1',6',7',8',9',9a'-Hexahydrospiro<1,3-dioxolan-2,5'-<1,9a>epoxy<5H>benzocyclohepten>-3',4'-dicarbonsaeure-dimethylester 在
di(rhodium)tetracarbonyl dichloride 作用下,
以
氯仿 为溶剂,
反应 48.0h,
以71%的产率得到6,7,8,9-Tetrahydrospiro<5H-benzocyclohepten-5,2'-<1,3>dioxolan>-3,4-dicarbonsaeure-dimethylester