(1S,3S,4S,5R,6R,7R)-4,7-Diacetoxy-1-((4S,5R)-4-acetoxy-5-methyl-3-methylene-6-phenyl-hexyl)-6-((E)-(4S,6S)-4,6-dimethyl-oct-2-enoyloxy)-2,8-dioxa-bicyclo[3.2.1]octane-3,4,5-tricarboxylic acid 3,5-di-tert-butyl ester 在
盐酸 、
草酰氯 、
N,N-二甲基甲酰胺 作用下,
以
1,4-二氧六环 、
二氯甲烷 为溶剂,
生成
(1S,3S,4S,5R,6R,7R)-7-Acetoxy-1-((4S,5R)-4-acetoxy-5-methyl-3-methylene-6-phenyl-hexyl)-6-((E)-(4S,6S)-4,6-dimethyl-oct-2-enoyloxy)-4-hydroxy-2,8-dioxa-bicyclo[3.2.1]octane-3,4,5-tricarboxylic acid