反应详情

温度

100 °C

To a solution of 1-(3-bromobenzyl)-5-methyl-1H-1,2,4-triazole-3-carbohydrazide (682 mg, 2.19 mmol), dissolved in POCl3 (6 mL), 4-(trifluoromethoxy)benzoic acid (453 mg, 2.19 mmol) was added. The reaction was heated to 100° C. for 2.5 h. The solvent was removed under reduced pressure and the crude material was taken up in EtOAc. The organic layer was then washed with NaHCO3 (3×40 mL) and brine (1×40 mL), dried over Na2SO4, filtered, concentrated under reduced pressure and purified on a Biotage pre-packed silica gel column (MeOH:DCM 2% to 40% MeOH) to afford 2-(1-(3-bromobenzyl)-5-methyl-1H-1,2,4-triazol-3-yl)-5-(4-(trifluoromethoxy)phenyl)-1,3,4-oxadiazole (443 mg, 42%). MS (ES+) C19H13BrF3N5O2 requires: 479, 481 found: 480, 482 [M+H]+(1:1).

1. customThe solvent was removed under reduced pressure
2. washThe organic layer was then washed with NaHCO3 (3×40 mL) and brine (1×40 mL)
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure
6. custompurified on a Biotage pre-packed silica gel column (MeOH:DCM 2% to 40% MeOH)