CNC(O[N:6]1[C:14]2[C:9](=[N:10][CH:11]=[C:12]([Cl:15])[CH:13]=2)[N:8]=[C:7]1[C:16]([F:19])([F:18])[F:17])=O.[ClH:20].O>CO>[Cl:20][C:11]1[N:10]=[C:9]2[N:8]=[C:7]([C:16]([F:19])([F:18])[F:17])[NH:6][C:14]2=[CH:13][C:12]=1[Cl:15]1-(Methylcarbamoyloxy)-6-chloro-2-(trifluoromethyl) -1H-imidazo [4,5-b] pyridine (250 milligrams) in 2.5milliliters of methanol was saturated with HCl. The reaction mixture was permitted to stand for three hours, then poured into water and filtered to separate the desired 5,6-dichloro-2-(trifluoromethyl)-1H-imidazo[ 4,5-b] pyridine, m.p., 280° -30° C.
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