Formaldehyde → 2,2-Dinitropropanol

Beteiligte Stoffe

Reaktionsschritte

To a stirred solution of 2.66 g (66.5 mmoles) of sodium hydroxide in 15 ml of water at 20° was added 5.0 g (66.5 mmoles) of nitroethane. When all the nitroethane dissolved, the solution was cooled to 5°-7° in an ice-water bath and 5.4 g of 37% aqueous formaldehyde (66.5 mmoles) was then added. The cooling bath was removed and the mixture was stirred for 2 hours before the ice-water bath was replaced and 25 ml of ether was added. A solution of 18.3 g of sodium nitrite (0.265 mole) in 30 ml of water was then added followed by solutions of 15.8 g (66.3 mmoles) of sodium persulfate in 30 ml of water and 4.4 g (13.4 mmoles) of potassium ferricyanide in 15 ml of water. The reaction temperature rose from 14° to 35°. The mixture was then stirred at ambient temperature for 1 hour and phases were separated. The aqueous phase was extracted twice with ether and the combined ether extracts were washed with brine and dried. The product was distilled in a short path distillation apparatus to give 6.57 g (65% yield) of 2,2-dinitropropanol.

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