Process for the preparation of 1,2,3,9-tetrahydro-9-methyl-3-{(2-methyl-1H-imidazol-1-yl)methyl}-4H-carbazol-4-one
US6388091B1 · kind B1 · utility
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1References
9Claims
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Key dates
| Filing date | Nov 20, 2001 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Nov 20, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D403/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Pure -1,2,3,9-tetrahydro-9-methyl-3-[(2-methyl-1H-imidazol-1-yl)methyl]-4H-carbazol-4-one or a pharmaceutically acceptable salt thereof is prepared in a high yield by a simple process which reacts 1,2,3,9-tetrahydro-9-methyl-4H-carbazol-4-one with a 2-methylimidazole derivative in an organic solvent or in a mixture of an organic solvent and water in the presence of a halosilane compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.