Sodium Bicarbonate → 2-tert-Butyl-4H-1,3,4-oxadiazin-5(6H)-one

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반응 단계

8.34 g (43.29 mmol) of N′-(chloroacetyl)-2,2-dimethylpropanehydrazide were dissolved in 800 ml of dry DMF, and 4.24 g (50.52 mmol) of sodium bicarbonate were added. The reaction mixture was heated at 100° C. overnight. After cooling, the solvent was removed on a rotary evaporator, water was added to the residue and the mixture was acidified with 1 N hydrochloric acid. The mixture was extracted three times with ethyl acetate, and the combined organic phases were washed with water, dried over sodium sulfate and concentrated on a rotary evaporator. This gave 5.05 g of the target compound. The crude product was reacted further without further purification.

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