Derivatives of 4-amino 3-carboxy naphthyridines and their pharmaceutical compositions
US4996213A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Jun 6, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P37/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Compounds represented by the general formula ##STR1## in which R.sub.1 and R.sub.2 are independently selected from hydrogen, C.sub.1 -C.sub.6 alkyl, phenyl or benzyl, or R.sub.1 and R.sub.2 may form together with the nitrogen atom to which they are attached a C.sub.4 -C.sub.8 saturated heterocycle, R.sub.3 and R.sub.4 are independently selected from hydrogen or C hd 1-C.sub.6 alkyl, R.sub.5 is selected from hydrogen or halogen, or C.sub.1 -C.sub.4 alkyl, C.sub.1 -C hd 4 alkoxy, nitro or trifluoromethyl, n is 1, 2 or 3, and one of the symbols A, B, C or D represents N and the others represent CH, as well as the N-oxids and the the pharmaceutically acceptable acid addition salts and their salts with bases. The compounds have nervous system affecting properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.