Amajor aim of the work presented in this paper is to investigate
alternative heterocycle to the purine analogue as novel cytotoxic
agents [7]. It was hoped that by doing so, the physiochemical
properties such as LogP, and topological polar surface area (tPSA)
could be modified without significantly altering the overall shape of
the ligand. This may allow the discovery of some novel analogues
based on imidazo[4,5-b]pyridine core with improved pharmacokinetics,
and hence more favourable drug-like properties than the
parent purine scaffold [8,9].