反应详情

A solution of the product of Example 18B, 2-(tert-butyldimethylsilyl)-ol (1.4 g, 5.07 mmol) and di-2-pyridyl thionocarbonate (1.07 g, 4.61 mmol) in 30 mL dichloromethane was stirred at room temperature overnight. The mixture was evaporated, then the residue was taken up in 2 mL dichloromethane and filtered through silica gel, eluting with 5% ethyl acetate-hexane. Evaporation of the filtrate afforded the product as a dark red oil (1.165 g, 72%). 1H NMR (DMSO-d6) δ 7.21 (m, 3H), 4.27 (m, 1H), 2.58-3.09 (m, 4H), 1.90 (m, 1H), 1.77 (m, 1H), 0.90 (s, 9H), 0.14 (s, 6H).

1. customThe mixture was evaporated
2. filtrationfiltered through silica gel
3. washeluting with 5% ethyl acetate-hexane
4. customEvaporation of the filtrate