US3975402A
Expired / Lapsed
US
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Preparation of N-˜(1-ethyl-pyrrolidinyl-2)-methyl]-2-methoxy-5-sulphamoyl-benzamide
Assignee: Renfag SA
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Filing: 1974-06-12
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Granted: 1976-08-17
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Expires: 1994-06-12
Abstract
Abstract N-[(1-ethyl-pyrrolidinyl-2)-methyl]-2-methoxy-5-sulphamoyl-benzamide is prepared by reacting 1-ethyl-2-aminomethyl-pyrrolidine with 2-methoxy-5-sulphamoyl-benzoic acid in the presence of phosphorous trichloride with pyridine as reaction medium.
Inventors
- 👤 Fred Kuenzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:59
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/12; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/553; C07F9/572
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
39 words
Process for preparing N-(1-ethyl-pyrrolidinyl-2)-methyl)-2-methoxy-5-sulphamoyl-benzamide which comprises the steps of reacting an excess of about two mol-equivalents of 1-ethyl-2-aminomethyl-pyrrolidine with one mol-equivalent of phosphorous trichloride in pyridine as the reaction medium and then reacting the resultant product with 2-methoxy-5-sulphamoyl-benzoic acid.
Claim 2
Dependent Claim
39 words
Process for preparing N-(1-ethyl-pyrrolidinyl-2)-methyl)-2-methoxy-5-sulphamoyl-benzamide which comprises the steps of reacting an excess of about two mol-equivalents of 1-ethyl-2-aminomethyl-pyrrolidine with one mol-equivalent of phosphorous trichloride in pyridine as the reaction medium and then reacting the resultant product with 2-methoxy-5-sulphamoyl-benzoic acid.
Claim 3
Dependent Claim
21 words
The process according to claim 1 wherein 11 mol-equivalents of 1-ethyl-2-aminomethyl pyrrolidine is reacted with about 4 mol-equivalents of phosphorous trichloride.
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) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |