Preparation and purification of antiviral disulfonic acid disodium salt
US6960686B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Sep 22, 2004 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | Sep 22, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D251/70
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a new process and intermediates for the production of antiviral compound 4′,4-bis-{4,6-bis-[3-(bis-carbamoyl-methyl-1-sulfamoyl)-phenylamino]-[1,3,5]triazin-2-ylamino}-biphenyl-2,2′-disulfonic acid and its pharmaceutically acceptable salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.