Table 1.

Reaction optimization under flow conditions.

Entry	Equiv of substrate	Solvent, conc. of 1 (M)	Light source	Cat. (%)	Yield (%)a
1	25	CH3CN/CH2Cl, 0.04	465 nm, 18 W	1	40
2	25	CH3CN/CH2Cl, 0.04	400 nm, 10 W	1	52
3	25	CH3CN, 0.04	400 nm, 10 W	1	53
4	25	CH3CN, 0.04	400 nm, 10 W	2	68
5	25	CH3CN, 0.08	400 nm, 10 W	1	65
6	25	CH3CN, 0.08	400 nm, 10 W	2	64
7	10	CH3CN, 0.08	400 nm, 10 W	1	57
8	10	CH3CN, 0.08	400 nm, 10 W	1	63b
9	10	CH3CN, 0.2	400 nm, 10 W	1	61
10	10	CH3CN, 0.08	400 nm, 10 W	1	73c
control experiments
11	25	CH3CN, 0.04	465 nm, 18 W	1	10d
12	25	CH3CN, 0.04	400 nm, 10 W	0	17
13	25	CH3CN, 0.04	465 nm, 18 W	0	0

^{a 19}F NMR yields are reported; ^b Degassed solvent; ^c Freshly prepared; ^d [Ir(dtbbpy)(ppy)₂]PF₆ as catalyst.