在
甲醇 、
4-甲基苯磺酸吡啶 作用下,
以
四氢呋喃 为溶剂,
以79%的产率得到prop-2-enyl (2R,3S,4S,6R,7R,8E,10S,13S,14R,15S,16R,17S,18E,20S,21Z)-2,7-bis[[tert-butyl(dimethyl)silyl]oxy]-15-[(3,4-dimethoxyphenyl)methoxy]-17-hydroxy-16-(hydroxymethyl)-3-methoxy-4,6,8,10,14,18,20-heptamethyl-5,11-dioxo-13-(2-trimethylsilylethoxymethoxy)tricosa-8,18,21-trienoate