重氮甲烷 、 (4R,4aR,6aS,7aS,10R,10aR,11aR,11bR,12R)-7a-isopropyl-4,11b-dimethyl-9-oxotetradecahydro-1H-6a,10-methanophenanthro[2,3-b]furan-4,12-dicarboxylic acid 在
乙醚 作用下,
生成
dimethyl (4R,4aR,6aS,7aS,10R,10aR,11aR,11bR,12S)-7a-isopropyl-4,11b-dimethyl-9-oxotetradecahydro-1H-6a,10-methanophenanthro[2,3-b]furan-4,12-dicarboxylate