Industrial process for the synthesis of isobutyl methyl 1,4-dihydro-2,6-dimethyl-4-(2-nitrophenyl)-3,5-pyridine dicarboxylate (nisoldipine)
US7060838B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Jun 26, 2003 |
| Grant date | Jun 13, 2006 |
| Priority date | — |
| Expiry date | Jun 26, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/90
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Synthetic process of isobutyl methyl 1,4,-dihydro-2,6-dimethyl-4-(2-nitrophenyl)3,5-pyridine dicarboxylate (Nisoldipine) comprising on the reaction of isobutyl 2-(2-nitrobenzylidene)acetoacetate with methyl 3-aminocrotonate in an apolar solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.