(3S)-3-methyl-4-trityloxybut-1-ene 、
methyl (3S)-3-[tert-butyl(dimethyl)silyl]oxy-5-[(4S,5R)-5-ethenyl-2,2,4-trimethyl-1,3-dioxolan-4-yl]pentanoate 在
Hoveyda-Grubbs catalyst second generation 作用下,
以
二氯甲烷 为溶剂,
反应 38.0h,
以76%的产率得到(S)-3-(tert-butyl-dimethyl-silanyloxy)-5-[(4S,5R)-2,2,4-trimethyl-5-((E)-(R)-3-methyl-4-trityloxy-but-1-enyl)-[1,3]dioxolan-4-yl]-pentanoic acid methyl ester