Regioselective Double Kyodai Nitration of Toluene and CHlorobenzene over Zeolites. High Preference for the 2,4-Dinitro Isomer at the Second Nitration Stage

摘要

The Kodai nitration of toluene and chlorobenzene has been examined in the presence of a solid inorganic catalyst (monotrmorillonite K10, zeolite HZSM-5, or HBEA-25). Regioselection was quite low at the mononitration stage, but a considerably high preference for the 2,4-isomer was observed at the dinitration stage.