Journal of Chemistry / 2015 / Article / Tab 3

Research Article

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

Table 3

The synthesis of symmetrical ureas from organic amines.

EntryaSubstratesProductsBMIM]BF4 (g) (°C)Yield (%)c

1 [19]0.259094

2 [19]0.259097

3 [19]0.259017

4 [19]0.25907

5 [20]0.259041

6 [21]0.259040

7 [3]0.256070

8 [3]6073

9b [22]CH3CH2NH2CH3CH2NHCONHCH2CH36052

10600

11 [22](CH3)(CH2)3NH2(CH3)(CH2)3NHCONH(CH2)3CH36091

12 [22](CH3)2CHNH2(CH3)2CHNHCONHCH(CH3)26097

13 [19]6098

aReaction conditions: catalyst a (0.10 g), [BMIM]BF4 (0.25 g), amine (5.0 mmol); Pair + Pco = 1.3 Mpa; reaction time = 6 h; b65–75% aqueous solution; cisolated yields.

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