C([O:8][C:9]1[CH:14]=[CH:13][C:12]([N:15]2[C:19]3=[N:20][CH:21]=[CH:22][C:23]([CH3:24])=[C:18]3[N:17]3[CH:25]=[CH:26][N:27]=[C:16]23)=[CH:11][CH:10]=1)C1C=CC=CC=1.C1COCC1>[Pd].CO>[CH3:24][C:23]1[CH:22]=[CH:21][N:20]=[C:19]2[N:15]([C:12]3[CH:13]=[CH:14][C:9]([OH:8])=[CH:10][CH:11]=3)[C:16]3[N:17]([CH:25]=[CH:26][N:27]=3)[C:18]=12A mixture of 9-[4-(benzyloxy)phenyl]-5-methyl-9H-imidazo[1′,2′:1,2]imidazo[4,5-b]pyridine (1.35 g), 10% palladium on carbon (containing water (50%), 0.675 g), THF (50 ml) and methanol (50 ml) was stirred under a hydrogen atmosphere at room temperature for 1 hr. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/THF) and recrystallized from hexane/THF to give the title compound (0.950 g).
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