US3694428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Streptozotocin and derivatives
Assignee: Individual
•
Filing: 1970-03-05
•
Granted: 1972-09-26
•
Expires: 1990-03-05
Abstract
Abstract Methods of producing streptozotocin and novel derivatives thereof by reacting an N-nitroso-alkylcarbamyl azide with Dglucosamine or an acid addition salt thereof are disclosed. Novel intermediates which are useful in the process are also disclosed. Streptozotocin and its novel derivatives are useful as diabetogenetic compounds.
Inventors
- 👤 Emil Hardegger
- 👤 Arthur Josef Johann Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:20
CPC Classifications
C; C07; C07H; C07H13/00; C07H13/12; C07C; C07C247/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
15 words
Process according to claim 1 wherein the reaction is carried out in an inert solvent.
Claim 2
Dependent Claim
18 words
Process according to claim 1 wherein the reaction temperature is from about -20* C. to about +40* C.
Claim 3
Dependent Claim
13 words
Process according to claim 1 wherein the reactants are D-glucosamine and N-nitroso-methylcarbamyl azide.
Claim 4
Dependent Claim
14 words
Process according to claim 1 wherein the reactants are D-glucosamine hydrochloride and N-nitroso-methylcarbamyl azide.
Claim 5
Dependent Claim
13 words
Process according to claim 1 wherein the reactants are D-glucosamine and N-nitroso-ethylcarbamyl azide.
Claim 6
Dependent Claim
13 words
Process according to claim 1 wherein the reactants are D-glucosamine and N-nitroso-propylcarbamyl azide.
Claim 7
Dependent Claim
13 words
Process according to claim 1 wherein the reactants are D-glucosamine and N-nitroso-butylcarbamyl azide.
References Cited (Backward Citations)
US2993887A
Cited
US3577406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |