Synthesis of energy transfer cassettes via click and Suzuki–Miyaura cross coupling reactions

Abstract

Novel cassettes capable of energy transfer involving simple synthetic methods viz., copper catalyzed azide–alkyne cycloaddition (click reaction) at the C-8 position and palladium catalyzed Suzuki–Miyaura cross coupling at the C-6 position have been represented. The resulting imidazo[1,2-a]pyrazine-triazole bridged coumarin cassettes are capable of energy transfer from a donor core to an acceptor moiety.