Process for preparation of 4H-4-oxo-quinolizine-3-carboxylic acid
US5693813A · kind A · utility
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10Claims
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Key dates
| Filing date | Feb 26, 1997 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Feb 26, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D455/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of a compound having the formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are defined, from an enamine by chain expansion and ring closure followed by additional derivatization, treatment with a 3-alkoxyl-acryloyl compound, another ring closure, and converting a hydroxyl group to a leaving group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.