反应详情

Tetrakis(triphenylphosphine)palladium(0) (1.2 g) is added to a solution of Zn(CN)2 (1.2 g) and 3-(4-bromo-5-methyl-thiophen-2-yl)-5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazole (4.6 g) in DMF (12 ml). After 1 h at 120° C. in the microwave, the reaction is quenched with water (150 ml) and ethyl acetate (100 ml) and filtered over celite. The aqueous phase is separated and further extracted two times with ethyl acetate. The organic phases are combined, washed with a saturated aqueous solution of NaCl, dried over MgSO4 and concentrated in vacuo. The crude product is purified on a semi-preparative HPLC to yield 5-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-2-methyl-thiophene-3-carbonitrile (2.2 g) as a beige crystal.

1. customthe reaction is quenched with water (150 ml) and ethyl acetate (100 ml)
2. filtrationfiltered over celite
3. customThe aqueous phase is separated
4. extractionfurther extracted two times with ethyl acetate
5. washwashed with a saturated aqueous solution of NaCl
6. dry with materialdried over MgSO4
7. concentrationconcentrated in vacuo
8. customThe crude product is purified on a semi-preparative HPLC