(E)-ethyl 2-acetyl-5-methyl-6-(3-methylbut-2-enyloxy)hex-4-enoate 在
水 、
copper(II) acetate monohydrate 、
manganese(III) triacetate dihydrate 作用下,
以
乙醇 为溶剂,
反应 5.0h,
生成 ethyl 5-hydroxy-1,1,5-trimethyl-1,4a,5,6,8,8a-hexahydropyrano[3,4-c]pyran-3-carboxylate 、 ethyl 5-hydroxy-1,1,5-trimethyl-1,4a,5,6,8,8a-hexahydropyrano[3,4-c]pyran-3-carboxylate 、 ethyl 5-hydroxy-1,1,5-trimethyl-1,4a,5,6,8,8a-hexahydropyrano[3,4-c]pyran-3-carboxylate