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US4101554A
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US
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Catalytic process for the preparation of perfluoroalkyl-substituted heterocyclic compounds
Assignee: Olin Corp
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Filing: 1977-04-27
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Granted: 1978-07-18
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Expires: 1997-04-27
Abstract
Abstract Process for the preparation of perfluoroalkyl-substituted heterocyclic compounds wherein perfluoroalkyl bromide is reacted with the heterocyclic substrate in a vapor phase under anhydrous conditions at temperatures from about 300 DEG C to about 800 DEG C in the presence of a catalytic amount of a catalyst selected from the group of iodine or an iodine generating compound.
Inventors
- 👤 John H. Tobin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:38
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
105 words
A process for preparing perfluoroalkylsubstituted pyridines which comprises a. heating together in the vapor phase under anhydrous conditions at temperatures from about 300° C to about 800° C (1) a pyridine compound containing at least one hydrogen atom attached to a ring carbon atom and further substituted with from 0 to about 3 inert substituents; (2) a perfluoroalkyl bromide having from about 1 to about 4 carbon atoms; and (3) a catalytic amount of a catalyst selected from the group consisting of iodine and an iodine generating compound selected from the group consisting of perhaloalkyl iodine having 1 to 4 carbon atoms, IBr, and ICl.
Claim 2
Dependent Claim
105 words
A process for preparing perfluoroalkylsubstituted pyridines which comprises a. heating together in the vapor phase under anhydrous conditions at temperatures from about 300° C to about 800° C (1) a pyridine compound containing at least one hydrogen atom attached to a ring carbon atom and further substituted with from 0 to about 3 inert substituents; (2) a perfluoroalkyl bromide having from about 1 to about 4 carbon atoms; and (3) a catalytic amount of a catalyst selected from the group consisting of iodine and an iodine generating compound selected from the group consisting of perhaloalkyl iodine having 1 to 4 carbon atoms, IBr, and ICl.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein said pyridine is 2-chloropyridine.
Claim 4
Dependent Claim
35 words
The process of claim 1 wherein said inert substituents are selected from the group consisting of fluorine, chlorine, bromine, perfluoroalkyl having 1 to about 4 carbon atoms, perchloroalkyl having 1 to about 4 carbon atoms.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein said perfluoroalkyl bromide is perfluoromethyl bromide.
Claim 6
Dependent Claim
10 words
The process of claim 3 wherein said catalyst is iodine.
Claim 7
Dependent Claim
16 words
The process of claim 3 wherein said perfluoroalkyl bromide has from 1 to 2 carbon atoms.
Claim 8
Dependent Claim
10 words
The process of claim 6 wherein said catalyst is iodine.
Claim 9
Dependent Claim
22 words
The process of claim 7 wherein said pyridine is unsubstituted pyridine or a mono-substituted pyridine and said perfluoroalkyl bromide is perfluoromethyl bromide.
Claim 10
Dependent Claim
18 words
The process of claim 8 wherein said reaction temperature is from about 600° C to about 700° C.
References Cited (Backward Citations)
US3890326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |