US3891629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of 6-{8 d-2-amino-2(1,4-cyclo-hexadienyl)acetamido{9 {0 penicillanic acid
Assignee: ER Squibb and Sons LLC
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Filing: 1973-02-16
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Granted: 1975-06-24
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Expires: 1993-02-16
Abstract
Abstract A process for the preparation of 6-(D-2-Amino-2-(1,4cyclohexadienyl)acetamido)penicillanic acid is described utilizing N-(2,2,2-trichloroethyloxycarbonyl-D- Alpha -(1,4cyclohexadien-1-yl)glycine and 6-aminopenicillanic acid, 2,2,2trichloroethyl ester.
Inventors
- 👤 Patrick Andrew Diassi
- 👤 Manmohan Singh Atwal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:05
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 6
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
11 words
A process for the preparation of a compound of the formula
Claim 4
Dependent Claim
11 words
A process for the preparation of a compound of the formula
Claim 5
Dependent Claim
17 words
A process for preparing the compound of claim 1 which comprises reacting a compound of the formula:
Claim 6
Dependent Claim
29 words
The process of claim 3 wherein said acid acceptor is triethylamine, said strong base is benzyldimethylamine, said lower alkyl haloformate is methyl chloroformate and said organic solvent is tetrahydrofuran.
References Cited (Backward Citations)
US3576797A
Cited
US3352858A
Cited
US3549628A
Cited
US3485819A
Cited
US3663563A
Cited
US3539562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |