Pyridazinone derivatives
US5110925A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1989 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Oct 4, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D237/36
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a compound having the formula below which have an excellent cardiotonic action: ##STR1## wherein Y represents C.sub.1-4 alkylene which may be substituted by C.sub.1-18 alkyl, C.sub.1-5 alkoxy, C.sub.1-5 alkylthio C.sub.1-5 alkyl, C.sub.1-5 alkoxycarbonyl or benzyl, or ##STR2## where each r.sup.1 and r.sup.2 represents hydrogen, C.sub.1-18 alkyl, C.sub.1-5 alkoxy, C.sub.1-5 alkylthio C.sub.1-5 alkyl, C.sub.1-5 alkoxycarbonyl or benzyl); and PA1 R.sub.1 represents hydrogen, C.sub.1-5 alkyl which may be substituted by C.sub.1-5 alkoxy, acetyl or C.sub.2-5 alkenyl; and PA1 R.sub.2 represents hydrogen or methyl; and PA1 each R.sub.3 and R.sub.4 represents hydrogen, halogen, hydroxy, C.sub.1-5 alkyl, or C.sub.1-5 alkoxy; and PA1 R.sub.5 represents hydrogen or C.sub.1-5 alkyl which may be substituted by hydroxy; and PA1 R.sub.4 and R.sub.5 may form ring by joining each other; and represents single or double bond.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.