393-79-3Relevant articles and documents
Preparation method of 3, 4, 5-trifluorobromobenzene
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, (2020/12/14)
The invention relates to a preparation method of 3, 4, 5-trifluorobromobenzene, belongs to the technical field of chemical synthesis, and solves the problem that a byproduct 3, 4, 5-trichloronitrobenzene generated in a process of preparing 3, 4-dichloronitrobenzene by introducing chlorine into parachloronitrobenzene cannot be effectively utilized. The method comprises the step of preparing 3, 4, 5-trifluorobromobenzene by taking 3, 4, 5-trichloronitrobenzene as a raw material. According to the technical scheme provided by the invention, the utilization rate of raw materials and the efficiencyof the process can be improved, and high-value utilization of byproducts is realized.
Preparation method of 2, 3, 4-trifluoronitrobenzene
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Paragraph 0011, (2019/05/15)
The invention belongs to the field of organic synthesis, and particularly relates to a preparation method of 2, 3, 4-trifluoronitrobenzene. The method comprises the following steps: reacting 2,6-dichlorofluorobenzene as a raw material with HNO3/H2SO4 so as to obtain 2, 6-dichloro-3-nitrofluorobenzene, and then reacting the 2, 6-dichloro-3-nitrofluorobenzene with anhydrous potassium fluoride to obtain the 2, 3, 4-trifluoronitrobenzene. The method disclosed by the invention is high in yield, simple in synthesis and suitable for industrial production.