allyl 3-(1-{6-[4-(2-allyloxycarbonylethyl)-3-benzyl-2,5-dioxoimidazolin-1-yl]hexyl}-3-benzyl-2,5-dioxoimidazolin-4-yl)propionate 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下,
以
苯 为溶剂,
以95%的产率得到10,25-dibenzyl-15,20-dioxa-1,8,10,25-tetraazatricyclo[22.2.1.1
8,11]octacos-17-ene-9,14,21,26,27,28-hexaone