(2R,3S)-1-[(4S,6R)-6-((R)-2,2-Dimethyl-[1,3]dioxan-4-ylmethyl)-2,2-dimethyl-[1,3]dioxan-4-yl]-3-[(4R,5S,6S)-2,2,5-trimethyl-6-((4R,5R)-2,2,5-trimethyl-[1,3]dioxan-4-ylmethyl)-[1,3]dioxan-4-yl]-butan-2-ol 、
乙酸酐 在
4-二甲氨基吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 18.0h,
以2%的产率得到Acetic acid (1R,2S)-1-[(4R,6R)-6-((R)-2,2-dimethyl-[1,3]dioxan-4-ylmethyl)-2,2-dimethyl-[1,3]dioxan-4-ylmethyl]-2-[(4S,5S,6S)-2,2,5-trimethyl-6-((4R,5R)-2,2,5-trimethyl-[1,3]dioxan-4-ylmethyl)-[1,3]dioxan-4-yl]-propyl ester