methyl(1S,5S,9S,10R)-16-[3-(E)-crotonylthiazolidin-2-yl]-15,16-epoxy-8(17),13(16),14-labdatrien-18-oate 以
苯 为溶剂,
反应 10.0h,
以89%的产率得到methyl (1S,4aS,5S,8aR)-1,4a-dimethyl-5-(2-(5aSR,6SR,7SR,9aRS,9bSR)-{6-methyl-5(5aH)-oxo-7,9a-epoxy-2,3,6,7,9a,9b-hexahydrothiazolo[2,3-a]isoindol-9yl}ethyl)-6-methylenedecahydronaphthalene-1-carboxylate