Table 4.

Visible-Light Photocatalytic Coupling of N-Phthalimidoyl Oxalate 3a with MVK in the Presence of Potential Stoichiometric Reductantsa^a

Entry	Reductant		Yield of 5 (%)
1		4 R = 4	82b
2		6 R = Me	ND
3		7 R = Ph	ND
4			60c
5			73c
6			ND

^aConditions of eq 2 using i-Pr₂NEt•HBF₄; [3a] = 0.15 M.

^bIsolated yield after silica gel chromatography.

^cYield measured by 1H NMR relative to an internal standard (1,4-dimethoxybenzene);

ND = not detected.