Optimization of the reaction conditions.

Entry	Conditionsa	Yield (%)b
1	[Ir(dtbbpy)(ppy)2]PF61a	96
2	23 W CFL instead of 450 nm LED, 1a, 16 h	95
3	2 mol% Ti, 1a, 24 h	94
4	4CzIPN 1b, 16 h	94
5	No titanocene	0
6	No HE	0
7	No photocatalyst	0
8	No hν	0
9	DCE instead of THF, 1a	93
10	Et3N instead of HE, 1a	9
11	Na2CO3 (1.0 equiv.) as additive, 1a	0

^aReaction conditions: 2a (100 mg, 0.1 M in THF).

^bIsolated yield.