TABLE 2.

The table for optimizing solvent and visible light in the synthesis of 4j ^a .

Entry	Light source	Solvent (3 mL)	Time (min)	Isolated yields (%)
1	Blue light (5 W)	EtOAc	5	68
2	Blue light (5 W)	DMSO	25	29
3	Blue light (5 W)	toluene	25	26
4	Blue light (5 W)	H2O	6	71
5	Blue light (5 W)	EtOH	5	97
6	Blue light (5 W)	MeOH	8	59
7	Blue light (5 W)	—	8	46
8	Blue light (5 W)	CHCl3	30	17
9	Blue light (5 W)	CH3CN	5	75
10	Blue light (5 W)	THF	25	15
11	White light (5 W)	EtOH	5	82
12	Green light (5 W)	EtOH	5	90
13	Blue light (3 W)	EtOH	5	89
14	Blue light (7 W)	EtOH	5	97
15	—	EtOH	20	trace

^a Reaction conditions: a mixture of urea (1.5 mmol), benzaldehyde (1.0 mmol), and ethyl acetoacetate (1.0 mmol) was added to 0.2 mol% 3DPAFIPN.