、
(+/-)-7-allyloxy-7-{2-[l-(4-methoxyphenyl)but-3-enyloxy]-phenylcarbamoyl}-heptanoic acid methyl ester 、
吡啶 以
hexanes 、
乙酸乙酯 为溶剂,
以After the first step, intermediate macrocyclic olefin (46 mg, 45% yield) was obtained as a pale yellow oil (mixture of E/Z isomers) (flash chromatography, gradient EtOAc in hexanes 10% to 30%)的产率得到