Table 1.

Optimization of the hydroimination cyclization

Entry	Substrate[a]	Photocatalyst	Solvent	Yield [%][b]
1	2 a	[Ir(ppy)3]	DMF	81
2	2 a	eosin Y	DMF	68
3	2 a	eosin Y	acetone	93[c]
4	2 b	[Ir(ppy)3]	DMF	53
5	2 b	eosin Y	DMF	15
6	2 c	[Ir(ppy)3]	DMF	91
7	2 c	eosin Y	DMF	7

[a] 2 a: Ar=2,4-(NO₂)₂C₆H₃; 2 b: Ar=4-(NO₂)C₆H₄; 2 a: Ar= 4-(CN)C₆H₄. [b] Determined by ¹H NMR analysis; see the Supporting Information for control experiments. [c] 2,4-Dinitrophenol (8-H) was also isolated; see the Supporting Information.