反应详情

The procedure of Example 1 is followed with 4-hydroxybutanal (250 g of 11.0 wt. % solution, 0.31 mol, 1.0 eq.), allyl alcohol (13.8 g, 0.24 mol, 0.80 eq.), and hexanes (500 mL). Concentrated sulfuric acid (0.5 mL) is used in place of the ion-exchange resin. After stirring for 18 h at room temperature the hexane phase contains 5.96% of 2-allyloxytetrahydrofuran (21.3 g, 70% yield). The aqueous phase contains 5.3% of 4-hydroxybutanal and 1.9% of allyl alcohol.