反应详情

A mixture of the 32 (800 mg, 2.23 mmol) in 20 mL of acetic acid and 100 mL of water, taken in a 250 mL round bottom flask were refluxed for 12 h. The reaction mixture was cooled and extracted with dichloromethane (3×25 mL) and the combined organic phases were dried over magnesium sulfate. The solvent evaporated and the crude product was purified by flash column chromatography (10:90 EtOAc:Hexanes), to afford 690 mg (91%) of 2 as white crystals. Rf: 0.43 (30:70, EtOAc:Hexanes).

1. customtaken in a 250 mL round bottom flask
2. temperaturewere refluxed for 12 h
3. temperatureThe reaction mixture was cooled
4. extractionextracted with dichloromethane (3×25 mL)
5. dry with materialthe combined organic phases were dried over magnesium sulfate
6. customThe solvent evaporated
7. customthe crude product was purified by flash column chromatography (10:90 EtOAc:Hexanes)