反应详情

温度

3 °C

Butyllithium was added to an Et2O (80 mL) solution of tert-butyl-(chroman-4-yloxy)-dimethyl-silane (6.21 g, 23.5 mmol) at −80° C. After stirring the mixture at 3° C. for 15 h, DMF (10 mL) was added at 0° C. Following a 30 min stirring at RT, the reaction was quenched with saturated NH4Cl solution. The reaction was diluted with Et2O (200 mL) and washed with brine. The organic phase was dried over MgSO41 filtered, and concentrated in vacuo to provide the crude compound (40% conversion by 1H NMR) which was purified by column chromatography (silica, 0 to 10% ether in hexane) to provide the title compound.

1. waitFollowing a 30 min
2. stirringstirring at RT
3. customthe reaction was quenched with saturated NH4Cl solution
4. additionThe reaction was diluted with Et2O (200 mL)
5. washwashed with brine
6. customThe organic phase was dried over MgSO41
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customto provide the crude compound (40% conversion by 1H NMR) which
10. customwas purified by column chromatography (silica, 0 to 10% ether in hexane)