Acetic acid (S)-3-benzyloxymethoxy-4-{(4S,6S)-6-[(4S,6R)-6-((2R,4S,6R)-2-benzyloxymethoxy-4,6,7-trihydroxy-heptyl)-2,2-dimethyl-[1,3]dioxan-4-ylmethyl]-2,2-dimethyl-[1,3]dioxan-4-yl}-butyl ester 在
camphor-10-sulfonic acid 、
potassium carbonate 作用下,
以
甲醇 、
丙酮 为溶剂,
生成 (4S,6S)-4-[[(4S)-2,2-dimethyl-1,3-dioxan-4-yl]methyl]-6-[[(4S,6S)-6-[[(4S,6R)-6-[[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]methyl]-2,2-dimethyl-1,3-dioxan-4-yl]methyl]-2,2-dimethyl-1,3-dioxan-4-yl]methyl]-2,2-dimethyl-1,3-dioxane