[(9R,10R)-3-(acetoxymethyl)-8,8-dimethyl-2-oxo-9-[(1R,4S)-1,7,7-trimethyl-2-oxo-3-oxabicyclo[2.2.1]heptane-4-carbonyl]oxy-9,10-dihydropyrano[2,3-f]chromen-10-yl] (1R,4S)-1,7,7-trimethyl-2-oxo-3-oxabicyclo[2.2.1]heptane-4-carboxylate 在
盐酸 作用下,
以
乙醇 为溶剂,
反应 4.0h,
以87%的产率得到[(9R,10R)-3-(hydroxymethyl)-8,8-dimethyl-2-oxo-9-[(1S,4R)-4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carbonyl]oxy-9,10-dihydropyrano[2,3-f]chromen-10-yl] (1S,4R)-4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carboxylate