Table 1.

Reaction optimization.^[a]

Entry	Variation from “standard conditions”	Yield [%][b]
1	None	81
2	N2 instead of N1	55
3	N3 instead of N1	<5
4	N4 instead of N1	<5
5	Na2CO3 instead of Cs2CO3	<5
6	K2CO3 instead of Cs2CO3	<5
7	benzoyl chloride instead of benzoyl fluoride	<5
8	[Ir(dF(CF3)ppy)2(dtbbpy)]PF6 instead of 4CzIPN	84
9	Ru(bpy)3(PF6)2 instead of 4CzIPN	<5
10	Ir(dF(CF3)ppy2)(5,5′‐dCF3bpy)PF6 instead of 4CzIPN	<5
11	Without 4CzIPN	<5
12	Without N1	<5
13	In dark	<5

[a] Reaction conditions: 1 a (0.25 mmol), 2 a (0.10 mmol), N1 (10 mol %), 4CzIPN (5 mol %), Cs₂CO₃ (0.20 mmol) in anhydrous 1,2‐DCE (1.0 mL), irradiation with blue LED at room temperature for 12 h. [b] isolated yield.