Huang Chong-pao
2004
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Fine Chemical Intermediates
Abstract
2,3,4-Trifluoronitrobenzene was synthesized from 2,6-dichlorofluorobenzene through two steps:①nitration in the presence of anhydrous Na_2SO_4 with the formation of 2,6-dichloro-3-nitroluorobenzene;②fluorination by reaction with anhydrous KF in the presence of DMF and quaternary ammonium salt at 160~165 ℃ to give the titled product, the yield of fluorination is about 83%.