US3855243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-aminoacylamino thiophenes
Assignee: Hoechst AG
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Filing: 1973-10-01
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Granted: 1974-12-17
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Expires: 1993-10-01
Abstract
Abstract 3-Aminoacylamino-thiophenes of the formula AND THEIR PHYSIOLOGICALLY TOLERATED SALTS, USEFUL AS LOCAL ANESTHETICS. Methods of making these compounds. In the formula, R1 may be hydrogen, alkyl, hydroxyalkyl, alkoxyalkyl, cycloalkenyl, or alkenyl; R2 is alkyl, hydroxyalkyl, alkoxyalkyl, cycloalkyl, or alkenyl; R1 and R2, taken together, may also form a saturated heterocyclic ring with the nitrogen atom to which they are attached, which ring may also contain an oxygen atom, a methylimino group, or a further nitrogen atom; R3, R4, and R5 are each hydrogen, alkyl, or carbalkoxy; and A is alkylene.
Inventors
- 👤 H Ruschig
- 👤 M Schorr
- 👤 R Muschaweck
- 👤 R Rippel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:15
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/42; C07D333/38; C07D409/00; C07D409/02; C07D409/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
6 words
A SUBSTITUTED 3-AMINOACYLAMINO-THIOPHENYL OF THE FORMULA
Claim 2
Dependent Claim
6 words
A SUBSTITUTED 3-AMINOACYLAMINO-THIOPHENYL OF THE FORMULA
Claim 3
Dependent Claim
9 words
3-n-Propylamino- Alpha -propionylamino-2-carbomethoxy-4-methyl-thiophene and the physiologically tolerated salts thereof.
Claim 4
Dependent Claim
9 words
3-n-Propylamino- Alpha -propionylamino-2-carbomethoxy-4-methyl-thiophene and the physiologically tolerated salts thereof.
Claim 5
Dependent Claim
9 words
3-Diethylamino- Beta -propionylamino-2-carbomethoxy-4-methyl-thiophene and the physiologically tolerated salts thereof.
Claim 6
Dependent Claim
9 words
3-Diethylamino- Beta -propionylamino-2-carbomethoxy-4-methyl-thiophene and the physiologically tolerated salts thereof.
Claim 7
Dependent Claim
9 words
3-n-butylamino- Beta -propionylamino-2-carbomethoxy-4-methyl-thiophene and the physiologically tolerated salts thereof.
Claim 8
Dependent Claim
9 words
3-n-butylamino- Beta -propionylamino-2-carbomethoxy-4-methyl-thiophene and the physiologically tolerated salts thereof.
Claim 9
Dependent Claim
9 words
3-n-butylamino- Alpha -propionylamino-2-carbomethoxy-4-methyl-thiophene and the physiologically tolerated salts thereof.
Claim 10
Dependent Claim
9 words
3-n-butylamino- Alpha -propionylamino-2-carbomethoxy-4-methyl-thiophene and the physiologically tolerated salts thereof.
Claim 11
Dependent Claim
9 words
3-n-propylamino- Beta -propionylamino-2-carbomethoxy-4-methylthiophene and the physiologically tolerated salts thereof.
Claim 12
Dependent Claim
9 words
3-n-propylamino- Beta -propionylamino-2-carbomethoxy-4-methylthiophene and the physiologically tolerated salts thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |