1,1,20,20-tetraphenyl-1,19-icosanediene 、
1,4-Bis-<β-(acetoacetoxy)-aethoxy>-benzol 在
manganese triacetate 作用下,
以
溶剂黄146 为溶剂,
反应 1.17h,
以44%的产率得到8,31-Dimethyl-10,10,29,29-tetraphenyl-2,5,9,30,34,37-hexaoxatetracyclo[36.2.2.07,11.028,32]dotetraconta-1(41),7,31,38(42),39-pentaene-6,33-dione