Unsymmetrical relay C–H alkenylation and [2 + 2] cycloaddition ofN-arylsydnones with allenyl acetates leading to quinoline-fused cyclobutanes

Abstract

In this paper, we present a direct, effective and atom-economical access toward quinoline-fused cyclobutane derivatives through Rh(iii)-catalyzed cascade reactions ofN-arylsydnones with allenyl acetates.