Optimization of the 1,4-sulfonylarylation reaction conditions^a.

Entry	PC	[Ni]	Ligand	Yieldb (%)
1	Ru(bpy)3Cl2·6H2O	NiCl2·glyme	dtbbpy	55
2	Ru(bpy)3(PF6)2	NiCl2·glyme	dtbbpy	45
3	[Ir(dFCF3ppy)2(dtbbpy)]PF6	NiCl2·glyme	dtbbpy	62
4	4CzIPN	NiCl2·glyme	dtbbpy	64
5	4CzIPN	NiCl2	dtbbpy	35
6	4CzIPN	NiCl2·6H2O	dtbbpy	11
7	4CzIPN	NiCl2·glyme	diOMebpy	73
8	4CzIPN	NiCl2·glyme	bpy	62
9	4CzIPN	NiCl2·glyme	Phen	0
10c	4CzIPN	NiCl2·glyme	diOMebpy	72
11	—	NiCl2·glyme	diOMebpy	0
12	4CzIPN	—	diOMebpy	0
13	4CzIPN	NiCl2·glyme	—	0
14d	4CzIPN	NiCl2·glyme	diOMebpy	0
15e	4CzIPN	NiCl2·glyme	diOMebpy	0

^aReaction conditions: 1a (0.2 mmol), 2a (0.1 mmol) and 3a (0.12 mmol) in DMSO (1.0 mL), photocatalyst (1 mol%), nickel-precatalyst (10 mol%), ligand (14 mol%), at room temperature, 30 W blue LEDs, 20 h.

^bIsolated yield.

^cNiCl₂·glyme (5 mol%), diOMebpy (7 mol%).

^dNo light.

^eReaction was performed in air.