Patent US3951985A successfully refreshed from Google Patents.
US3951985A
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Lactams and process for their manufacture
Assignee: Grünenthal GmbH
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Filing: 1973-02-27
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Granted: 1976-04-20
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Expires: 1993-02-27
Abstract
Abstract Lactams of the substituted ortho-sulfobenzoic acid imido pyrrolidone-2, piperidone-2, or caprolactam type. The compounds are useful drugs having therapeutical properties. They are immunosuppressive, sedative, and have antitumor activity. They are produced, for instance, by reacting bromo-lactams with a metal salt of o-sulfobenzoic acid imide.
Inventors
- 👤 Ivars Graudums
- 👤 Heinrich Muckter
- 👤 Ernst Frankus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:55
CPC Classifications
C; C07; C07D; C07D417/00; C07D417/02; C07D417/04; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/273; A; A61; A61P; A61P25/00; A61P25/20; C07D211/00; C07D211/04; C07D211/68; C07D211/72; C07D211/74; C07D211/76; C07D275/00; C07D275/04; C07D275/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
32 words
A lactam of the general formula ##SPC7## wherein R is a hydrogen atom or an alkyl radical with 1 to 3 carbon atoms and m represents the numbers 2, 3 or 4.
Claim 2
Dependent Claim
32 words
A lactam of the general formula ##SPC7## wherein R is a hydrogen atom or an alkyl radical with 1 to 3 carbon atoms and m represents the numbers 2, 3 or 4.
Claim 3
Dependent Claim
17 words
The lactam of claim 1 wherein R is hydrogen and m is as defined in claim 1.
Claim 4
Dependent Claim
9 words
The lactam of claim 1 wherein m is 2.
Claim 5
Dependent Claim
9 words
The lactam of claim 1 wherein m is 3.
Claim 6
Dependent Claim
9 words
The lactam of claim 1 wherein m is 4.
Claim 7
Dependent Claim
17 words
The lactam of claim 1 wherein R is alkyl of 1 to 3 and m is 3.
Claim 8
Dependent Claim
10 words
The compoud of claim 1 which is 3-(o-Sulfobenzoic acid imido)-pyrrolidone-2.
Claim 9
Dependent Claim
10 words
The compound of claim 1 which is 3-(o-Sulfobenzoic acid imido)-piperidone-2.
Claim 10
Dependent Claim
10 words
The compound of claim 1 which is Alpha-(o-sulfobenzoic acid imido)-caprolactam.
Claim 11
Dependent Claim
10 words
The compound of claim 1 which is 1-Methyl-3-(o-sulfobenzoic acid imido)-piperidone-2.
Claim 12
Dependent Claim
10 words
The compound of claim 1 which is 1-Ethyl-3-(o-sulfobenzoic acid imido)-piperidone-2.
Claim 13
Dependent Claim
10 words
The compound of claim 1 which is 1-n-Propyl-3-(o-sulfobenzoic acid imido)-piperidone-2.
Claim 14
Dependent Claim
10 words
The compound of claim 1 which is 1-i-Propyl-3-(o-sulfobenzoic acid imido)-piperidone-2.
Claim 15
Dependent Claim
10 words
The compound of claim 1 which is 1-Methyl-3-(o-sulfobenzoic acid imido)-pyrrolidone-2.
References Cited (Backward Citations)
US3314960A
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 |