反应详情

5-(4-Bromo-phenyl)-3-methyl-isoxazole-4-carboxylic acid (4 g, 14.2 mmol) was dissolved in toluene (150 mL). Triethylamine (2.187 mL, 15.6 mmol) was added, followed by diphenylphosphoryl azide (3.372 mL, 15.6 mmol), and the mixture was stirred for 10 minutes. 2-Fluoro-alpha-methylbenzyl alcohol (2 g, 15.6 mmol) was added, and the reaction was stirred at 80° C. overnight. The mixture was cooled to room temperature and concentrated, and the residue was partitioned between with EtOAc and water. The organic layer was washed 4 times with water and once with brine, and then dried, filtered, and concentrated, and the residue was purified by silica gel chromatography (dry load; 0-100% EtOAc in hexanes) to give [5-(4-bromo-phenyl)-3-methyl-isoxazol-4-yl]-carbamic acid 1-(2-fluoro-phenyl)-ethyl ester.

1. stirringthe reaction was stirred at 80° C. overnight
2. concentrationconcentrated
3. customthe residue was partitioned between with EtOAc and water
4. washThe organic layer was washed 4 times with water
5. dry with materialonce with brine, and then dried
6. filtrationfiltered
7. concentrationconcentrated
8. customthe residue was purified by silica gel chromatography (dry load; 0-100% EtOAc in hexanes)