Patent US4420624A successfully refreshed from Google Patents.
US4420624A
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Process for preparing spectinomycin analogs
Assignee: Pharmacia and Upjohn Co
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Filing: 1982-03-17
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Granted: 1983-12-13
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Expires: 2002-03-17
Abstract
Abstract Anomers and asteric mixtures of novel analogs of spectinomycin. Additionally provides novel intermediates and process for preparing spectinomycin and analogs thereof.
Inventors
- 👤 David R. White
- 👤 Richard C. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:28
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/22; C07H15/222; C07H15/224
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
38 words
A process for preparing a compound having the formula ##STR214## which comprises reacting a compound having the formula ##STR215## with hydrogen in the presence of a base wherein R 15 is acyl or hydrogen and CBz is carbobenzyloxy.
Claim 2
Dependent Claim
38 words
A process for preparing a compound having the formula ##STR214## which comprises reacting a compound having the formula ##STR215## with hydrogen in the presence of a base wherein R 15 is acyl or hydrogen and CBz is carbobenzyloxy.
Claim 3
Dependent Claim
11 words
A process according to claim 1 wherein R 15 is hydrogen.
Claim 4
Dependent Claim
11 words
A process according to claim 1 wherein R 15 is acyl.
Claim 5
Dependent Claim
10 words
A process according to claim 3 wherein acyl is acetyl.
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) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |