US4069262A
Expired / Lapsed
US
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Preparation of 2-fluoronitrobenzene
Assignee: EIDP Inc
•
Filing: 1977-03-07
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Granted: 1978-01-17
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Expires: 1997-03-07
Abstract
Abstract An improved process for preparing 2-fluoronitrobenzene by reacting 2-chloronitrobenzene with ultra-fine particulate potassium fluoride in tetramethylene sulfone with a macrocyclic ether or a quaternary ammonium halide catalyst. 2-fluoronitrobenzene is an intermediate useful in the preparation of certain known herbicides.
Inventors
- 👤 Robert Allison Kunz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:07
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/06; C07C201/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
47 words
A process for preparing 2-fluoronitrobenzene which comprises heating a mixture of 2-chloronitrobenzene potassium fluoride of particle size 1-20 microns and a catalyst in sulfolane for 2-8 hours at 240°-250° C wherein the molar ratio of 2-chloronitrobenzene to potassium fluoride to sulfolane is 1 : 1.1-1.5 : 0.3-1.0.
Claim 2
Dependent Claim
47 words
A process for preparing 2-fluoronitrobenzene which comprises heating a mixture of 2-chloronitrobenzene potassium fluoride of particle size 1-20 microns and a catalyst in sulfolane for 2-8 hours at 240°-250° C wherein the molar ratio of 2-chloronitrobenzene to potassium fluoride to sulfolane is 1 : 1.1-1.5 : 0.3-1.0.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein the reaction is carried out at 240°-242° C and the molar ratio of 2-chloronitrobenzene to potassium fluoride to sulfolane is 1: 1.1-1.5 : 0.9-1.0.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the catalyst is selected from the group consisting of macrocyclic ethers and quaternary ammonium halides.
Claim 5
Dependent Claim
21 words
The process of claim 2 wherein the catalyst is selected from the group consisting of macrocyclic ethers and quaternary ammonium halides.
Claim 6
Dependent Claim
22 words
The process of claim 4 wherein the catalyst is 1,4,7,10,13,16-hexaoxacyclooctadecane and the molar ratio of 2-chloronitrobenzene to catalyst is 1 : 0.001-0.01.
Claim 7
Dependent Claim
14 words
The process of claim 5 wherein the reaction is carried out at 240°-242° C.
Claim 8
Dependent Claim
17 words
The process of claim 5 wherein the molar ratio of 2-chloronitrobenzene to catalyst is 1 : 0.002-0.004.
Claim 9
Dependent Claim
14 words
The process of claim 7 wherein the reaction is carried out at 240°-242° C.
Claim 10
Dependent Claim
25 words
The process of claim 4 wherein the catalyst is a quaternary ammonium halide and the molar ratio of 2-chloronitrobennzene to catalyst is 1 : 0.01-0.05.
Claim 11
Dependent Claim
22 words
The process of claim 9 wherein the catalyst is selected from the group consisting of tetrabutylammonium chloride, benzyltrimethylammonium fluoride, or benzyltriethylammonium chloride.
Claim 12
Dependent Claim
14 words
The process of claim 10 wherein the reaction is carried out at 240°-242° C.
Claim 13
Dependent Claim
17 words
The process of claim 10 wherein the molar ratio of 2-chloronitrobenzene to catalyst is 1 : 0.02-0.03.
Claim 14
Dependent Claim
14 words
The process of claim 12 wherein the reaction is carried out at 240°-242° C.
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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |