IN RECENT YEARS, PALLADIUM CATALYZED C-C BOUND FORMATION HAS BEEN EVOLVED INTO A GENERAL TECHNIQUE FOR Coupling DIFFERENT SUBSTRATES UNDER VARIOUS CONDITIONS. ON THE OTHER HAND, CYCLOPALLADATED COMPLEXES AS AN IMPORTANT MATERIAL IN INORGANIC CHEMISTRY PLAY IMPORTANT ROLE IN DIVERSE FIELDS OF STUDY ESPECIALLY IN Coupling REACTIONS [1, 2]. HOMOGENEOUS PALLADIUM NANO CATALYST HAVE HIGHER REACTION RATE THAN HETEROGENEOUS BUT THERE ARE SOME PROBLEMS CONCERNING WITH THESE CATALYST SUCH AS NEED OF HIGH PRICE LIGANDS, SEPARATION FROM REACTION MIXTURE AND REUSE OF EXPENSIVE METAL CATALYST.IN THIS STUDY A PVP-SUPPORTED PALLADIUM NANO-CATALYST IS PREPARED AND CHARACTERIZED BY SCANNING ELECTRON MICROSCOPY (SEM), TRANSITION ELECTRON MICROSCOPY (TEM) AND X-RAY DIFFRACTION (XRD) TECHNIQUES. PALLADIUM NANOPARTICLES SUPPORTED ON PVP WAS USED AS AN EFFICIENT CATALYST IN THE SUZUKI Cross-Coupling REACTIONS OF PHENYL BRONIC ACID WITH ARYL HALIDES (SCHEME 1). OPTIMUM CONDITION FOR SUZUKI REACTION WAS EVALUATED BY VARIOUS TEMPERATURES, DURATION OF REACTION, AND KIND OF BASE, SOLVENT AND AMOUNT OF CATALYST. ALL REACTIONS WERE MONITORED BY GC AND GENERALLY GAVE HIGH YIELD OF COUPLED PRODUCTS.

BACKGROUND: THE SONOGASHIRA REACTION IS A Cross-Coupling REACTION USED IN ORGANIC SYNTHESIS TO FORM CARBON-CARBON BONDS. IT EMPLOYS A PALLADIUM CATALYST TO FORM A CARBON-CARBON BOND BETWEEN A TERMINAL ALKYNE AND AN ARYL OR VINYL HALIDE. …

HECK REACTION IS ONE OF THE MOST VERSATILE AND USEFUL TOOLS IN ORGANIC SYNTHESIS [1]. PALLADIUM (PD) IS ONE OF THE MOST USEFUL TRANSITION METAL CATALYSTS FOR THE SYNTHESIS OF ORGANIC COMPOUNDS, ESPECIALLY CARBON–CARBON Cross-Coupling REACTIONS. HOWEVER, ITS USE IS LIMITED IN HOMOGENEOUS REACTION SYSTEMS DUE TO DIFFICULTIES IN SEPARATING THE PALLADIUM CATALYST AND LIGAND FROM THE FINAL PRODUCT AND RECYCLING THE CATALYST. ACCORDINGLY, MANY VARIETIES OF SOLID-SUPPORTED PALLADIUM CATALYSTS SUCH AS SILICA, CHITOSAN, CELLULOSE AND SO HAVE BEEN DEVELOPED BY IMMOBILIZING [2, 3]. IN RECENT YEARS, EFFORTS HAVE BEEN DEVOTED TO USE SEVERAL BIOPOLYMERS, AS SUPPORTS FOR CATALYTIC APPLICATIONS [4]. IN THIS STUDY, WE HAVE SYNTHESIZED A SIMPLE HETEROGENEOUS PALLADIUM COMPLEX WHICH IS SUCCESSFULLY EMPLOYED AS AN EXCELLENT CATALYST FOR HECK Cross-Coupling REACTIONS. A VARIETY OF SUBSTRATES, BOTH ELECTRON-RICH AND ELECTRON-POOR OLEFINS, WERE CONVERTED SMOOTHLY TO THE TARGETED PRODUCTS IN HIGH YIELDS.