(Benzenesulfonyl)difluoromethyl anion, in situ generated from difluoromethyl phenyl sulfone and a base, was found to easily undergo nucleophilic substitution reactions (S
N
2) with primary alkyl halides, elemental halogens, and perfluoroalkyl halides with good selectivity. The formed (benzenesufonyl)difluoromethylalkanes are useful intermediates for the facile preparation of 1,1-difluoro-1-alkenes and difluorometbylalkanes. Thus, difluoromethyl phenyl sulfone acts as both “CF
2
═” and “CF
2
H
−
” synthons.
从二
氟甲基苯磺酰酸和碱生成的(Benzenesulfonyl)difluoromethyl阴离子,在原位生成后,被发现容易与一级烷基卤化物、元素卤素和
全氟烷基卤化物发生亲核取代反应(SN2),具有良好的选择性。形成的(苯磺酰基)二
氟甲基
烷烃是制备1,1-二
氟-1-烯和二
氟甲基
烷烃的方便中间体。因此,二
氟甲基苯磺酰酸同时作为“
CF2═”和“
CF2H−”合成子。