2,2'-(((3aR,4R,6R,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methylene)bis(5,5-dimethylcyclohexane-1,3-dione) 在
吡啶 作用下,
以
乙酸酐 为溶剂,
反应 2.0h,
以97%的产率得到9-((3aR,4R,6R,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione