反应详情

A solution of alcohol 18 (2.20 g, 8.78 mmol) in dichloromethane (15 mL) was treated with DMAP (215 mg, 1.8 mmol), TBSCl (1.59 g, 10.5 mmol), and triethylamine (1.8 mL, 13.2 mmol). The reaction was stirred for 24 h and then saturated sodium bicarbonate solution (50 mL) was added. The mixture was extracted with dichloromethane (2×50 mL) and the combined dichloromethane solution dried (Na2SO4), filtered and evaporated. Purification by flash chromatography (4% ethyl acetate/hexane) gave 3.06 g (6.4 mmol, 73%) of the protected alcohol (19).

1. extractionThe mixture was extracted with dichloromethane (2×50 mL)
2. dry with materialthe combined dichloromethane solution dried (Na2SO4)
3. filtrationfiltered
4. customevaporated
5. customPurification by flash chromatography (4% ethyl acetate/hexane)