Table 6. Light-induced aerobic oxidation of secondary amine to imine, catalyzed by 2a or 2c ^a .

Entry	PS	X/R	Convn. b (%)	Yield c (%)
1	2a	H/Bn	100	92%
2	2c	H/Bn	100	99%
3	2c	Cl/tBu	100	99%
4	2c	Br/tBu	100	99%
5	2c	Me/tBu	100	96%
6	—	H/Bn	<5%	n.d. d

^aReaction conditions: dibenzylamine (0.1 mmol) and catalyst (0.1 μmol) in MeCN (1.5 mL), O₂ bubbling, xenon lamp (>400 nm).

^bDetermined by ¹H NMR analysis of the crude reaction mixture.

^cDetermined by ¹H NMR analysis using 1,1-diphenylethylene as an internal standard.

^dn.d. = not determined.