“…First, a range of hypervalent iodine reagents such as PhI(OAc) 2 , PhI (OH)OTs, PhIO 2 , PhICl 2 , PhI(OCOCF 3 ) 2 , and PhIO were used as oxidant in the reaction, however, all of them were not satisfactory probably due to their poor solubility in water ( Table 1, entries 1-6). Recently, Zhdankin and co-workers [35,36] have reported a mild and efficient method for the preparation of oligomeric iodosylbenzene sulfate (PhIO) 3 ÁSO 3 . This sulfate can find practical application as a readily available, stable, and water-soluble hypervalent iodine reagent with a reactivity pattern similar to iodosylbenzene [37,38].…”