US3952017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricyclic compounds
Assignee: Hoffmann La Roche Inc
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Filing: 1974-08-30
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Granted: 1976-04-20
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Expires: 1994-08-30
Abstract
Abstract 1-Methyl(or acetyl)-5H-dibenzo[a,d]cycloheptenes and 1-methyl(or acetyl)-10,11-dihydro-5H-dibenzo[a,d]cycloheptenes bearing a basic side chain at the 5-position, such as a 3-mono- or dimethylaminopropylidene, a 3-mono- or dimethylaminopropyl or a 3-dimethylaminopropylidene(or propyl)-N-oxide, intermediates and processes for their preparation, are described. The end products are useful antidepressants.
Inventors
- 👤 Emilio Kyburz
- 👤 Hans Spiegelberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:57
CPC Classifications
C; C07; C07C; C07C63/00; C07C63/33; C07C63/331; C07C13/00; C07C13/28; C07C13/32; C07C13/54; C07C13/547; C07C65/00; C07C65/32; C07C65/38; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/30; C07C2603/32
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
33 words
A compound of the formula ##SPC13## wherein R 1 is hydrogen or methyl; X is ethylene or vinylene, and R' is a ketalized acetyl group, or its N-oxide when R 1 is methyl.
Claim 2
Dependent Claim
33 words
A compound of the formula ##SPC13## wherein R 1 is hydrogen or methyl; X is ethylene or vinylene, and R' is a ketalized acetyl group, or its N-oxide when R 1 is methyl.
Claim 3
Dependent Claim
21 words
A compound in accordance with claim 1, wherein R' is 2-methyl-1,3-dioxolan-2-yl, R 1 is methyl and X is ethylene, i.e., 1-(2-methyl-1,3-dioxolan-2-yl)-10,11-dihydro-5-(3-dimethylaminopropyl)-5-hydroxy-5H-dibenzo[a,d]cycloheptene.
References Cited (Backward Citations)
US3454643A
Cited
US3884967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |