Anti-arthritic 1H-pyrimido-(5,4,3-kl)phenothiazine-1,3(2H)-diones and 1-thiones
US3962438A · kind A · utility
4Cited by
1References
12Claims
0Family size
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Key dates
| Filing date | Jan 7, 1975 |
| Grant date | Jun 8, 1976 |
| Priority date | — |
| Expiry date | Jan 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D279/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
1H-Pyrimido[5,4,3-kl]phenothiazine-1,3(2H)-diones are prepared from the corresponding 1-thione-3-one compounds by methylation followed by acid hydrolysis. The 1,3-dione products and 1-thione-3-one intermediates are useful as anti-arthritic agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.