US3361748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of pteridinones
Assignee: Merck and Co Inc
•
Filing: 1965-11-22
•
Granted: 1968-01-02
•
Expires: 1985-11-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward J Cragoe
- 👤 John B Bicking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:35
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/02; C07D241/10; C07D241/14; C07D241/24; C07D241/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A PROCESS FOR PRODUCING A 3-R8-6-HALO-7X-4N3H)PTERIDINONE WHICH COMPRISES REACTING A 3-AMINO-5-X-6HALO-PYRAZIN-CONHR8 WITH A MIXTURE OF EXCESS QUANTITIES OF TRIALKYLORTHOFORMATE AND ACETIC ANHYDRIDE AT A TEMPERATURE BETWEEN 50*C. AND REFLUX TEMPERATURE WHEREIN IN EACH OF THE FOREGOING STRUCTURES X IS SELECTED FROM HYDROGEN, CHLORO, LOWER ALKYL AND PHENYL; HALO IS SELECTED FROM CHLORO AND BROMO; AND R8 IS SELECTED FROM HYDROGEN AND LOWER ALKYL.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PRODUCING A 3-R8-6-HALO-7X-4N3H)PTERIDINONE WHICH COMPRISES REACTING A 3-AMINO-5-X-6HALO-PYRAZIN-CONHR8 WITH A MIXTURE OF EXCESS QUANTITIES OF TRIALKYLORTHOFORMATE AND ACETIC ANHYDRIDE AT A TEMPERATURE BETWEEN 50*C. AND REFLUX TEMPERATURE WHEREIN IN EACH OF THE FOREGOING STRUCTURES X IS SELECTED FROM HYDROGEN, CHLORO, LOWER ALKYL AND PHENYL; HALO IS SELECTED FROM CHLORO AND BROMO; AND R8 IS SELECTED FROM HYDROGEN AND LOWER ALKYL.
Claim 3
Dependent Claim
5 words
A PTERIDINONE OF THE STRUCTURE
Claim 4
Dependent Claim
5 words
A PTERIDINONE OF THE STRUCTURE
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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |