Table 1. Optimization of reaction conditions ^a .

Entry	Conditions	Yield (%)
		b0	b1
1	H2O	—	45
2	H2O/CH3CN 2 : 1	22	26
3	H2O/CH3OH 2 : 1	78	20
4	H2O/DMF 2 : 1	67	30
5	H2O/CH3COCH3 2 : 1	76	21
6	H2O/CH2Cl2 1 : 3, 5% Bu4NCl	—	96
7 c	H2O/CH2Cl2 1 : 3, 5% Bu4NCl	—	—
8 d	H2O/CH2Cl2 1 : 3, 5% Bu4NCl	—	—

^a0.4 mmol a1, 0.5 mol% Ptpop-I, 3 mL solvent, degassed for 15 min under N₂, 410 nm LED irradiation, 8 hours.

^bYield determined by ¹H NMR spectroscopy using CH₂Br₂ as internal standard.

^cNo light.

^dNo Ptpop-I.