Dicyclohexylcarbodiimide → N,N'-Dicyclohexylurea

Participants

Reaction Conditions

Reaction Steps

2.15 g. Dicyclohexylcarbodiimide are introduced portionwise at 0° to 5° C. into a suspension of 1.03 g. carbamoylacetic acid and 0.68 g. 2-cyanoaziridine in 18 ml. tetrahydrofuran. The reaction mixture is stirred for 1 hour at 0° C. and then for 2 hours at ambient temperature. It is then filtered with suction and the solid material is washed with tetrahydrofuran and diethyl ether into the filtrate, 2.2 g. dicyclohexylurea (m.p. 226°-228° C.) being obtained. The filtrate is evaporated in a vacuum and the evaporation residue is triturated with ether to give 1.3 g. 1-carbamoylacetyl-2-cyanoaziridine; m.p. 115°-119° C.

Provenance & Evidence