Résumé
The n ‐butyllithium and lithium 2,2,6,6‐tetramethylpiperidide metalation and the halogen‐metal exchange of imidazo[1,2‐ a ]quinoxaline derivatives followed by quenching with various electrophiles were studied. The reaction conditions have been optimized and various C 1 substituted imidazo[1,2‐ a ]quinoxalines were obtained in high yields.