[(1S,2R,6R,7S)-9-methyl-4-oxo-3-oxatricyclo[8.4.0.02,6]tetradec-9-en-7-yl] acetate 在
bismuth(lll) trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
反应 48.0h,
以57%的产率得到(3aS,4S,10aS,10bs)-6-methyl-2-oxo-3,3a,4,5,7,8,9,10,10a,10bdecahydro-2H-cyclohepta[ij]isochromen-4-yl acetate