Oxidative Carbonylation of Aromatic Amines with CO Catalyzed by 1,3-Dialkylimidazole-2-selenone in Ionic Liquids

Table 2

Reusability of the catalysts in the reaction.

Entry^a	Cycle	Yield^b
1	0	94
2	1	96
3	2	99
4	3	92

^aReaction conditions: catalyst a (0.46 mmol), [BMIM]BF₄ (0.25 g), aniline (5.0 mmol), Pair = 0.2 Mpa, Pair + Pco = 1.3 Mpa; temperature = 90°C; reaction time = 6 h; ^bisolated yields.