xylitan 、
乙酰丙酸乙酯 在
对甲苯磺酸 作用下,
反应 24.0h,
生成 ethyl 3-[(2R,4aS,7R,7aS)-7-hydroxy-2-methyl-4a,6,7,7a-tetrahydro-4H-furo[3,2-d][1,3]dioxin-2-yl]propanoate 、 ethyl 3-[(2S,4aS,7R,7aS)-7-hydroxy-2-methyl-4a,6,7,7a-tetrahydro-4H-furo[3,2-d][1,3]dioxin-2-yl]propanoate 、 ethyl 3-[(2R,4aR,7S,7aR)-7-hydroxy-2-methyl-4a,6,7,7a-tetrahydro-4H-furo[3,2-d][1,3]dioxin-2-yl]propanoate 、 ethyl 3-[(2S,4aR,7S,7aR)-7-hydroxy-2-methyl-4a,6,7,7a-tetrahydro-4H-furo[3,2-d][1,3]dioxin-2-yl]propanoate