Direct C‐2 arylation of quinoxaline with arylhydrazine salts as arylation reagents

A transition metal‐free synthesis of 2‐arylquinoxaline is achieved by using arylhydrazine salt as an aryl radical arylation reagent and air as an oxidant in the presence of K2CO3. This protocol features metal‐free, no additives, mild reaction conditions, environment friendly, and can be used to construct biologically active molecules containing 2‐phenylquinoxaline structure.