Patent US3689557A successfully refreshed from Google Patents.
US3689557A
Expired / Lapsed
US
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Phenethylamides
Assignee: Wyeth LLC
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Filing: 1969-06-09
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Granted: 1972-09-05
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Expires: 1989-06-09
Abstract
Abstract Novel chloro- or alkoxy-substituted phenethylamides, optionally substituted on the nitrogen by alkyl and containing an alkyl-, an alkanoyloxyalkyl-, a hydroxyalkyl- or a diphenoxyalkylacylamino group (I) are pharmacologically active as bronchodilators and as central nervous system depressants. Compounds (I) are provided by (a) acylating a substituted phenethylamine (II) with a reactive derivative, e.g., halide or anhydride, of an alkanoic, alkanoyloxyalkanoic, hydroxyalkanoic, or diphenoxyalkanoic acid (III) or (b) dealkanoylating an alkanoyloxy alkyl compound (Ia) to provide the corresponding hydroxyalkyl compound (Ib).
Inventors
- 👤 Ronald J Mccaully
- 👤 George L Conklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:27
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A compound as defined in claim 1 in the form of a hydrochloric acid addition salt.
Claim 2
Dependent Claim
2 words
N-(3,4-dimethoxyphenethyl)glyoxylamide, diphenylacetal.
References Cited (Backward Citations)
US3502679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |