N-(3-Formyl-2-pyridinyl)-2,2-dimethylpropanamide → 3-Pyridinecarboxaldehyde, 2-amino-

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N-(3-Formyl-pyridin-2-yl)-2,2-dimethyl-propionamide (9.68 g) was dissolved in 3 N hydrochloric acid (140 ml) to prepare a solution which was then stirred under reflux overnight. The reaction solution was cooled to room temperature, the reaction solution was washed with diethyl ether, and was neutralized with potassium carbonate powder. Diethyl ether was added thereto for extraction. The diethyl ether layer was dried over potassium carbonate. The solvent was removed by distillation under the reduced pressure, and the residue was purified by column chromatography using acetone-chloroform to give 2-amino-pyridine-3-carbaldehyde (5.03 g, yield 88%).

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