Nitric Acid → HCID 19003109, compound

Participants

Reaction Conditions

Reaction Steps

Compound 22-4 (1 g) was dissolved in anhydrous acetic acid (100 ml), and cooled to 0° C. To the solution was slowly added dropwise nitric acid (380 μl) with stirring, followed by stirring at the same temperature for 1 hour and subsequently at room temperature for 18 hours. After confining the completion of the reaction, to the mixture was added an ice-water (200 ml), followed by slowly adding solid sodium hydroxide (20 g) thereto and stirring for 1 hour. The obtained mixture was extracted with ether (50 ml×3). The obtained organic layer was washed with aqueous sodium bicarbonate solution and saturated aqueous sodium chloride solution, dried over sodium sulfate, and then filtered. The filtrate was concentrated under reduced pressure and purified by column-chromatography (ethyl acetate/hexane=1/3) to yield the compound 22-5 (1.05 g, 73.7%).

Provenance & Evidence