[NH2:1][C:2]1[CH:11]=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[C:7]([C:12]([O:14]CC)=[O:13])[CH:8]=2)[N:3]=1.[ClH:17]>>[ClH:17].[NH2:1][C:2]1[CH:11]=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[C:7]([C:12]([OH:14])=[O:13])[CH:8]=2)[N:3]=1330 mg of ethyl 2-aminoquinoline-6-carboxylate was stirred in 30 ml of 6 M hydrochloric acid at 80° C. overnight. The solvent was evaporated, and the residue was washed with ethyl acetate to obtain the title compound.
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