Aryl sulfones are commonly encountered in natural products,biologically-active molecules and material chemistry.Traditional cross-couplings of arylhalides,arylboronic acids,arylstannanes and arylzinc reagents etc.with sulfonyl partners are widespreadly used to prepare arylsulfone compounds.Although regioselectivity in these cross-coupling reactions is not an issue,the tedious prior chemical transformations are required to obtain the prefunctionalized aryl partners.Therefore,much recent effort has been switched to the direct transition metal-catalyzed sulfonation of aryl C-H bonds.