The synthesis and fluorescence properties of novel purine analogues linked azacrownether at C6 position were investigated. These new purine analogues could be prepared from a series of 6-chloropurines and showed selective and efficient signaling behaviors toward micromolar concentration of Ag+ ion over other common metal ions in an aqueous environment.
Novel6-[N,N-bis(2-hydroxyethyl)amino]purine nucleosides were prepared in one step by nucleophilic substitution reaction of 6-choloropurine nucleosides with diethanolamine. Shorter reaction times and higher yields were achieved under microwave irradiation conditions in neat water.