methyl (4'aS,7'R,8'aR)-4',7'-dimethyl-3'-prop-2-enoxyspiro[1,3-dioxolane-2,6'-5,7,8,8a-tetrahydro-2H-chromene]-4'a-carboxylate 在
lithium aluminium tetrahydride 作用下,
以
乙醚 为溶剂,
反应 0.5h,
以94%的产率得到rac-((4aR,7R,8aR)-3-(allyloxy)-4,7-dimethyl-8,8a-dihydro-2H,5H-spiro[chromene-6,2'-[1,3]dioxolan]-4a(7H)-yl)methanol