2,2-Dimethylpyrano[2,3-f]chromen-8-one 在
potassium osmate(VI) 、 potassium ferricyanide 、 hydroquinine-2,5-diphenyl-4,6-pyrimidinediyl diether 作用下,
生成
[(1S,2S)-3,3-dimethyl-8-oxo-2-[(1S,4R)-4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carbonyl]oxy-1,2-dihydropyrano[3,2-f]chromen-1-yl] (1S,4R)-4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carboxylate