Mechanochemical Synthesis of 2‐Arylquinoxalines and 3‐Arylquinoxalin‐2(1H)‐ones via Aryldiazonium Salts

Abstract A green synthesis strategy of 2‐arylquinoxalines and 3‐arylquinoxalin‐2(1 H )‐ones via ball milling, which could avoid copious solvent waste, was accomplished in this work. Aryl radicals were produced from aryldiazonium salts by using a solvent‐free or catalyst‐free single electron transfer process induced by mechanical force, affording a series of 2‐arylquinoxalines and 3‐arylquinoxalin‐2(1 H )‐ones with 28%–85 yield. magnified image