Silica-supported palladium: Sustainable catalysts for cross-coupling reactions

Polshettiwar, Vivek; Len, Christophe; Fihri, Aziz

doi:10.1016/j.ccr.2009.06.001

Cited by 499 publications

(231 citation statements)

References 140 publications

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“…These catalysts are indeed very favorable from a sustainable point of view [15]. In the past decade, many efforts have been dedicated for the immobilization of metal complexes on various supports to combine the privileges of both homogeneous and heterogeneous catalysts [16,17]. Furthermore, industrial heterogeneous catalysts composed of supported metal particles or NPs were also prepared for practical applications.…”

Section: Open Accessmentioning

confidence: 99%

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Shokouhimehr

2015

Catalysts

185

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This review is focused on the strategies and designs of magnetic nanostructured catalysts showing the enhanced and sustainable catalytic performances for the heterogeneous reduction of nitoaromatics. Magnetic catalysts have the benefits of easy recovery and reuse after the completion of the reactions and green chemical processes. Magnetic separation, among the various procedures for removing catalysts, not only obviates the requirement of catalyst filtration or centrifugation after the completion of reactions, but also provides a practical technique for recycling the magnetized nanostructured catalysts. Consequently, discussions will address the methodologies and exemplars for the reusable magnetic composite catalysts. Because the synthesis of ideal magnetic nanostructured catalysts is of primary importance in the development of high-quality sustainable processes, the designs, preparation methods and recyclability of various recoverable magnetic nanostructured catalysts are emphasized. The representative methods and strategies for the synthesis of durable and reusable magnetic nanostructured catalysts are highlighted. The advantages, disadvantages, recyclability and the efficiency of the introduced heterogeneous systems have been explored in the reduction of nitrobenzene derivatives.

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Section: Open Accessmentioning

confidence: 99%

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Shokouhimehr

2015

Catalysts

185

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“…Desse modo, a sílica gel se sobressai como um sólido poroso dotado de propriedades químicas e físicas específicas, podendo ser usada como matéria prima para fabricação de zeólitas [21], MCM [22], refratários [23], materiais de construção civil [24], pozolânicos [25], argamassa [26], entre outros. Quando sua superfície é quimicamente modificada por um agente organofuncionalizante [27], a sílica pode ser usada como suporte para catalisadores [28], fase estacionária em cromatografia líquida de alta eficiência (CLAE) [29] e para liberação controlada de fármacos [30], em tecnologias fotodinâmicas nas terapias do câncer [31] ou ainda como agente sequestrante de metais [32]. Visto que a EAF contém quantidades expressivas de sílica em sua composição, o presente trabalho realiza a caracterização da sílica proveniente da EAF, com o objetivo de determinar sua qualidade e propor possíveis destinos a esse material, avaliando parâmetros como tamanho de partícula, pureza química e área específica.…”

Section: Introductionunclassified

Sílica gel obtida de escória de alto forno: Marabá, Pará

2015

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ResumoSílica gel com propriedades similares à sílica comercial foi obtida a partir de escória de alto forno (EAF), utilizando digestão com ácido clorídrico. A EAF-sílica obtida foi caracterizada por diferentes técnicas, mostrando-se amorfa, com pureza 99,7% e área específica 282 m 2 /g. Apresentou caráter hidrofílico alto (12,27%), com água de constituição de ~ 6,18%, o que foi confirmado pela perda de massa durante a análise termogravimétrica. As partículas de EAF-sílica apresentaram tamanhos micrométricos (< 1 µm) em forma de agregados, distribuição granulométrica unimodal e D 50 7,0 µm. Palavras-chave: escória de alto forno, sílica gel, síntese. Abstract Silica gel with similar properties to commercial silica was obtained from blast furnace slag (EAF) using digestion with

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“…Palladium, the most widely used metal, enables the synthesis of complex and functionalized organic molecules and its chemistry possesses different interesting facets such as heterogeneous and homogeneous catalysis under mild experimental conditions compatible with many functional groups [1][2][3][4][5]. Several palladium catalyzed cross-coupling reactions such as Heck [6][7][8][9][10][11], Suzuki [12][13][14][15][16], Sonogashira [17][18][19][20][21], Stille [22][23][24][25], Hiyama [26], Negishi [27], Kumada [28], Murahashi [29] and Buchwald-Hartwig [30,31] have been developed over the years.…”

Section: Introductionmentioning

confidence: 99%

Palladium-Catalyzed Suzuki–Miyaura Cross-Coupling in Continuous Flow

et al. 2017

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Carbon-carbon cross-coupling reactions are among the most important processes in organic chemistry and Suzuki-Miyaura reactions are the most widely used protocols. For a decade, green chemistry and particularly catalysis and continuous flow, have shown immense potential in achieving the goals of "greener synthesis". To date, it seems difficult to conceive the chemistry of the 21st century without the industrialization of continuous flow process in the area of pharmaceuticals, drugs, agrochemicals, polymers, etc. A large variety of palladium Suzuki-Miyaura cross-coupling reactions have been developed using a continuous flow sequence for preparing the desired biaryl derivatives. Our objective is to focus this review on the continuous flow Suzuki-Miyaura cross-coupling using homogeneous and heterogeneous catalysts.

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Silica-supported palladium: Sustainable catalysts for cross-coupling reactions

Cited by 499 publications

References 140 publications

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Sílica gel obtida de escória de alto forno: Marabá, Pará

Palladium-Catalyzed Suzuki–Miyaura Cross-Coupling in Continuous Flow

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