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Abstract A transition metal‐free iodosobenzene‐promoted direct oxidative 3‐arylation of quinoxalin‐2( H )‐ones was developed using various arylhydrazines under air. The protocol affords a variety of 3‐arylquinoxalin‐2( H )‐one derivatives in moderate to good yields. This method provides a rapid access to biologically interesting benzo g quinoxalinones and pyrido3,4‐ b pyrazinones. The present methodology features high functional group tolerance including base‐sensitive groups as well as allyl‐ and benzyl‐substituted quinoxalin‐2( H )‐ones under mild reaction conditions. magnified image
Paul et al. (Thu,) studied this question.