发明名称 |
PROCESS FOR PREPARATION OF PYRAZOLO[4,3-D]PYRIMIDIN-7-ONES AND INTERMEDIATES THEREOF |
摘要 |
A process is provided for the preparation of a compound of formulae (IA) (sidenafil/ ViagraTm TM ) and (IB) <CHEM> 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: <CHEM> |
申请公布号 |
HU9903469(A3) |
申请公布日期 |
2000.10.30 |
申请号 |
HU19990003469 |
申请日期 |
1999.10.11 |
申请人 |
PFIZER IRELAND PHARMACEUTICALS PARTNERSHIP, COUNTY DUBLIN |
发明人 |
|
分类号 |
C07D295/22;A61K31/519;A61P15/10;C07D231/40;C07D231/54;C07D295/26;C07D401/02;C07D401/06;C07D487/00;C07D487/04 |
主分类号 |
C07D295/22 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|