2-Diazo-1-(6-methoxy-1-methyl-1,2,3,4,9,10-hexahydro-phenanthren-1-yl)-ethanone 在
三氟化硼乙醚 作用下,
以
硝基甲烷 为溶剂,
反应 5.0h,
生成
(7aS,9aR)-3-Methoxy-7a-methyl-7,7a,10,11-tetrahydro-6H-cyclobuta[j]phenanthren-8-one 、 (+/-)-4aβ-hydroxy-6-methoxy-4α-methyl-1,2,3,4,4a,9,10,10a-octahydro-4β,10aβ-ethanophenanthren-12-one