Trimethyl orthovalerate → 7-benzyloxy-2-butyl-1-(2-phenoxyethyl)-1H-imidazo[4,5-c]quinoline
Reaction equation
[C:1](OC)(OC)(OC)[CH2:2][CH2:3][CH2:4][CH3:5].[CH2:12]([O:19][C:20]1[CH:29]=[C:28]2[C:23]([C:24]([NH:31][CH2:32][CH2:33][O:34][C:35]3[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=3)=[C:25]([NH2:30])[CH:26]=[N:27]2)=[CH:22][CH:21]=1)[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1>>[CH2:12]([O:19][C:20]1[CH:21]=[CH:22][C:23]2[C:24]3[N:31]([CH2:32][CH2:33][O:34][C:35]4[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=4)[C:1]([CH2:2][CH2:3][CH2:4][CH3:5])=[N:30][C:25]=3[CH:26]=[N:27][C:28]=2[CH:29]=1)[C:13]1[CH:14]=[CH:15][CH:16]=[CH:17][CH:18]=1Participants
3
Procedure
Under a nitrogen atmosphere, trimethyl orthovalerate (2.7 mL, 16 mmol) was added dropwise to a solution of 7-benzyloxy-N4-(2-phenoxyethyl)quinoline-3,4-diamine (3.0 g, 7.8 mmol), prepared as described in Parts A and B of Example 46, in xylenes (30 mL), and the reaction was heated at reflux for 24 hours. The reaction mixture was allowed to cool to ambient temperature; a precipitate formed, which was isolated by filtration, washed with hexanes, and dried for two hours in a vacuum oven to provide 2.96 g of 7-benzyloxy-2-butyl-1-(2-phenoxyethyl)-1H-imidazo[4,5-c]quinoline.