Water → HCID 18953985, compound

Participants

Reaction Conditions

Reaction Steps

A suspension of 12.38 g (45 mmol) of the crude N-(4-nitrophenyl)-3-pyrrolidyl-2-butenamide in 200 ml of dry dichloromethane was cooled to 0° C. and 7.50 g (49.5 mmol) of ethyl chlorooximidoacetate were added in one portion. The reaction mixture was stirred at -5° C. to 0° C. for 2 hours and was then poured into 200 ml of water. The aqueous layer was extracted with 100 ml of dichloromethane and the combined organic extract was washed with 100 ml of 10% HCl, 5% NaHCO3 solution and then dried over MgSO4. Evaporation of the solvent gave 10.91 g (76%) of ethyl 5-methyl-4-[N-(4-nitrophenyl)]carbamoyl-3-isoxazolecarboxylate as a white crystalline solid melting at 151°-53° C. (from ethyl acetate);

Provenance & Evidence