Acetic acid (S)-3-benzyloxymethoxy-4-((4S,6S)-6-{(4S,6R)-6-[(S)-2-benzyloxymethoxy-3-((4R,6R)-6-hydroxymethyl-2,2-dimethyl-[1,3]dioxan-4-yl)-propyl]-2,2-dimethyl-[1,3]dioxan-4-ylmethyl}-2,2-dimethyl-[1,3]dioxan-4-yl)-butyl ester 、
2,2-二甲氧基丙烷 在
palladium dihydroxide potassium carbonate 、
氢气 、 camphor-10-sulfonic acid 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