Effect of different conditions (Ni microsphere) on the oxidation of methyl phenyl sulfide.

Entrya	Cat (mg)	Solvent	Time (min)	Yieldb (%)
1	25	EtOH	45	50
2	25	CH3CN	45	43
3	25	CH2Cl2	45	25
4	25	EtOAc	45	62
5	25	—	45	90
6	30	—	40	90
7	15	—	40	72
8	—	—	40	Trace

^aReaction conditions: methyl phenyl sulfide (1 mmol), H₂O₂ 30% (0.4 mL) at room temperature.

^bIsolated yield.