反应详情

温度

60 °C

5-(4-Bromo-phenyl)-3-methyl-isoxazole-4-carboxylic acid (1 g, 3.6 mmol), triethylamine (1 mL, 7.2 mmol) and diphenylphosphoryl azide (1.98 g, 7.2 mmol) were placed in toluene (20 mL) and heated to 60° C. for 20 minutes. Benzoic acid hydrazide (0.98 g, 7.2 mmol) was added in a single portion and the reaction was heated and stirred for 2 hours. The reaction was cooled and submitted to aqueous workup. The crude material was dissolved in dioxane (100 mL), phosphorous(V) oxychloride was added and the reaction was heated to 100° C. overnight. The reaction was cooled and worked up and the residue was purified on silica gel (0-80% EtOAc in hexanes) to yield the title compound.

1. temperaturethe reaction was heated
2. temperatureThe reaction was cooled
3. temperaturethe reaction was heated to 100° C. overnight
4. temperatureThe reaction was cooled
5. customthe residue was purified on silica gel (0-80% EtOAc in hexanes)