GRAPHICAL ABSTRACT
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Abstract
Cyclophosphazene was reacted with biphenyl-2,2’- diol to afford the N3P3Cl4(O2C12H8) (1). Then, pyridyloxy cyclophosphazene, spiro N3P3(O2C12H8)(O‒C5H4N-3)4 (2) was synthesized from the reaction of 3-hydroxy pyridine and compound 1. The reaction of 2 with [RuCl2(p-cymene)]2 afforded Ru(II) complex (3). The structures of the ligand and complex are characterized by elemental analysis, FT-IR, 1H-, and 31P-NMR spectroscopy. Ru(II) complex has been employed as catalysts for the transfer hydrogenation of acetophenone in the presence of KOH using 2-propanol as a hydrogen source. The complex has demonstrated good catalytic activity in transfer hydrogenation of ketones.