The imidazo [1, 2-a] pyridine ring is a versatile system which has shown an outstanding array of biological activities [1]. The incorporation of the imidazo [1, 2-a] pyridine moiety in structures investigated in relation to potential pharmacological activities has continued [2]. Electrophiles predominantly attack on the position 3 of the heterocycle [3]. Furthermore ipso electrophilic attack on 3-substituted (Br, NO2, CHO)-5-methylimidazo [1, 2-a] pyridines by ...