Nitric Acid → HCID 178470076, compound

Participants

Reaction Conditions

Reaction Steps

In 3 ml of acetic anhydride was dissolved 1.0 g of 3,4-diethoxycarbonyl-6-(4-methoxyethoxymethoxyphenyl)-2-pyridone, and the mixture was cooled to -20° C. and thereafter 0.2 ml of fuming nitric acid was added dropwise. After the mixture was stirred for 1 hour, water was added. After 2 hours' stirring at room temperature, the mixture was extracted with ethyl acetate. The organic layer was washed with an aqueous solution of sodium hydrogencarbonate, water and a saturated aqueous solution of sodium chloride, and dried. After the solvent was distilled off the resulting crystals were collected by filtration with diethyl ether.

Provenance & Evidence