反应详情

温度

80 °C

To a solution of 4-cyclopropyl-5-phenylisoxazole-3-carboxylic acid (22 mg, 0.096 mmol), HOBt (26.5 mg, 0.173 mmol), and diisopropylethylamine (0.067 mL, 0.384 mmol) in acetonitrile (1 mL) was added EDC (43.2 mg, 0.226 mmol) and (Z)-tert-butyl 1-(4-(N′-hydroxycarbamimidoyl)benzyl)azetidine-3-carboxylate (Int.1, 29.3 mg, 0.096 mmol). The reaction mixture was stirred at 80° C. for 2 h. The reaction mixture was concentrated, and the residue was purified by preparative HPLC to give tert-butyl 1-(4-(5-(4-cyclopropyl-5-phenylisoxazol-3-yl)-1,2,4-oxadiazol-3-yl)benzyl)azetidine-3-carboxylate.

1. concentrationThe reaction mixture was concentrated
2. customthe residue was purified by preparative HPLC