Development of a system for clean and regioselective mononitration of aromatic compounds involving a microporous solid, dinitrogen tetroxide and air

Nitration of aromatic compounds using a zeolite as a solid inorganic catalyst and a combination of dinitrogen tetroxide and oxygen or air as the nitrating reagent, in open or sealed systems, leads to high yields and significant para selectivities for halogenobenzenes and other aromatics in a relatively clean process. The material used as catalyst has a strong influence on the reaction.