimidines
申请人:Boehringer Ingelheim Pharma KG
公开号:US20040059114A1
公开(公告)日:2004-03-25
Intermediates useful for preparing 4,6-diaminopyrimido[5,4-d]pyrimidines, which are themselves useful as inhibitors of signal transduction mediated by tyrosine kinases. The intermediates of the invention are 2-chloro-4,6-diamino-7,8-dihydropyrimido[5,4-d]pyrimidines, protected and unprotected 4-amino-2,6-dichloro-7,8-dihydropyrimido[5,4-d]pyrimidines and 4-amino-2,6,8-trichloropyrimido[5,4-d]pyrimidines.
Process for preparing 4,6-diaminopyrimido[5,4-d]pyrimidines
申请人:Boehringer Ingelheim Pharma KG
公开号:US06680384B2
公开(公告)日:2004-01-20
The present invention relates to a process for preparing 4,6-diaminopyrimido[5,4-d]pyrimidines of formula I,
wherein R1 to R4 have the meanings given in claim 1, as well as new intermediate products which are involved in this process.