Table 1.

Effect of Reaction Parameters on the Fluorination of Arylsilanes.^[a]

Entry	[Cu] (equiv)	[F−] (equiv)	T [°C]	Yield (%)[b]
1	Cu(OTf)2 (3.0)	KHF2 (4.0)	120	trace
2	Cu(OTf)2 (3.0)	KHF2 (4.0)	80	25
3	Cu(OTf)2 (3.0)	KHF2 (4.0)	65	40
4	Cu(OTf)2 (3.0)	KHF2 (4.0)	50	trace
5	Cu(OTf)2 (2.0)	KHF2 (4.0)	65	trace
6	Cu(OTf)2 (6.0)	KHF2 (4.0)	65	60
7	Cu(OTf)2 (6.0)	KHF2 (6.0)	65	74
8	CuF2 (6.0)	KHF2 (6.0)	65	0
9	(tBuCN)CuOTf (6.0)	KHF2 (6.0)	65	0
10	Cu(OTf)2 (6.0)	AgF (6.0)	65	0
11	Cu(OTf)2 (6.0)	CsF (6.0)	65	23

^[a]Reactions run on a 0.05 mmol scale.

^[b]Determined by ¹⁹F NMR spectroscopy with 1-fluoro-3-nitrobenzene as internal standard.