Process for the production of 4,5,6,7-tetrahydrothieno-[3,2-c]-pyridines
US4990618A · kind A · utility
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2Claims
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Key dates
| Filing date | May 2, 1990 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | May 2, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/74
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The following intermediate compounds, namely, 4-Oxo-3-(2-propenyl)-piperidine-3-carboxylic acid ester of the formula: ##STR1## wherein R is hydrogen, a formyl group, an acetyl group or a benzoyl group or is a benzyl group, whose aromatic ring optionally is ring-substituted by at least one halogen atom, and R.sub.1 is an alkyl group with 1 to 4 C atoms. 4-Oxo-3-(2-propenyl)-piperidine of the formula: ##STR2## wherein R is hydrogen, a formyl group, and acetyl group or a benzoyl group or is a benzyl group, whose aromatic ring optionally is ring-substituted by at least one halogen atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.