US4510086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2(4-Allylthioazetidin-2-on-1-yl)acetic acid ester compounds
Assignee: Hoechst AG
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Filing: 1983-08-22
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Granted: 1985-04-09
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Expires: 2003-08-22
Abstract
Abstract Compounds of formula <CHEM> are valuable intermediates for the production of 7-oxo-4-thia-1-azabicyclo [3,2,0] hept-ene derivatives.
Inventors
- 👤 Barry C. Ross
- 👤 Graham Johnson
- 👤 Michael A. Yeomans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:46
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/02; C07D513/04; A; A61; A61P; A61P31/00; A61P31/04; C07D205/00; C07D205/02; C07D205/06; C07D205/08; C07D205/09; C07D499/00; C07D499/88; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
A compound of the formula ##STR51## wherein R is a carboxyl esterifying group removable by hydrolysis, photolysis, reduction, or enzyme action without substantial degradation of the rest of the molecule to give the free acid; R 2 is hydrogen, lower alkyl, lower alkoxyalkyl, lower alkanoyloxyalkyl, or tri-lower alkylsilyloxyalkyl; R a , R b , R c , R d , and R e , taken alone, are the same or different and are hydrogen, alkyl or alkenyl having up to 8 carbon atoms, cycloalkyl or cycloalkenyl having up to 18 carbon atoms, halogen, cyano, carboxyl, or carboxyl esterified with an unsubstituted aliphatic alcohol having up to 20 carbon atoms; any two of R a , R b , R c , R d , and R e , taken together with the carbon atom or atoms to which they are attached, may form a cycloaliphatic ring having 3 to 10 carbon atoms, said compound having none, one, or two of such rings present therein; R c is cis or trans with respect to R d ; and R 2 is cis or trans with respect to ##STR52##
Claim 2
Dependent Claim
187 words
A compound of the formula ##STR51## wherein R is a carboxyl esterifying group removable by hydrolysis, photolysis, reduction, or enzyme action without substantial degradation of the rest of the molecule to give the free acid; R 2 is hydrogen, lower alkyl, lower alkoxyalkyl, lower alkanoyloxyalkyl, or tri-lower alkylsilyloxyalkyl; R a , R b , R c , R d , and R e , taken alone, are the same or different and are hydrogen, alkyl or alkenyl having up to 8 carbon atoms, cycloalkyl or cycloalkenyl having up to 18 carbon atoms, halogen, cyano, carboxyl, or carboxyl esterified with an unsubstituted aliphatic alcohol having up to 20 carbon atoms; any two of R a , R b , R c , R d , and R e , taken together with the carbon atom or atoms to which they are attached, may form a cycloaliphatic ring having 3 to 10 carbon atoms, said compound having none, one, or two of such rings present therein; R c is cis or trans with respect to R d ; and R 2 is cis or trans with respect to ##STR52##
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) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |