Table 4.

Iron Catalysis^a

entry	Ar-H, base	product	yield, %
1	Thiazole, base 1 + base 3 (4.7/1)		59
2	4,5-Dimethylthiazole, base 1		68
3	N-Methylbenzimid- azole, base 1		77
4	Tetrafluoropyridine, Base 3		54
5	Tetrafluoroanisole, base 1 + base 3 (0.9/1)		78
6	Ethyl 2,4-difluoro- benzoate, base 1 + base 3 (4.6/1)		70

^aSubstrate (1 equiv), base (1.1–1.3 equiv). Yields are isolated yields. See Supporting Information for details.