Azido- and Ethynyl-Substituted 2,2′:6′,2′′-Terpyridines as Suitable Substrates for Click Reactions - Winter, Andreas; Wild, Andreas; Hoogenboom, Richard; Fijten, Martin W. M.; Hager, Martin D.; Fallahpour, Reza-Ali; Schubert, Ulrich S. (Synthesis, 2009)