azidomethyl pivalate 、
methyl (2S,4aR,6aR,7R,9S,10aS,10bR)-9-acetoxy-2-ethynyl-6a,10b-dimethyl-4,10-dioxododecahydro-2H-benzo[f]isochromene-7-carboxylate 在
copper(ll) sulfate pentahydrate 、
sodium ascorbate 作用下,
以
水 、
叔丁醇 为溶剂,
以88%的产率得到methyl (2S,4aR,6aR,7R,9S,10aS,10bR)-9-acetyloxy-2-[1-(2,2-dimethylpropanoyloxymethyl)triazol-4-yl]-6a,10b-dimethyl-4,10-dioxo-2,4a,5,6,7,8,9,10a-octahydro-1H-benzo[f]isochromene-7-carboxylate