activities. Imidazo[4,5-b]pyridine core can be considered as an
isosteric replacement of the biologically relevant purine heterocycle
and hence is an important pharmacophore in the field of
medicinal chemistry and drug design [7]. The naturally occurring
purines adenine and guanine have vital roles in numerous life
processes [8,9]. This central biological importance and the need
for the search of new biologically relevant molecules have
resulted in a rapid expansion of purine chemistry in recent years
[8,9]. This has led to a considerable degree of interest in the
bioisosteric modification [10,11,12] of purine scaffold to create
novel chemical agents to understand and treat a variety of
medical conditions