Table 1. Optimization of fluoroalkene synthesis ^a .

Entry	Catalyst	F+ (equiv.)	T (°C)	Yield b (%)
1	[Rh(cod)2]BF4	NFSI (1.5)	23	58
2	[Ir(cod)Cl]2	NFSI (1.5)	23	60
3	[RuCl2(p-cymeme)]2	NFSI (1.5)	23	59
4	—	NFSI (1.5)	23	61
5	—	Selectfluor	23	<5
6	K2CO3	NFSI (1.5)	23	55
7	In the dark	NFSI (1.5)	23	60
8	Ag2CO3	NFSI (1.5)	23	54
9	CuCl	NFSI (1.5)	23	50
10	—	NFSI (1.5)	40	66
11	—	NFSI (2.0)	40	70
12	—	NFSI (2.0)	40	82 (4a) c

^aThe reactions were carried out with 0.2 mmol of 1a and 100 mg of a 4 Å molecular sieve in 2 mL of toluene open to air using commercially available NFSI.

^bIsolated yields.

^cThe isolated yield of alcohol 4a after the reduction of the aldehyde.