3,6-epoxy-3,6-dihydrotribenzocycloheptatrienone 、
丹酚 A 以
甲苯 为溶剂,
反应 48.75h,
以32%的产率得到(2S,4aR,6aR,7R,9S,10aS,10bR)-methyl 9-acetoxy-2-(8,8a,9,12,12a,13-hexahydro-8,13:9,12-diepoxy-5H-dibenzo[3,4:6,7]-cyclohept[1,2]naphthanen-5-on-10-yl)-6a,10b-dimethyl-4,10-dioxododecahydro-1H-benzo[f]isochromene-7-carboxylate