(-)-(1S)-menthyl 5-exo,6-exo-(isopropylidenedioxy)bicyclo<2.2.1>hept-2-ene-2-carboxylate 在
二甲基硫 、
臭氧 作用下,
生成 ((3aS,4R,6S,6aR)-6-Formyl-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxol-4-yl)-oxo-acetic acid (1R,2S,5R)-2-isopropyl-5-methyl-cyclohexyl ester