SmI2-Induced Ring Expansion Reactions of Alkyl (n+1)-Oxobicyclo[n.1.0]alkane-1-carboxylates.

Alkyl 4-oxocycloalkanecarboxylates were prepared in good yield via ring expansion reactions of alkyl (n+1)-oxobicyclo[n.1.0]alkane-1-carboxylates mediated by SmI2-induced single electron transfer in THF/MeOH.