反应详情

After adding 0.887 g of 4-(5-methyl-[1,2,4]oxadiazol-3-yl)phenylamine, 0.831 g of 3,4-dimethoxybenzaldehyde, 1g of MS3A and 1 ml of trimethylsilyl cyanide to a solution of 0.31 g of Yb(OTf)3 in 20 ml of dichloromethane under a nitrogen atmosphere, the mixture was stirred at room temperature for 22 hours. After then adding 200 ml of ethyl acetate to the reaction mixture, it was filtered through celite and the celite was washed with 200 ml of ethyl acetate. The organic layers were combined and washed with water and saturated brine, and then dried over anhydrous magnesium sulfate. The desiccating agent was filtered off and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate-heptane) to give the title compound (1.75 g) as a light yellow solid.

1. filtrationwas filtered through celite
2. washthe celite was washed with 200 ml of ethyl acetate
3. washwashed with water and saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationThe desiccating agent was filtered off
6. concentrationthe filtrate was concentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (ethyl acetate-heptane)