US3910928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-(Cyanimino)-propionitriles
Assignee: Pharmacia and Upjohn Co
•
Filing: 1974-04-26
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Granted: 1975-10-07
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Expires: 1994-04-26
Abstract
Abstract A method for preparing 6-amino-5-R3-2,4-diaminopyrimidine-3oxides which comprises: A. O-alkylating an R3-substituted 2-cyanoacetamide in the presence of an inert organic solvent, thereby forming an enol ether where R is the alkyl from the alkylating agent, B. REACTING SAID ENOL ETHER WITH CYANAMIDE IN AN INERT SOLVENT, THEREBY FORMING A 2-R3-3-(cyanimino)-3-NR1R2-propionitrile c. reacting the 2-R3-3-(cyanimino)-3-NR1R2-propionitrile with a hydroxylamine salt and base, thereby forming the 6-amino-5-R3substituted-2,4-diaminopyrimidine-3-oxide D R A W I N G
Inventors
- 👤 John M Mccall
- 👤 Joseph J Ursprung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:39
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/18; C07D295/195; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
10 words
Compounds in accordance with claim 1 wherein R3 is hydrogen.
Claim 4
Dependent Claim
12 words
A compound in accordancee with claim 1 wherein R3 is hydrogen and
Claim 5
Dependent Claim
12 words
A compound in accordance with claim 1 wherein R3 is hydrogen and
Claim 6
Dependent Claim
12 words
A compound in accordance with claim 1 wherein R3 is methyl and
Claim 7
Dependent Claim
12 words
A compound in accordance with claim 1 wherein R3 is methyl and
Claim 8
Dependent Claim
7 words
A process for preparing a 2-R3-3-(cyanimino)-3-NR1R2 propionitrile
Claim 9
Dependent Claim
7 words
A process for preparing a 2-R3-3-(cyanimino)-3-NR1R2 propionitrile
Claim 10
Dependent Claim
57 words
A process in accordance with claim 7 wherein R3 is hydrogen and R1 and R2 are the same or different and when they are the same, they are each n-butyl or cyclohexyl and when R1 and R2 are different, R1 is hydrogen and R2 is selected from the group consisting of methyl, ethyl, n-butyl, n-decyl, and cyclohexyl.
Claim 11
Dependent Claim
14 words
A process in accordance with claim 7 wherein R3 is hydrogen or methyl and
Claim 12
Dependent Claim
11 words
A process in accordance with claim 7 wherein R3 is hydrogen.
Claim 13
Dependent Claim
12 words
A process in accordance with claim 7 wherein R3 is methyl and
References Cited (Backward Citations)
US3461461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |