反应详情

This reaction is very exothermic so care must be taken if the reaction is scaled up. Acetonitrile (100 mL) and (R)-(−)-epichlorohydrin (47 mL, 55.6 g, 0.60 mol) were added to benzenesulfonamide (20.0 g, 0.127 mol), followed by cesium carbonate (83 g, 0.255 mol). The mixture was heated at reflux for 6 hours with mechanical stirring and then was stirred overnight at room temperature. Water was added (100 mL), the organic phase separated and then concentrated under reduced pressure. The residual oil was chromatographed over silica, eluting with dichloromethane then dichloromethane:ethyl acetate (19:1), to give the sub-title compound as an oil (14.8 g, 43%).

1. temperatureThe mixture was heated
2. temperatureat reflux for 6 hours
3. stirringwas stirred overnight at room temperature
4. customthe organic phase separated
5. concentrationconcentrated under reduced pressure
6. customThe residual oil was chromatographed over silica
7. washeluting with dichloromethane