Penicillins substituted with heterocyclic and substituted phenyl groups
US3992371A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1974 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | Dec 24, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D499/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel penicillins of the formula ##SPC1## Wherein ##EQU1## represents a substituted or unsubstituted benzene or nitrogen atom-containing heteroaromatic ring which may be substituted, ##EQU2## represents a pyridine, pyrazine or pyridazine ring, X represents an oxygen or sulfur atom, Y represents a hydrogen atom or a loer alkoxycarbonyl or lower alkanoyl group, and R.sub.1, R.sub.2 and R.sub.3 are each a hydrogen or halogen atom or a nitro, lower alkylamino, di(lower)alkylamino, aine, lower alkoxycarbonylamino, lower alkanoylamino, amino(lower)alkyl, lower alkyl, lower alkoxy, hydroxyl, sulfamoyl, trifluoromethyl, lower alkylthio or lower alkylsulfonyl group, excluding the cases where all of R.sub.1, R.sub.2 and R.sub.3 are hydrogen atoms and where R.sub.1 is a hydroxyl group and R.sub.2 and R.sub.3 are each a hydrogen or halogen atom, and their nontoxic, pharmaceutically acceptable salts, which can be prepared by reacting a carboxylic acid of the formula: ##EQU3## wherein ##EQU4## X and Y are each as defined above or its reactive derivative with a compound of the formula: ##SPC2## Wherein R.sub.1, R.sub.2 and R.sub.3 are each as defined above or its reactive derivative, and are uefu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.