反应详情

温度

150 °C

A solution of Intermediate 71 (313 mg) in toluene (6 ml) was added with tetrakis(triphenylphosphine)palladium(0) (17.9 mg, Aldrich), tetramethyltin (165 μl, Kanto Chemicals) and 2,6-di-tert-butyl-4-methylphenol (several pellets, Tokyo Kasei Kogyo) and stirred in a sealed tube at 150° C. for 48 hours. The reaction mixture was cooled to room temperature, filtered through Celite and concentrated under reduced pressure. The residue was added with saturated brine (30 ml) and extracted three times with ethyl acetate (30 ml for each time). The organic layers were combined and dried over anhydrous sodium sulfate, and then the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=2:1) to obtain the title compound (61.7 mg).

1. temperatureThe reaction mixture was cooled to room temperature
2. filtrationfiltered through Celite
3. concentrationconcentrated under reduced pressure
4. additionThe residue was added with saturated brine (30 ml)
5. extractionextracted three times with ethyl acetate (30 ml for each time)
6. dry with materialdried over anhydrous sodium sulfate
7. customthe solvent was evaporated under reduced pressure
8. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=2:1)