| 发明名称 |
A process for preparation of 5-Ä2-ethoxy-5-(4-methylpiperazin-1-ylsulphonyl)phenylÜ-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazoloÄ4,3-dÜpyrimidin-7-oneÄsildenafilÜ |
| 摘要 |
<p>A process for the preparation of a compound of formula (I): <CHEM> also knows as sildenafil which comprises cyclisation of a compound of formula (II): <CHEM></p> |
| 申请公布号 |
IN187318(B) |
申请公布日期 |
2002.03.23 |
| 申请号 |
IN2001DE00518 |
申请日期 |
2001.04.24 |
| 申请人 |
PFIZER RESEARCH AND DEVELOPMENT COMPANY, N.V. S.A. |
发明人 |
DUNN PETER JAMES;WOOD ALBERT SHAW |
| 分类号 |
C07D295/22;A61K31/00;A61K31/505;A61K31/519;A61K31/635;A61P13/02;A61P15/00;A61P15/10;C07B61/00;C07D;C07D231/14;C07D231/40;C07D295/26;C07D403/12;C07D487/04;(IPC1-7):A61K31/00 |
主分类号 |
C07D295/22 |
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