US3852289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfenylation of n-arylheterocyclic compounds
Assignee: Pfizer Inc
•
Filing: 1973-03-20
•
Granted: 1974-12-03
•
Expires: 1993-03-20
Abstract
Abstract A process for the sulfenylation of N-phenylheterocyclic congeners with p-chlorosulfenyl chloride in a reaction-inert solvent at about 25*-110* C., said products being useful as coccidiostats or as intermediates for the preparation thereof.
Inventors
- 👤 B Mylari
- 👤 T Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:02
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; A; A61; A61P; A61P33/00; A61P33/02; C07C; C07C251/00; C07C251/72; C07D253/00; C07D253/02; C07D253/06; C07D253/065; C07D253/07; C07D253/075
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
A PROCESS FOE THE PREPARATION OF COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
10 words
A PROCESS FOE THE PREPARATION OF COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein R1 and R2 are each methyl.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein R1 is methyl and R2 is chloro.
References Cited (Backward Citations)
US3560496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |