反应详情

温度

0 °C

A solution of (4-(tert-Butyldimethylsilyloxy)-3-ethoxyphenyl)methyltriphenyl-phosphonium bromide (28.7 g, 41.6 mmol, 1.0 equiv.) in THF (90 mL), was cooled to 0° C. After adding n-BuLi (1.6 M in hexanes, 26 mL, 41.6 mmol, 1.0 equiv.) at 0° C., the red suspension was stirred at 0° C. for 15 min. 4-(4-(Tert-butyldimethylsilyloxy)phenyl)butan-2-one (12.9 g, 41.6 mmol, 1.0 equiv.) in THF (30 mL) was added, and the mixture was stirred at 0° C.→70° C. for 16 h. After addition of H2O at 25° C., the aqueous layer was extracted with hexanes (2×), the combined organic phases were washed with brine, dried (MgSO4), filtered and the filtrate was concentrated. The residue was purified by flash chromatography on SiO2 (cyclohexane/EtOAc 98:2) to give tert-butyl(4-(4-(4-((tert-butyldimethylsilyl)oxy)-3-ethoxyphenyl)-3-methylbut-3-en-1-yl)phenoxy)dimethylsilane as a colorless oil.

1. stirringthe mixture was stirred at 0° C.→70° C. for 16 h
2. extractionthe aqueous layer was extracted with hexanes (2×)
3. washthe combined organic phases were washed with brine
4. dry with materialdried (MgSO4)
5. filtrationfiltered
6. concentrationthe filtrate was concentrated
7. customThe residue was purified by flash chromatography on SiO2 (cyclohexane/EtOAc 98:2)