Halex process
In chemistry, the Halex process is used to convert aromatic chlorides to the corresponding aromatic fluorides. The process entails Halide exchange, hence the name. The reaction conditions call for hot solution of the aryl chloride in dimethylsulfoxide and anhydrous potassium fluoride. Potassium chloride is generated in the process. The reaction is mainly applied to nitro-substituted aryl chlorides.
The following reactions are practiced commercially in this manner:
