Optimization of reaction conditions^a.

Entry	Deviation from above	Yieldb (%)
1	None	<5
2	Toluene/H2O (9 : 1) as solvent	44
3	10 mol% of DIPEA	59
4	5 mol% of thiophenol	40
5	20 mol% of thiophenol	60
6	NaHCO3 instead of DIPEA	57
7	Two blue LEDs (∼450 nm, 7 W)	61
8	No photocatalyst	0
9	No base	0
10	No thiophenol	11
11	Open atmosphere	34
12	Argon atmosphere	77
13	Oxygen atmospherec	12

^aReactions carried out on a 0.2 mmol scale in N₂-sparged solvents [0.1 M] at ambient temperature for 24 h.

^bYields determined by GC-MS using hexadecane as internal standard.

^cThe yield of oxygenated by-products was 60%.