Methane → 1-(N-Chloroacetyl-carbamoyl)-2-cyanoaziridine

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반응 단계

A solution of 36 g. chloroacetyl isocyanate in 100 ml. toluene is added dropwise, while stirring and cooling, at a temperature of 20° to 30° C. to 20.4 g. 2-cyanoaziridine dissolved in 200 ml. toluene. The resulting suspension is further stirred for 1 hour at ambient temperature, then filtered with suction. The solid material obtained is washed with toluene and triturated with diethyl ether to give 62 g. of crude product. This is introduced into about 2.5 to 3 liters ethyl acetate at a temperature of 60° C., boiled for a short time and the clear solution treated with active charcoal. After filtration, the clear and still hot filtrate is evaporated in a vacuum and the evaporation residue is triturated with anhydrous diethyl ether and dried for 1 hour at 70° C. There are obtained 39.3 g. of product with a melting point of 152°-155° C. After further purification by stirring for 5 minutes with 200 ml. ethyl acetate at 60° C. and trituration of the crystals obtained with diethyl ether, there are obtained, after drying in a vacuum at 70° C. 28.9 g. 1-(N-chloroacetyl-carbamoyl)-2-cyanoaziridine; m.p. 152°-155° C.

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