反应详情

A mixture of 3-(4-bromo-3-methyl-phenyl)-5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazole (500 mg), 1,4-butandiol-monovinyl-ether (385 mg), palladium on charcoal (10%, 23 mg), 1,3-bis(diphenylphosphino)propane (9 mg), dicyclohexylamine (259 mg) and n-butanol (3 mL) were refluxed over night. Ethyl acetate (30 mL) and aqueous acetic acid (1 M, 20 mL) were added, and left at room temperature for 1 h. After separation of the layers, the organic layer was washed with HCl (1 M, 10 mL), dried (Na2SO4) and concentrated in vacuum. The residue was purified by flash chromatography on silica gel to yield the title compound (270 mg, 60%).

1. temperaturewere refluxed over night
2. customAfter separation of the layers
3. washthe organic layer was washed with HCl (1 M, 10 mL)
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated in vacuum
6. customThe residue was purified by flash chromatography on silica gel