[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][C:2]=1[N:11]1[CH2:16][CH2:15][N:14]([CH2:17][CH2:18][CH2:19][N:20]2C(=O)C3C(=CC=CC=3)C2=O)[CH2:13][CH2:12]1.O.NN>C(O)C>[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][C:2]=1[N:11]1[CH2:12][CH2:13][N:14]([CH2:17][CH2:18][CH2:19][NH2:20])[CH2:15][CH2:16]1To a solution of 1.52 g of 2-[3-(4-quinolin-2-ylpiperazin-1-yl)propyl]isoindol-1,3-dione in 30 ml of ethanol, another solution of 1.50 g of hydrazine monohydrate in 10 ml of ethanol was added, and heated under reflux for 7 hours. Cooling the reaction mixture, insoluble matter was separated by filtration, and the solvent was distilled off under reduced pressure. The residue was made alkaline with 5N-sodium hydroxide, extracted with chloroform, washed with saturated brine and dried over anhydrous sodium sulfate. Distilling the solvent off under reduced pressure, 0.99 g (96%) of 3-(4-quinolin-2-ylpiperazin-1-yl)propylamine was obtained.
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