acetoacetate diester of diethylene glycol 、
4,7-dioxa-1,1,10,10-tetraphenyldeca-1,9-diene 在
manganese(III) triacetate dihydrate 、
溶剂黄146 作用下,
反应 0.83h,
以63%的产率得到12,25-dimethyl-3,6,9,13,17,20,24-heptaoxa-2,10-dioxo-14,14,23,23-tetraphenyltricyclo[20.3.0.0(11,15)]pentacosa-11,25-diene