Process for the synthesis of N-nacyl-2-amino-4-alkoxy-5-nitrobenzoic acids
US7227037B2 · kind B2 · utility
1Cited by
1References
2Claims
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Key dates
| Filing date | Feb 5, 2003 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Feb 20, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D215/54
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention claimed herein provides a process to oxidize N-(5-alkoxy-2-methyl-4-nitrophenyl)acetamides to N-acyl-2-amino-4-alkoxy-5-nitrobenzoic acids using potassium permanganate in the presence of magnesium sulfate in aqueous sulfolane or aqueous pyridine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.