Hydrochloric Acid → 2-Amino-6-methyl-4-oxo-4H-pyran-3-carbonitrile

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Reaction Steps

To a solution of malononitrile (3.3 g, 50 mmol) in 100 ml of anhydrous tetrahydrofuran was added sodium hydride (60%, 2.2 g, 55 mmol) at −10° C. The resulting reaction mixture was stirred for 2 hours. Then diketene (4.2 g, 50 mmol) was added dropwise to the solution. The reaction mixture was allowed to warm to room temperature and continued to stir for 30 minutes. The mixture was neutralized with hydrochloric acid, and then concentrated to give crude product as red solid, which was used in the next step without further purification.

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