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.
本发明提供了用于制备4,6-二氨基嘧啶并[5,4-d]嘧啶的中间体,这些化合物本身可用作酪氨酸激酶介导的信号转导抑制剂。本发明的中间体包括2-氯-4,6-二氨基-7,8-二氢嘧啶并[5,4-d]嘧啶、保护和非保护的4-氨基-2,6-二氯-7,8-二氢嘧啶并[5,4-d]嘧啶以及4-氨基-2,6,8-三氯嘧啶并[5,4-d]嘧啶。