反应详情

To a solution of 3,5-dimethyl-4-[2-(methoxy)-5-nitrophenyl]isoxazole (for a preparation see intermediate 3, 1.7 g, 6.85 mmol, 1 eq.) in ethanol (170 ml), was added Pd/C (10% on carbon, 85 mg) and the reaction was stirred under hydrogen for 4 h. AcOH (1.7 ml) was added and the reaction was hydrogenated for 20 h. After filtration, the solvent was evaporated in vacuo. The crude compound was dissolved into DCM and washed with saturated aqueous Sodium hydrogen carbonate, dried over Na2SO4, filtered and evaporated. The title compound was obtained as a red oil (1.38 g, 88%). GC/MS m/z: 218.

1. waitthe reaction was hydrogenated for 20 h
2. filtrationAfter filtration
3. customthe solvent was evaporated in vacuo
4. dissolutionThe crude compound was dissolved into DCM
5. washwashed with saturated aqueous Sodium hydrogen carbonate
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. customevaporated