How is 2,6-Dichloro-4-(trifluoromethyl)benzonitrile (CAS: 157021-61-9) typically synthesized?

2,6-Dichloro-4-(trifluoromethyl)benzonitrile is typically synthesized via the reaction of 2,6-dichlorotoluene with trifluoroacetonitrile in the presence of a suitable base such as potassium carbonate. The reaction is carried out under anhydrous conditions, and the yield is generally good, around 70-80%. This synthesis involves the nucleophilic substitution of the toluene ring with trifluoromethyl and nitrile groups.