乙烯基乙醚 、
(E)-8-[2-Formyl-4-hydroxy-cyclohex-2-en-(E)-ylidene]-4-methyl-oct-2-enoic acid methyl ester 在
tris(6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionato)ytterbium 作用下,
反应 12.0h,
以12%的产率得到(3R,3aR,5R,6aR,7R,7aS,8R,11aS)-5-Ethoxy-3-hydroxy-8-methyl-1,2,3,3a,4,5,6a,7,7a,8,9,10,11,11a-tetradecahydro-6-oxa-benzo[de]anthracene-7-carboxylic acid methyl ester