2,2-(1,3-丙烷二基二氧基)双苯甲醛 、
butane-1,4-diyl bis(2-diazo-4,4-dimethyl-3,5-dioxohexanoate) 在
dirhodium tetraacetate 作用下,
以
苯 为溶剂,
反应 1.0h,
以53%的产率得到(4bR,6S,8aS,16aS,19S,20aR)-6,7,7,18,18,19-hexamethyl-6,7,11,12,13,14,18,19,27,28-decahydro-4bH-6,8a:16a,19-diepoxydibenzo[f,t]dipyrano[2,3-h:3',2'-r][1,5,11,16]tetraoxacyclohenicosine-8,9,16,17(20aH,26H)-tetraone