反应详情

温度

20 °C

2-{[tert-Butyl(dimethyl)silyl]oxy}ethanol (1.82 g), 1,6-dibromohexane (7.56 g) and tetrabutylammonium bromide (0.067 g) were stirred under nitrogen and treated with 50% w/v sodium hydroxide (2 g in 4 ml). The mixture was stirred vigorously at 20° C. for 5 days. Water (100 ml) was added, and the product extracted with dichloromethane (3×50 ml). The combined organic layer was separated and dried over Na2SO4 before filtering. The solvent was evaporated in vacuo to give a residue which was purified by flash chromatography on silica. Elution with 5% ether/cyclohexane followed by solvent evaporation in vacuo gave the title compound (2.35 g). LCMS RT=4.32 min, ES +ve 339 (MH)+.

1. extractionthe product extracted with dichloromethane (3×50 ml)
2. customThe combined organic layer was separated
3. dry with materialdried over Na2SO4
4. filtrationbefore filtering
5. customThe solvent was evaporated in vacuo
6. customto give a residue which
7. customwas purified by flash chromatography on silica
8. washElution with 5% ether/cyclohexane
9. customfollowed by solvent evaporation in vacuo