Table 1 Initial studies for the photoinduced reaction of 4-vinyl-1,1’-biphenyl 1a with ethyl chlorooxoacetate 2a^a.

^aReaction conditions: 4-vinyl-1,1’-biphenyl 1a (0.2 mmol), ethyl chlorooxoacetate 2a (0.6 mmol), photocatalyst (0.004 mmol), 2,6-lutidine (0.6 mmol), solvent (4.0 mL), blue LEDs, under N₂ atmosphere. Conversion of 1a and the yield of 3a was determined by ¹H NMR analysis using 1,3,5-trimethoxybenzene as an internal standard.
^bDetermined by ¹H NMR analysis.
^cCompound 2a’ was used instead of ethyl chlorooxoacetate 2a.
^d2,6-Lutidine (0.3 mmol).
^eIn the dark.

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