Preparation of derivative of 3-sulfonamido-4-phenylaminopyridine
US6593475B1 · kind B1 · utility
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19Claims
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Assignee
Inventors
Key dates
| Filing date | Nov 14, 2002 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Nov 14, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D213/74
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to the preparation of 3-sulfonamido-4-arylaminopyridines by heating a 3-sulfonamido-4-aminopyridine with an aryl halide in the presence of an alkaline compound, a copper-containing agent and in the presence of a polar protic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.