(-)-2-methylpent-4-enoic acid [(2S,3S,4R,2'R,4'S,5'S)-1-(5-allyl-4-methyltetrahydrofuran-2-yl)-2-(tert-butyldiphenylsilanyloxy)-3-methoxymethoxy-4-methyl-6-one]undec-8-yl ester 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
生成 (E)-(1S,6S,9R,13R,14S,17R,19S)-(-)-15-tert-butyldiphenylsilyloxy-14-methoxymethoxy-6,13,19-trimethyl-9-propyl-8,20-dioxa-bicyclo[15.2.1]eicosane-3-en-7,11-dione 、 (Z)-(1S,6S,9R,13R,14S,17R,19S)-(-)-15-tert-butyldiphenylsilyloxy-14-methoxymethoxy-6,13,19-trimethyl-9-propyl-8,20-dioxa-bicyclo[15.2.1]eicosane-3-ene-7,11-dione