Preparation of 2-fluoronitrobenzene
AssigneeE. I. Du Pont de Nemours and Company
InventorRobert Allison Kunz
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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.
Claims13
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.degree.-250.degree. C wherein the molar ratio of 2-chloronitrobenzene to potassium fluoride to sulfolane is 1 :
- 1.1-1.5 :
- 0.3-1.0.
Dependencies are inferred from the claim text.