bis[(1R,2S,5R)-5-methyl-2-propan-2-ylcyclohexyl] 2-[(5-benzoyloxy-4-oxopyran-2-yl)methyl]-2-prop-2-enylpropanedioate 在
zinc dibromide 作用下,
以
邻二氯苯 为溶剂,
反应 15.0h,
以76%的产率得到bis[(1R,2S,5R)-5-methyl-2-propan-2-ylcyclohexyl] (1S,5S,7R)-9-benzoyloxy-8-oxo-11-oxatricyclo[5.3.1.01,5]undec-9-ene-3,3-dicarboxylate