| 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 |
SI0994115(T1) |
申请公布日期 |
2005.08.31 |
| 申请号 |
SI19990030773T |
申请日期 |
1999.10.11 |
| 申请人 |
PFIZER IRELAND PHARMACEUTICALS |
发明人 |
DUNN PETER JAMES;LEVETT PHILIP CHARLES |
| 分类号 |
C07D231/40;C07D295/22;C07D401/06;C07D487/04;(IPC1-7):C07D487/04 |
主分类号 |
C07D231/40 |
| 代理机构 |
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