Hydrochloric Acid → HCID 15737328, compound

Participants

Reaction Steps

To a solution of diethyl 2-methyl-4-(2-methoxycarbonylphenyl)-6-diethoxymethyl-1,4-dihydropyridine-3,5-dicarboxylate (5.03 g) in acetone (50 ml) was added 6N-hydrochloric acid (5 ml), and the mixture was stirred for 2 hours at room temperature. After adding water (30 ml), the reaction mixture was neutralized with an aqueous sodium bicarbonate solution and acetone was distilled off under reduced pressure. The resultant oily precipitates were extracted with ethyl acetate. The ethyl acetate extracts were washed with water, saturated aqueous sodium chloride solution, dried over magnesium sulfate and evaporated to dryness under reduced pressure to give reddish oil of crude diethyl 2-methyl-4-(2-methoxycarbonylphenyl)-6-formyl-1,4-dihydropyridine-3,5-dicarboxylate (4.26 g), which was used in a succeeding reaction without further purification.

Provenance & Evidence