Process for preparation of pyrazolo[4,3-d]pyrimidin-7-ones and intermediates thereof
申请人:Pfizer Inc.
公开号:US06207829B1
公开(公告)日:2001-03-27
A process is provided for the preparation of a compound of formulae (IA) (sidenafil) and (IB)
comprising reacting a compound of formula (IIA) and (IIB) respectively in the presence of —OR, wherein R in the case of formation of compound (IA) is CH2CH3 and R in the case of formation of compound (IB) is CH2CH2CH3, where X is a leaving group:
提供一种用于制备化合物(IA)(西地那非)和(IB)的方法,包括在存在—OR的情况下分别使化合物(IIA)和(IIB)反应,其中在形成化合物(IA)的情况下,R为CH2CH3,在形成化合物(IB)的情况下,R为CH2CH2CH3,其中X是一个离去基团。