1. Optimization of the Conditions for the Reaction of 2a .

entry	NaBArF 24 (mol%)	solvent	additive	3a yield (%)
1	10	DCM		41
2	10	DCM		35
3	10	DCM		41
4	10	DCM	4Å MS	49
5	10	DCM	4Å MS	29
6	10	DCM	4Å MS	40
7	20	DCM	4Å MS	32
8	5	DCM	4Å MS	28
9	10	CHCl3	4Å MS	39
10	10	DCE	4Å MS	45
11	10	THF	4Å MS	18
12	10	MeCN	4Å MS	1
13	10	Acetone	4Å MS	--
14	10	DCM	4Å MS	33
15	10	DCM	4Å MS	37
16	10	DCM	4Å MS	28

^aConditions: NaBAr^F ₂₄ (x mol%), 1b-Cl (1.0 equiv), 2a (0.2 mmol, 1.0 equiv), and 4Å MS (60 mg; 300 mg/mmol) as additive (if used) in the corresponding solvent [0.1 M] were reacted at r.t. (∼23 °C) for 72 h under argon atmosphere.

^bIsolated yield.

^cUse of 10 mol% of KBAr^F ₂₀ as the catalyst.

^dUse of 1.5 equiv of 1b-Cl.

^eAddition of 180 mg (900 mg/mmol) of 4Å MS.

^f24 h reaction.

^g6 days reaction time.

^hReaction at 0 °C.

ⁱReaction at 40 °C.

^jReaction at 80 °C.