Method for producing lamotrigine from &agr;-oxo-2,3-dichlorophenyl acetamidino-aminoguanidino hydrazone by ring closure reaction
US6683182B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | May 15, 2003 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | May 15, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C291/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a method for producing 3,5-diamino-6-(2,3-dichlorophenyl)-1,2,4-triazine (lamotrigine) by cyclization reaction from &agr;-oxo-2,3-dichlorophenylacetamidino-aminoguanidino-hydrazone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.