Pyridopyrimidine or naphthyridine derivative
US7078522B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2003 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | Dec 1, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P43/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A pyridopyrimidine or a naphthyridine derivative of the formula (I):wherein R1 is an optionally substituted nitrogen-containing heterocyclic group, etc.; R2 is H or a lower alkyl group; R3 is H or an optionally substituted lower alkyl group, etc.; R4 is H, a lower alkyl group, COOH, etc.; R5 is a lower alkyl group which may optionally be substituted by an optionally substituted aryl etc.; one of X and Y is CH and the other is nitrogen, or both of X and Y are nitrogen; or a pharmaceutically acceptable salt thereof, these compounds exhibiting excellent PDE V inhibitory activities, and being useful in the prophylaxis or treatment of penile erectile dysfunction, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.