Regioselective double Kyodai nitration of toluene and chlorobenzene over zeolites. high preference for the 2,4-dinitro isomer at the second nitration stage.
[reaction: see text]. The Kyodai nitration of toluene and chlorobenzene has been examined in the presence of a solid inorganic catalyst (montmorillonite 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.
Peng
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Department of Chemistry, School of Science, Kwansei Gakuin University, Nishinomiya 662-8501, Japan.
Suzuki
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