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Synthesis of Ru(II) complexes with bioisosteric 2-(2-pyridyl)benzazole ligands. Reagents, conditions and yields: (a) Ru(dmphen)2Cl2 (1.0 eq), ethylene glycol, 100–120 °C for 2 h (5–8), 20–30%; (b) Ru(bpy)2Cl2 (1.0 eq), ethanol-water (1:1), 90 °C for 2 h (9–12), 45–95%.
