[(1R,2R,5R,6S)-2,5-diacetyloxy-4-(triethylsilyloxymethyl)-7-oxabicyclo[4.1.0]hept-3-en-3-yl]methyl acetate 在
pyridinium chlorochromate on silica gel 作用下,
以80%的产率得到[(1R,2R,5R,6S)-2,5-diacetyloxy-4-formyl-7-oxabicyclo[4.1.0]hept-3-en-3-yl]methyl acetate