反应详情

A mixture of 110 g (0.56 mol) of 2-(1-bromopropan-2-yl)-1,3-dioxolane, 148.5 g (0.56 mol) of triphenylphosphine and 550 ml of anhydrous toluene is heated at reflux under nitrogen for 24 h. The paste-like salt phase is separated and washed with 5×200 ml of anhydrous ethyl ether. After drying under vacuum there are obtained 191 g of [2-(1,3-dioxolan-2-yl)propan-1-yl]triphenylphosphonium bromide (white solid; yield 75%).

1. temperatureis heated
2. temperatureat reflux under nitrogen for 24 h
3. customThe paste-like salt phase is separated
4. washwashed with 5×200 ml of anhydrous ethyl ether
5. customAfter drying under vacuum