مقاله Silica-supported palladium complex: An efficient, highly selective and reusable organic–inorganic hybrid catalyst for the synthesis of E-stilbenes : تی پی بین

خلاصه مقاله

A novel, highly efficient and reusable palladium based catalyst has been synthesized by covalent grafting of diphenyldiketone–monothiosemicarbazone on silica gel followed by metallation with palladium chloride, and the resulting organic–inorganic hybrid material was found to be highly effective catalyst for Suzuki-Miyaura cross-coupling reaction of various aryl halides with alkenyl boronic acid to give stilbenes. The catalyst was characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, energy dispersive X-ray fluorescence (ED-XRF), BET surface area analysis, solid-state ¹³C CPMAS NMR spectroscopy, atomic absorption spectroscopy (AAS), scanning electron microscopy (SEM) and elemental analysis. High turnover frequency, mild reaction conditions, high selectivity for E-stilbenes, and easy recovery and reusability of the catalyst renders the present protocol highly indispensable to address the industrial prerequisites and environmental concerns.

نویسندگان

R.K. Sharma [ Green Chemistry Network Centre, Department of Chemistry, University of Delhi, Delhi 110007, India ]

Amit Pandey [ Green Chemistry Network Centre, Department of Chemistry, University of Delhi, Delhi 110007, India ]

Shikha Gulati [ Green Chemistry Network Centre, Department of Chemistry, University of Delhi, Delhi 110007, India ]

کلمات کلیدی

Cross coupling reaction Reusable catalyst Silica gel Immobilization Microwave Stilbenes

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مشاهده مقالات

2012 Applied Catalysis A: General

The scope of Applied Catalysis A: General includes the following:Scientific understanding of any catalytic phenomenon .Phenomena of relevance to current industrial processes, processes under industrial development or of interest for future commercial applications are particularly welcome. Heterogeneous, homogeneous and biocatalysts are included .Research investigating catalytic actions of heterogeneous, homogeneous, biological and natural systems are especially encouraged. Scientific aspects of preparation, activation, aging, deactivation, rejuvenation, regeneration and start up transient effects of commercially interesting or representative model catalysts. Scientific methods of characterization of catalysts, especially if they are applicable to industrial catalysts .Chemical engineering aspects relevant to an improved understanding of catalytic phenomena or application to catalysis. Results involving a joint approach by chemical engineering and catalytic science are particularly welcome. New catalysts, catalytic reactions, catalytic routes and processes of potential practical interest. Catalysis and catalytic processes for sustainable practices, including sustainable energy supply and consumption processes, and sustainable chemicals production.

حوزه های تحت پوشش : Petrochemical industry , Catalytic Science , chemical scientists in both industrial and academic fields