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Keywords:

  • annulation;
  • cinnolines;
  • copper catalysis;
  • heterocycles;
  • tandem processes
Thumbnail image of graphical abstract

Cinn-tillating synthesis: The combination of a readily available copper catalyst, a simple hydrazide nucleophile, and established difunctionalized building blocks provides a new, flexible route to an under-developed class of aromatic heterocycles, cinnolines (see scheme).