An efficient palladium catalyst on bentonite for Suzuki–Miyaura reaction at room temperature

Literature Information

Publication Date 2013-09-10
DOI 10.1039/C3GC41469H
Impact Factor 10.182
Authors

Guodong Ding, Weitao Wang, Tao Jiang, Buxing Han


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Abstract

Clays, which are nontoxic, abundant, and cheap, are very promising supports for the design and preparation of green catalysts. In this work, the Pd/bentonite catalyst was fabricated by a simple impregnation method using water as the medium. The catalyst was characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron spectroscopy (TEM), X-ray photoelectron (XPS) and inductively coupled plasma atomic emission spectroscopy (ICP-AES) techniques. The performance of Pd/bentonite in the Suzuki–Miyaura reaction was studied. It was found that for aryl bromides and iodides with various electron-donating and electron-withdrawing groups such as –CH3, –OCH3, –Cl, –CN, –F, –COCH3 and –NO2, the coupling reaction of substrates with arylboronic acid proceeded smoothly at low catalyst loading (Pd 0.06 mol%) under ambient temperature. The catalyst could be reused at least 7 times without any decrease in activity.

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Green Chemistry
CiteScore: 16.1
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Green Chemistry provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on, but not limited to, the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998). Green chemistry is the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry is at the frontiers of this continuously-evolving interdisciplinary science and publishes research that attempts to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. Submissions on all aspects of research relating to the endeavour are welcome. The journal publishes original and significant cutting-edge research that is likely to be of wide general appeal. To be published, work must present a significant advance in green chemistry. Papers must contain a comparison with existing methods and demonstrate advantages over those methods before publication can be considered. For more information please see this Editorial. Coverage includes the following, but is not limited to: Design (e.g. biomimicry, design for degradation/recycling/reduced toxicity…) Reagents & Feedstocks (e.g. renewables, CO2, solvents, auxiliary agents, waste utilization…) Synthesis (e.g. organic, inorganic, synthetic biology…) Catalysis (e.g. homogeneous, heterogeneous, enzyme, whole cell…) Process (e.g. process design, intensification, separations, recycling, efficiency…) Energy (e.g. renewable energy, fuels, photovoltaics, fuel cells, energy storage, energy carriers…) Applications (e.g. electronics, dyes, consumer products, coatings, pharmaceuticals, preservatives, building materials, chemicals for industry/agriculture/mining…) Impact (e.g. safety, metrics, LCA, sustainability, (eco)toxicology…) Green chemistry is, by definition, a continuously-evolving frontier. Therefore, the inclusion of a particular material or technology does not, of itself, guarantee that a paper is suitable for the journal. To be suitable, the novel advance should have the potential for reduced environmental impact relative to the state of the art. Green Chemistry does not normally deal with research associated with 'end-of-pipe' or remediation issues.

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