US4115390A
Expired / Lapsed
US
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Method for the preparation of 1-alkyl pyridinium chlorides
Assignee: Individual
•
Filing: 1977-08-19
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Granted: 1978-09-19
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Expires: 1997-08-19
Abstract
Abstract A method for preparing alkyl pyridinium chlorides by effecting a direct reaction between the corresponding alkyl chloride and pyridine.
Inventors
- 👤 John C. Nardi
- 👤 Charles L. Hussey
- 👤 Lowell A. King
- 👤 Ronald A. Carpio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:02
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D213/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
A method for synthesizing 1-alkyl pyridinium chloride which comprises the steps of (1) effecting a reaction within a closed reaction vessel between (A) a liquified alkyl chloride selected from the group consisting of methyl chloride, ethyl chloride, 1-propyl chloride and 1-butyl chloride wherein said alkyl chloride was previously liquified in a cold trap of acetone and (B) 10 percent stoichiometric excess pyridine; (2) continuing said reaction under pressure at a temperature of from room temperature to about 120° C. and for a period of time sufficient to produce said alkyl pyridinium chloride; and (3) washing the product of step (2) in ether, followed by filtering and vacuum drying.
Claim 2
Independent Claim
108 words
A method for synthesizing 1-alkyl pyridinium chloride which comprises the steps of (1) effecting a reaction within a closed reaction vessel between (A) a liquified alkyl chloride selected from the group consisting of methyl chloride, ethyl chloride, 1-propyl chloride and 1-butyl chloride wherein said alkyl chloride was previously liquified in a cold trap of acetone and (B) 10 percent stoichiometric excess pyridine; (2) continuing said reaction under pressure at a temperature of from room temperature to about 120° C. and for a period of time sufficient to produce said alkyl pyridinium chloride; and (3) washing the product of step (2) in ether, followed by filtering and vacuum drying.
Claim 3
Dependent Claim
14 words
A method in accordance with claim 1 wherein said alkyl chloride is methyl chloride.
Claim 4
Dependent Claim
14 words
A method in accordance with claim 1 wherein said alkyl chloride is ethyl chloride.
Claim 5
Dependent Claim
14 words
A method in accordance with claim 1 wherein said alkyl chloride is 1-propyl chloride.
Claim 6
Dependent Claim
14 words
A method in accordance with claim 1 wherein said alkyl chloride is 1-butyl chloride.
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |