tri(propan-2-yl)silyl 2-[(2R,4S,6R,8R,10S)-10-acetyloxy-2-[(Z)-4-hydroxybut-1-enyl]-4-methyl-4-triethylsilyloxy-1,7-dioxaspiro[5.5]undecan-8-yl]acetate 、
5-((4-methoxybenzyl)oxy)pentanoic acid 在
4-二甲氨基吡啶 、
N,N'-二环己基碳二亚胺 作用下,
以
二氯甲烷 为溶剂,
以88%的产率得到(Z)-4-((2R,4S,6R,8R,10S)-10-acetoxy-4-methyl-8-(2-oxo-2-((triisopropylsilyl)oxy)ethyl)-4-((triethylsilyl)oxy)-1,7-dioxaspiro[5.5]undecan-2-yl)but-3-en-1-yl 5-((4-methoxybenzyl)oxy)pentanoate