Preparation of a series of novel fluorophores, N-substituted 6-amino and 6,6″-diamino-2,2′:6′,2″-terpyridine by palladium-catalyzed amination

A new series of highly fluorescent tpy derivatives, N-substituted 6-amino- and 6,6″-diamino-2,2′:6′,2″-terpyridine was conveniently prepared in one-step by Pd-catalyzed amination of bromo-substituted tpys with various amines.