US3927002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(pyridyl)-N{40 -alkyl-N{40 -(2-alkoxycarbonylbenzenesulfonyl)-glycineamides and derivatives
Assignee: Pfizer Inc
•
Filing: 1974-04-19
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Granted: 1975-12-16
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Expires: 1994-04-19
Abstract
Abstract A process for the synthesis of N-aryl-3,4-dihydro-2-alkyl-4-oxo2H-1,2-benzothiazine-3-carboxamide 1,1-dioxides by treatment of N-aryl-N''-alkyl-N''-(2''alkoxycarbonylbenzenesulfonyl)glycineamides, useful intermediates for said process, with an alkali or alkaline earth metal hydride in a reaction-inert solvent at 50*-150* C., said products being antiinflammatory agents.
Inventors
- 👤 Joseph G Lombardino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:59
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/44; C07D277/46; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/75; C07D279/00; C07D279/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
16 words
A compound of claim 1 wherein X is hydrogen and R2 and R3 are each methyl.
Claim 4
Dependent Claim
9 words
The compound of claim 2 wherein R1 is 2-pyridyl.
Claim 5
Dependent Claim
9 words
The compound of claim 2 wherein R1 is 6-methyl-2-pyridyl.
References Cited (Backward Citations)
US3591584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |