A process for the preparation of dihalodiphenylsulfones_such as 4,4'-dichlorodiphenyl sulfone or 4,4'-bis-(4-chlorophenylsulfonyl)biphenyl with high regioselectivity, at low temperature and in the absence of toxic reagents by reacting together at least one acid, at least one fluorinated anhydride and at least one halobenzene. The invented process is particularly suited for the manufacture of 4,4'-dichlorodiphenyl sulfone.
一种制备二卤代二苯基砜的方法,例如4,4'-二
氯二苯基砜或4,4'-双-(4-
氯苯基磺酰基)
联苯,具有高区域选择性,在低温下并且不使用有毒试剂的情况下,通过将至少一种酸,至少一种
氟化酐和至少一种卤代苯反应在一起。该发明的方法特别适用于制造4,4'-二
氯二苯基砜。