Table 1. Optimization of Reaction Conditions^a.

entry	catalyst	oxidant	solvent	yieldb (%)	sel (%)
1		TBHP (1 equiv)	H2O	24	88
2		TBHP (2 equiv)	H2O	53	86
3		TBHP (3.2 equiv)	H2O	89	97
4		TBHP (5.0 equiv)	H2O	92	98
5c		TBHP (3.2 equiv)	H2O	32	93
6d		TBHP (3.2 equiv)	H2O	36	95
7		H2O2 (3.2 equiv)	H2O	32	53
8		DTBP (3.2 equiv)	H2O	trace
9		urea peroxide (3.2 equiv)	H2O	trace
10e		TBHP (3.2 equiv)	H2O	83	91
11		TBHP (3.2 equiv)	toluene	53	93
12		TBHP (3.2 equiv)	MeOH	26	87
13		TBHP (3.2 equiv)	DMSO	23	91

^aUnless otherwise specified, all of the reactions were carried out with benzyl alcohol (2.0 mmol, 208 μL) and 2-aminobenzamide (1.0 mmol, 136 mg) as the model substrates, illuminated under a 40 W white light-emitting diode (LED) lamp for 12 h at 25 °C.

^bIsolated yield.

^cUnder dark conditions at 25 °C.

^dUnder dark conditions at 90 °C.

^eUnder a N₂ environment.