Acetic Acid → 1-Ethyl-3-cyano-5,6-dimethyl-2-pyridone

Participants

Reaction Conditions

Reaction Steps

To a suspension of 2-methyl-3-oxobutanal sodium salt (3.18 g) and N-ethylcyanoacetamide (3-0003-02) (2.243 g) in DMF (20 mL) were added acetic acid (1.49 mL) and piperidine (0.40 mL) at room temperature, and the reaction mixture was refluxed with stirring in an oil bath at 135° C. for 5 h. The reaction mixture was dissolved in chloroform and water, extracted three times with chloroform, dried over magnesium sulfate, and evaporated under reduced pressure. The obtained crystal residue (4.07 g) was washed three times with n-hexane (1 mL) to give 1-ethyl-3-cyano-5,6-dimethyl-2-pyridone (3-003-03) (3.38 g, 96%) as a brown crystal.

Provenance & Evidence