US3890326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bromination with trifluoromethylbromide
Assignee: Olin Corp
•
Filing: 1973-12-13
•
Granted: 1975-06-17
•
Expires: 1993-12-13
Abstract
Abstract A process for producing selected brominated aromatic or heteroaromatic compounds and fluoroform comprising reacting in the vapor phase a selected aromatic or nitrogen substituted heteroaromatic reactant and trifluoromethylbromide.
Inventors
- 👤 John H Tobin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:58
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/12; C07B; C07B39/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
94 words
A PROCESS FOR PREPARING A BROMINATED AROMATIC OR HETEROAROMATIC COMPOUND AND FLUOROFORM WHICH COMPRISES REACTING A SELECTED REACTANT WITH TRIFLUOROMETHYLBROMIDE IN THE VAPOR PHASE AND A TEMPERATURE OF AT LEAST 400*C., SAID REACTANT BEING SELECTED FROM THE GROUP CONSISTING OF AROMATIC HYDROCARBONS AND HETEROAROMATIC COMPOUNDS HAVING 6 TO 10 RING ATOMS CONSISTING OF CARBON AND NOT MORE THAN 2 ATOMS OF NITROGEN, SAID AROMATIC REACTANT BEING SUBSTITUTED WITH HYDROGEN AND FURTHER SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HALOGEN, PERHALOALKYL HAVING 1 TO 4 CARBON ATOMS, NITRILE AND COMBINATIONS OF SUCH FURTHER SUBSTITUENTS.
Claim 2
Dependent Claim
94 words
A PROCESS FOR PREPARING A BROMINATED AROMATIC OR HETEROAROMATIC COMPOUND AND FLUOROFORM WHICH COMPRISES REACTING A SELECTED REACTANT WITH TRIFLUOROMETHYLBROMIDE IN THE VAPOR PHASE AND A TEMPERATURE OF AT LEAST 400*C., SAID REACTANT BEING SELECTED FROM THE GROUP CONSISTING OF AROMATIC HYDROCARBONS AND HETEROAROMATIC COMPOUNDS HAVING 6 TO 10 RING ATOMS CONSISTING OF CARBON AND NOT MORE THAN 2 ATOMS OF NITROGEN, SAID AROMATIC REACTANT BEING SUBSTITUTED WITH HYDROGEN AND FURTHER SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HALOGEN, PERHALOALKYL HAVING 1 TO 4 CARBON ATOMS, NITRILE AND COMBINATIONS OF SUCH FURTHER SUBSTITUENTS.
Claim 3
Dependent Claim
35 words
The process of claim 1 in which the molar ratio of trifluoromethylbromide to said aromatic reactant is about equal to the number of bromine atoms to be substituted on the ring of said aromatic reactant.
Claim 4
Dependent Claim
20 words
Process of claim 1 wherein said aromatic reactant is selected from the group consisting of benzene, halobenzenes, perhaloalkylbenzene and benzonitrile.
Claim 5
Dependent Claim
20 words
Process of claim 1 wherein said aromatic reactant is selected from the group consisting of pyridine, halopyridine, perhaloalkyl pyridine, nitrilopyridine.
Claim 6
Dependent Claim
15 words
Process of claim 1 wherein said temperature is in the range of 400*C. to 1000*C.
Claim 7
Dependent Claim
21 words
Process of claim 1 wherein said aromatic reactant is a halobenzene selected from the group consisting of monohalobenzene, dihalobenzene and trihalobenzene.
Claim 8
Dependent Claim
30 words
The process of claim 6 in which said halobenzene is substituted with a member of the group consisting of chlorine, bromine and fluorine and mixtures of chlorine, bromine and fluorine.
Claim 9
Dependent Claim
12 words
The process of claim 1 in which said aromatic reactant is benzene.
Claim 10
Dependent Claim
12 words
The process of claim 1 in which said aromatic reactant is pyridine.
Claim 11
Dependent Claim
11 words
The process of claim 1 in which said perhaloalkylbenzene is trifluoromethylbenzene.
Claim 12
Dependent Claim
11 words
The process of claim 1 wherein said aromatic compound is benzonitrile.
References Cited (Backward Citations)
US3632807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |