How is 2,4,6-Trichlorobenzonitrile (CAS: 6575-05-9) typically synthesized?

2,4,6-Trichlorobenzonitrile is typically synthesized through a two-step process. In the first step, chlorobenzene is nitrated using concentrated nitric acid and sulfuric acid to form 2,4,6-trinitrotoluene. This intermediate is then reduced using zinc dust and hydrochloric acid to form the final product. This method ensures high selectivity and yield, with the use of appropriate catalysts and solvents.