Process for the preparation of 2-amino-4,5,3',4'-tetramethoxybenzophenone
US6011178A · kind A · utility
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9Claims
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Key dates
| Filing date | Mar 12, 1999 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Mar 12, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C205/45
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-Amino-4,5,3',4'-tetramethoxybenzophenone of the formula: ##STR1## is prepared by mononitration of 3,3',4,4'-tetramethyoxybenzophenone using nitric acid in the presence of acetic acid, and subsequent reduction of the nitro group. The compound is an intermediate in the synthesis of active ingredients against rheumatoid arthritis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.