US3770737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrazine derivatives
Assignee: Merck Sharp & Dohme LLC
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Filing: 1970-06-24
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Granted: 1973-11-06
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Expires: 1990-06-24
Abstract
Abstract THE PRESENT 2-SUBSTITUTED IMIDAZOLINES AND 2-SUBSTITUTED3,4,5,6 - TETRAHYDROPYRIMIDINES POSSESS VALUABLE ANTI-DEPRESSANT AND ANTI-INFLAMMATORY PROPERTIES. THE COMPOUNDS ARE PREPARED BY THE CONDENSATION OF AN APPROPRIATELY SUBSTITUTED NITRILE WITH A DIAMINE. FOR EXAMPLE, CONDENSATION OF 2-PYRIDYLBENZYL CYANIDE WITH 1,2-ETHYLENE DIAMINE OR WITH 1,3-PROPYLENE DIAMINE PRODUCES A 2-(2-PYRIDYLBENZYL) IMIDAZOLINE OR A 2-(2-PYRIDYLBENZY)-3,4,5,6-TETRAHYDROPYRIMIDINE.
Inventors
- 👤 L Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:13
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/14; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/54; C07D213/57; C07D213/59; C07D401/02; C07D401/06; C07D403/00; C07D403/02; C07D403/06; C07D409/00; C07D409/02; C07D409/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |