Table 1.

Discovery of C-3 C-H arylation of indazole^a

entry	PhI (equiv)	ligand	base	2a (%)b	3 (%)b
1	1.0	Phen	Cs2CO3	24	3
2	2.0	Phen	Cs2CO3	51	14
3	2.0	Phen-PhMe	Cs2CO3	21	0
4	2.0	Dpya	Cs2CO3	42	0
5	2.0	Phen	K3PO4	47	6
6	2.0	Phen	K2HPO4	3	0
Phen		Phen-PhMe		Dpya

^aReaction conditions: Indazole (0.25 mmol) in solvent (1 mL) at 140 °C for 48 h.

^bYield was determined by ¹H NMR using CH₂Br₂ as an internal standard.