Pyrazinoisoquinolines as anthelmintic agents
US3993760A · kind A · utility
2Cited by
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10Claims
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Assignee
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Key dates
| Filing date | Jun 21, 1974 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Jun 21, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D217/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
(-)-2-Benzoyl-4-oxo-1,2,3,6,7,11b-hexahydro-4H-pyrazino[2,1-a]isoquinoline is prepared by benzoylation of (-)-4-oxo-1,2,3,6,7,11b-hexahydro-4H-pyrazino[2,1-a]isoquinoline, or cyclization of a compound of the formula ##SPC1## Wherein X is F, Cl, Br, I or O-tosyl and which has the optical configuration of the final product, or cyclization of a compound of the formula ##SPC2## wherein Y is OH, alkoxy, F, Cl, Br or I under HY-removing reaction conditions and which has the optical configuration of the final product, which is an anthelmintic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.