Versatile Access to N-Functionalized Iminosydnones by Carbonylimidazolium Activation

A new methodology for N-exocyclic functionalization of iminosydnones was developed involving the addition of a large variety of nucleophiles on carbonyl-imidazolium activated iminosydnones. This practical and highly versatile method pro-vided access to new classes of iminosydnones and opened a straight-forward synthetic route to prepare iminosydnone-based prodrugs.