Ammonia → HCID 69560371, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of (E)-3-(5-phenyl-4-isoxazolyl)propenoic acid (0.97 g), triethylamine (1 ml) and tetrahydrofuran (60 ml) was added ethyl chlorocarbonate (0.5 ml) at −30° C. and the mixture was stirred at −20° C. for 1 hr. To the obtained mixture was added aqueous ammonia (1 ml), and the mixture was stirred at room temperature for 1 hr. The reaction mixture was poured into water and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with dilute hydrochloric acid, saturated aqueous sodium hydrogencarbonate and then saturated brine, dried (MgSO4) and concentrated to give (E)-3-(5-phenyl-4-isoxazolyl)propenamide (0.86 g, yield 89%) as colorless crystals. The crystals were recrystallized from acetone-hexane. melting point: 194–196° C.

Provenance & Evidence