Pharmacologically active tricyclic quinazolinones
US3969506A · kind A · utility
2Cited by
3References
14Claims
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Assignee
Inventor
Key dates
| Filing date | Feb 26, 1975 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Feb 26, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D239/95
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The compounds are biologically active tricyclic quinazolinones of the class of imidazo[2,1-b]quinazolin-5-ones, pyrimido[2,1-b]quinazolin-6-ones and diazepino[2,1-b]quinazolin-7-ones, useful, for example, as bronchodilator agents. Processes for preparation of said compounds include the reaction of a N-carboxy anthranilic anhydride (an isatoic anhydride) with a cyclic pseudothiourea such as 2-organomercapto-4,5-dihydroimidazole or 2-organomercapto-3,4,5,6-tetrahydropyrimidine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.