4-methyl-6-(2,6,6-trimethyl-cyclohex-1-enyl)-hex-3-enoic acid (S)-methoxycarbonyl-phenyl-methyl ester 在
硫酸 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
生成 (S)-phenyl-[(1S,4aS,8aS)-2-(2,5,5,8a-tetramethyl-1,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl)-acetoxy]-acetic acid methyl ester 、
(S)-phenyl-[(4aS,8aS)-2-(2,5,5,8a-tetramethyl-3,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl)-acetoxy]-acetic acid methyl ester 、 (S)-phenyl-[(1R,4aS,8aS)-2-(2,5,5,8a-tetramethyl-1,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl)-acetoxy]-acetic acid methyl ester