2,3-Dimethyl-8-(2,4-dichlorophenyl)-5,6-dihydroimidazo[1,2-a]pyridine → 2,3-Dimethyl-8-(2,4-dichlorophenyl)imidazo[1,2-a]pyridine
反応式
[CH3:1][C:2]1[N:3]=[C:4]2[C:9]([C:10]3[CH:15]=[CH:14][C:13]([Cl:16])=[CH:12][C:11]=3[Cl:17])=[CH:8][CH2:7][CH2:6][N:5]2[C:18]=1[CH3:19]>C(Cl)Cl.[O-2].[O-2].[Mn+4]>[CH3:1][C:2]1[N:3]=[C:4]2[C:9]([C:10]3[CH:15]=[CH:14][C:13]([Cl:16])=[CH:12][C:11]=3[Cl:17])=[CH:8][CH:7]=[CH:6][N:5]2[C:18]=1[CH3:19]参加物
4
実験手順
2,3-Dimethyl-8-(2,4-dichlorophenyl)-5,6-dihydroimidazo[1,2-a]pyridine (3) (29.3 g, 0.1 mol) is dissolved in methylene chloride (1L) and activated manganese dioxide (120 g) is added. The mixture is heated at reflux for 16 hours with stirring. The catalyst is removed by filtration of the reaction through a Celite pad and the filtrate is evaporated to a solid (4).