[CH3:1][N:2]1[CH2:7][CH2:6][N:5]([C:8]2[CH:13]=[C:12]([CH2:14][C:15]([O:17]C)=O)[CH:11]=[CH:10][N:9]=2)[CH2:4][CH2:3]1.[NH3:19]>>[CH3:1][N:2]1[CH2:7][CH2:6][N:5]([C:8]2[CH:13]=[C:12]([CH2:14][C:15]([NH2:19])=[O:17])[CH:11]=[CH:10][N:9]=2)[CH2:4][CH2:3]1A solution of methyl 2-(2-(4-methylpiperazin-1-yl)pyridin-4-yl)acetate (750 mg, 2.81 mmol) in methanolic ammonia (10 ml) was heated in a steel bomb at 90° C. for 72 h. The reaction mixture was cooled to room temperature, concentrated and dried in vacuum to afford the crude product. Purification by triturating with diethyl ether afforded 370 mg (31%) of 2-(2-(4-methylpiperazin-1-yl)pyridin-4-yl)acetamide as a light brown color solid.
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