Synthesis and characterization of palladium(II) complexe derived from α-keto stabilized pyridine ylide and study on its catalytic properties

New prepared ylide has been considered in this research for the preparation of palladium complexes whit catalytic applications[1]. A palladium complex combined with this kind of ylides is the most commonly used catalytic system for these type of reactions [2]. According to this report, this ylide was synthesized in a 1:1 ratio with potassium carbonate as a base in ice bath which was used to synthesize the palladium complexes (II). By doing this reactions, it is possible to develop research on the use of materials for the synthesis of palladium metal catalysts that can greatly increses the yieds of products. Characterization of the complex by IR, 1H and 13C NMR spectroscopy confirmed coordination of the ylide to the metal through the carbon atom (Fig. 1). Also In this work, the Suzuki–Miyaura reaction of various aryl halides using [Pd(μ-Cl2){C6H5NC(H)C(O)PhR}]2 (R=p-Ph) have been investigated. Well-defined pyridine bis-ylide Pd(II) complex were found to be an effective catalyst for the Suzuki coupling of various aryl halides including with phenyl boronic acid, giving the desired coupling products at low catalyst loading in moderate to good yields.