US3036129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 7-halo-6-deoxy-tetracyclines
Assignee: Wyeth Holdings LLC
•
Filing: 1959-10-09
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Granted: 1962-05-22
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Expires: 1979-10-09
Abstract
No abstract record available.
Inventors
- 👤 Hlavka Joseph John
- 👤 Boothe James Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:44
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF PREPARING 7-HALO-6-DEOXYTETRACYCLINES OF THE FORMULA: WHEREIN R1 IS A MEMBER OF THE GROUP CONSISTING OF BROMINE, CHLORINE AND IODINE AND R2 IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND METHYL WHEN R3 IS HYDROGEN AND R2 IS METHYL WHEN R3 IS HYDROXY WHICH COMPRISES TREATING A COMPOUND OF THE GROUP CONSISTING OF 6-DEOXYTETRACYCLINE, 6-DEMETHYL-6-DEOXYTETRACYCLINE AND 5-HYDROXY-6-DEOXYTETRACYCLINE WITH AN N-HALOAMIDE OF THE GROUP CONSISTING OF N-BROMOSUCCINIMIDE, N-BROMOACETAMIDE, N-BROMOPHTHALIMIDE, N-CHLOROSUCCINIMIDE, AND N-IODOSUCCINIMIDE IN THE PRESENCE OF A CONCENTRATED MINERAL ACID AT A TEMPERATURE OF FROM ABOUT 0*C. TO ABOUT 20*C.
Claim 2
Independent Claim
93 words
THE METHOD OF PREPARING 7-HALO-6-DEOXYTETRACYCLINES OF THE FORMULA: WHEREIN R1 IS A MEMBER OF THE GROUP CONSISTING OF BROMINE, CHLORINE AND IODINE AND R2 IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND METHYL WHEN R3 IS HYDROGEN AND R2 IS METHYL WHEN R3 IS HYDROXY WHICH COMPRISES TREATING A COMPOUND OF THE GROUP CONSISTING OF 6-DEOXYTETRACYCLINE, 6-DEMETHYL-6-DEOXYTETRACYCLINE AND 5-HYDROXY-6-DEOXYTETRACYCLINE WITH AN N-HALOAMIDE OF THE GROUP CONSISTING OF N-BROMOSUCCINIMIDE, N-BROMOACETAMIDE, N-BROMOPHTHALIMIDE, N-CHLOROSUCCINIMIDE, AND N-IODOSUCCINIMIDE IN THE PRESENCE OF A CONCENTRATED MINERAL ACID AT A TEMPERATURE OF FROM ABOUT 0*C. TO ABOUT 20*C.
References Cited (Backward Citations)
US2736725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |