反应详情

温度

-78 °C

A 1.3M solution of s-BuLi in cyclohexane (10.5 mL, 13.6 mmol) was added to a dry ice/acetone cooled solution of TMEDA (1 mL, 6.5 mmol) in THF (10 mL), followed by the dropwise addition of the compound of example f (1.0 g, 5.45 mmol) in THF (10 mL). Phenyl methyl vinyl chlorosilane (1.5 g, 8.2 mmol) was added after 30 min, and the mixture was stirred at −78° C. for 2 h. This was poured into 25% aq citric acid and partitioned between EtOAc and water. The EtOAc was dried (MgSO4), concentrated, and purified by HPLC with 1:19 EtOAc/cyclohexane to afford 0.56 g of a white solid which was recrystallized from EtOAc/petroleum ether at low temperature to give 0.194 g of title compound, an 11% yield. m.p. 85-87° C.

1. custompartitioned between EtOAc and water
2. dry with materialThe EtOAc was dried (MgSO4)
3. concentrationconcentrated
4. custompurified by HPLC with 1:19 EtOAc/cyclohexane