反应详情

To a suspension of daidzein (2.0 g, 7.87 mmol) in acetone (80 ml) 2 N aqueous potassium hydroxide (3.94 ml, 7.87 mmol) was added, and the mixture was sonicated for a few minutes. To this mixture was added 3-chloromethyl-5-(3-trifluoromethylphenyl)-[1,2,4]oxadiazole (2.17 g, 8.26 mmol), and the reaction mixture was refluxed for 3 days. The mixture was concentrated under reduced pressure, and the residue dissolved in methanol, mixed with silica gel, and the solvent removed under reduced pressure. Purification by flash column chromatography, eluting with methylene chloride/methanol (95/5 to 90/10) provided pure 3-(4-hydroxyphenyl)-7-({5-[3-(trifluoromethyl)phenyl]-(1,2,4-oxadiazol-3-yl)}methoxy)chromen-4-one as a white solid.

1. additionwas added
2. customthe mixture was sonicated for a few minutes
3. temperaturethe reaction mixture was refluxed for 3 days
4. concentrationThe mixture was concentrated under reduced pressure
5. dissolutionthe residue dissolved in methanol
6. additionmixed with silica gel
7. customthe solvent removed under reduced pressure
8. customPurification by flash column chromatography
9. washeluting with methylene chloride/methanol (95/5 to 90/10)