Process for the preparation of an 8-alkyl-5-oxo-5,8-dihydro-pyrido(2,3-d)pyrimidine-6-carboxylic acid
US4129737A · kind A · utility
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3Claims
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Key dates
| Filing date | Aug 17, 1976 |
| Grant date | Dec 12, 1978 |
| Priority date | — |
| Expiry date | Aug 17, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K31/505
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Valuable antibacterial 8-alkyl-5-oxo-5,8-dihydro-pyrido(2,3-d)pyrimidine-6-carboxylic acids, some of which are new compounds, are made from corresponding pyrimidines by a process involving condensation with an amino-ester, cyclization, halogenation, dehydrohalogenation, and saponification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.