Chemistry of Functionalized Quinoxaline N‐Oxides. Part 1. Efficient Synthesis of Quinoxaline Derivatives by Selective Modification of 3‐Chloro‐6‐fluoroquinoxalin‐2(1H)‐one 4‐Oxide.

Polyfunctionalized quinoxaline N-oxides are derived from building block (III), which is obtained on a multigram scale by a one-step annulation reaction of fluoroaniline (I) with trichloronitroethene (II).