[(3S,7S,8R,10E,12E,15S,16R,17Z,19E)-18-bromo-16-[tert-butyl(dimethyl)silyl]oxy-7-[(4-methoxyphenyl)methoxy]-8-methyl-9,21-dioxo-15-[(2S,3R,4R,5S,6S)-3,4,5-trimethoxy-6-methyloxan-2-yl]oxyhenicosa-10,12,17,19-tetraen-3-yl] 2-diethoxyphosphorylacetate 在
N,N-二异丙基乙胺 、
lithium chloride 作用下,
以
乙腈 为溶剂,
反应 12.0h,
以78%的产率得到(1S,2E,6S,10S,11R,13E,15S,16S,18S,19R,20S)-21-bromo-19-[tert-butyl(dimethyl)silyl]oxy-6-ethyl-10-[(4-methoxyphenyl)methoxy]-11-methyl-18-[(2S,3R,4R,5S,6S)-3,4,5-trimethoxy-6-methyloxan-2-yl]oxy-5-oxatricyclo[13.7.0.016,20]docosa-2,13,21-triene-4,12-dione