1,2,4-Trichlorotrifluorobenzene reacted with potassium hydrogen sulfide, potassium hydroxide, sodium isopropoxide, liquid ammonia, and ethyl cyanoacetate via nucleophilic substitution of one fluorine atom with predominant formation of the isomer in which the new substituent replaced fluorine atom in the 5-position.

中文翻译：

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1,2,4-三氯三氟苯与亲核试剂的反应

1,2,4-三氯三氟苯通过一个氟原子的亲核取代反应与硫化氢钾，氢氧化钾，异丙醇钠，液氨和氰基乙酸乙酯反应，主要形成异构体，其中新的取代基取代了5-位置。