A Convenient One-Pot Synthesis of 4′-Aryl-2,2′:6′,2′′-terpyridines and 2,4,6-Triarylpyridines under Microwave Irradiation

Abstract

A series of 4¢-aryl-2,2¢:6¢,2¢¢-terpyridines have been prepared by the one-pot reaction of 2-acetylpyridine with aromatic aldehydes in the presence of ammonium acetate under microwave irradiation. This method has the advantages of shorter route, easier workup, shorter reaction time, higher yield and more environmentally friendly conditions, compared to the conventional ones.

Photophysical and Photobiological Properties of Dinuclear Iridium(III) Bis-tridentate Complexes

“…The bridging ligands ( L1 and L2) were synthesized following our previously reported procedures. 48 4′-Phenyl-2,2′:6′,2″-terpyridine (N ∧ N ∧ N), 49 1,3-dipyridyl-4,6-dimethylbenzene (N ∧ C ∧ N), 50 4,6-diphenyl-2,2′-bipyridine (C ∧ N ∧ N), 51 2,4,6-triphenylpyridine (C ∧ N ∧ C), 52 4′-phenyl-2,2′:6′,2″-terpyridine-IrCl 3 (N ∧ N ∧ N-IrCl 3 ), 53 and {[1,3-dipyridyl-4,6-dimethylbenzene]IrCl 2 } 2 (N ∧ C ∧ N Ir-dimer) 54 were synthesized according to established methods. Silica gel (60 Å, 230–400 mesh) and Al 2 O 3 (activated, neutral) were purchased from Sorbent Technology.…”

An efficient microwave‐assisted synthesis of 3,5‐unsubstituted 4‐substituted‐6‐aryl‐3,4‐dihydropyridin‐2(1H)‐ones derivatives

“…Therefore, we explored the reaction condition by changing the mass ratio of ammonium acetate and acetic acid. When the reaction was processed without acetic acid, the compound 6 [17] of 2,4,6-triarylpyridine derivative was obtained instead of compound 5 (Scheme III). So, the solvents play crucial role in this reaction.…”

3-Phenyl-1,5-di-2-pyridylpentane-1,5-dione

“…In more recent times there has been a lot of interest in these ligands as synthetic building blocks for supramolecular structures (Hofmeier & Schubert, 2004). Multistep syntheses (Krö hnke, 1976;Collin et al, 1996), as well as single-step approaches for these ligands, have been developed (Tu et al, 2005).…”