Xanthine derivatives and their use in pharmaceutical compositions
US4454138A · kind A · utility
16Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1982 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Apr 29, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D473/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds of the formula (II): ##STR1## wherein: X is sulphur and Y is oxygen or sulphur; PA0 R.sub.1 is an alkyl group of up to 6 carbon atoms; PA0 R.sub.2 is an alkyl group of up to 6 carbon atoms; and PA0 n is 1; or PA0 X is oxygen and Y is sulphur; one of R.sub.1 and R.sub.2 is an alkyl group of up to 6 carbon atoms and the other is an alkyl group of 2 to 6 carbon atoms; and PA0 n is 1 or 2, having useful pharmacological activity, pro-drugs therefor, a process for their preparation, pharmaceutical compositions containing said compounds or pro-drugs, and intermediates in their preparation of the compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.