Butyric acid (3aR,4S,7R,7aS)-7-butyryloxy-2,2-dimethyl-3a,4,7,7a-tetrahydro-benzo[1,3]dioxol-4-yl ester 在
sodium hydroxide 、
2-amino-6-hydroxy-4,7-dimethylbenzothiazole 作用下,
以
水 为溶剂,
以96%的产率得到(1R,2S,3R,4S)-4-butyryloxy-2,3-isopropylidenedioxy-5-cyclohexen-1-ol