Table 2. Scope of Surfactants for Pd-Catalyzed Carboxylate-Directed C–H Arylation in Water.

entry	surfactant	conversion (%)
1	none	0
2	Tween 80	82
3	Tween 20	87
4	Tween 40	77
5	Tween 60	55
6	Brij 35	67
7	SDS	10
8	HTAB	40