Unsymmetrical relay C–H alkenylation and [2 + 2] cycloaddition of<i>N</i>-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 of N -arylsydnones with allenyl acetates.