Table 1.

Solvent effect on photoreaction of 1 and 2 via decarboxylation.

Entry	Solvent	Yield of 3 / %a
1	CH3CN/H2O = 9:1	85
2b		77
3c		60
4	CH3CN	53
5	DMF	68
6	CH3OH	32
7	DMSO	13
8	1,4-Dioxane	0
9	THF	0
10	Benzene	0

^a Isolated yield. ^b Conditions: Phen (5 mM), 1,4-DCB (5 mM), 12 h.^cConditions: Phen (1 mM), 1,4-DCB (1 mM), 15 h.