(3a
S)-4
c-acetoxy-2,2-dimethyl-(3a
r,8a
t,8b
c)-3a,4,5,8,8a,8b-hexahydro-[1,3]dioxolo[4,5-
e]indazole-5a
t-carboxylic acid methyl ester 在
对甲苯磺酸 作用下,
以
苯 为溶剂,
生成
(3aS)-6-acetyl-4c-hydroxy-2,2-dimethyl-(3ar,8at,8bc)-3a,4,5,6,8a,8b-hexahydro-[1,3]dioxolo[4,5-e]indazole-5at-carboxylic acid methyl ester