Maleic Acid → 4-Amino-N-[2-(4-benzoylpiperidino)ethyl]-N-(3-pyridyl)benzamide maleate

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Reaction Steps

4-Amino-N-[2-(4-benzoylpiperidino)ethyl]-N-(3-pyridyl)benzamide (3.00 g, 7.00 mmol) was dissolved in ethanol (10.0 ml) to which was subsequently added a ethanol solution (20.0 ml) of maleic acid (812.0 mg, 7.00 mmol) at room temperature, and then stirred. After the solvent was removed by evaporation, the thus precipitated crystals were collected by filtration and washed with ether, and then purified by recrystallization from ethanol-water mixed solution to obtain 2.476 g (65%) of the title compound in a colorless powder form.

Provenance & Evidence