US4876399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Taxols, their preparation and intermediates thereof
Assignee: Research Corp Technologies Inc
•
Filing: 1987-11-02
•
Granted: 1989-10-24
•
Expires: 2007-11-02
Abstract
Abstract The present invention is directed to novel taxols useful as a chemotherapeutic agent. Moreover, the present invention is directed to the process of preparing taxols and various intermediates in said process. A key intermediate is this process is 2,5-dihydroxy-2-patchoulenes. Therefore the present invention is also related to said intermediate and the process for its preparation.
Inventors
- 👤 Robert A. Holton
- 👤 Rouh-Rong Juo
- 👤 Richard Lowenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:48
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/45; C07C233/46; C07C233/47; C07C233/49; C07C233/64; C07C233/81; C07C233/82; C07C233/87; C07C35/00; C07C35/22; C07C35/37; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07C2603/00; C07C2603/56; C07C2603/86; C07C2603/90
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A diol of the formula: ##STR10##
Claim 2
Dependent Claim
6 words
A diol of the formula: ##STR10##
Claim 3
Dependent Claim
8 words
The enantiomers of the compound of claim 1.
Claim 4
Dependent Claim
8 words
The diastereomers of the compound of claim 1.
References Cited (Backward Citations)
US3989760A
Cited
US4453000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |