Process for preparing 1,2-dihydro-6-methyl-2-oxo-5-(pyridinyl)nicotinonitriles
US4347363A · kind A · utility
5Cited by
2References
3Claims
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Key dates
| Filing date | Sep 17, 1981 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | Sep 17, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D213/85
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing cardiotonically active 1,2-dihydro-6-methyl-2-oxo-5-(pyridinyl)nicotinonitriles which comprises reacting a pyridinylmethyl methyl ketone with ethoxymethylenemalononitrile, where pyridinyl is 4- or 3-pyridinyl or 4- or 3-pyridinyl having one or two lower-alkyl substituents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.