How is 2,6-Dichloro-4-methoxybenzonitrile (CAS: 30482-87-2) typically synthesized?

2,6-Dichloro-4-methoxybenzonitrile is typically synthesized by the reaction of 4-methoxybenzonitrile with chlorine gas in the presence of a Lewis acid catalyst, such as aluminum chloride (AlCl3). The reaction is carried out under anhydrous conditions to ensure optimal yield and selectivity. The process involves the substitution of two chlorine atoms on the benzene ring, leading to the formation of the desired product with high selectivity and good yield.