Heterogeneous Catalysts for the One-Pot Synthesis of Chemicals and Fine Chemicals

Climent, María J.; Corma, Avelino; Iborra, Sara

doi:10.1021/cr1002084

Cited by 756 publications

(425 citation statements)

References 479 publications

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“…Zeolite‐based catalyst bodies are employed on a global scale in important chemical processes, such as the synthesis of many bulk chemicals1, 2 as well as crude‐oil refining 3. 4 Particular examples include xylene isomerisation,5, 6 benzene alkylation7, 8 and methanol conversion to hydrocarbons 9.…”

Section: Introductionmentioning

confidence: 99%

Binder Effects in SiO₂‐ and Al₂O₃‐Bound Zeolite ZSM‐5‐Based Extrudates as Studied by Microspectroscopy

et al. 2015

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Microspectroscopic methods were explored to investigate binder effects occurring in ZSM‐5‐containing SiO2‐ and Al2O3‐bound millimetre‐sized extrudates. Using thiophene as a selective probe for Brønsted acidity, coupled with time‐resolved in situ UV/Vis and confocal fluorescence microspectroscopy, variations in reactivity and selectivity between the two distinct binder types were established. It was found that aluminium migration occurs in ZSM‐5‐containing Al2O3‐bound extrudates, forming additional Brønsted acid sites. These sites strongly influence the oligomer selectivity, favouring the formation of thiol‐like species (i.e., ring‐opened species) in contrast to higher oligomers, predominantly formed on SiO2‐bound ZSM‐5‐containing extrudates. Not only were the location and distribution of these oligomers visualised by 3 D analysis, it was also observed that more conjugated species appeared to grow off the surface of the zeolite ZSM‐5 crystals (containing less conjugated species) into the surrounding binder material. Furthermore, a higher binder content resulted in an increasing overall reactivity owing to the greater number of stored thiophene monomers available per Brønsted acid site.

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Section: Introductionmentioning

confidence: 99%

Binder Effects in SiO₂‐ and Al₂O₃‐Bound Zeolite ZSM‐5‐Based Extrudates as Studied by Microspectroscopy

et al. 2015

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“…[8][9][10] In addition, the design and development of environment-friendly catalysts have been the subject of intense research. 11 The hydrotalcite like compounds (HT), also known as layered double hydroxides (LDH), are anionic clay materials that have been extensively investigated as heterogeneous base catalysts. [12][13][14][15] The HT-like compounds exhibit dual basic/acid properties 16,17 and can be useful as bifunctional catalysts in different organic transformations.…”

Section: Introductionmentioning

confidence: 99%

New Multicomponent Reaction for the Direct Synthesis of β-Aryl-γ-nitroesters Promoted by Hydrotalcite-Derived Mixed Oxides as Heterogeneous Catalyst

D'Oca

Naciuk

Silva

et al. 2016

Journal of the Brazilian Chemical Society

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A new approach based on multicomponent/domino combined reactions for the synthesis of γ-nitroesters promoted by a mixed aluminium-magnesium oxides derived from hydrotalcite-like material was developed. Different γ-nitroesters were synthesized in 15-95% yield using Meldrum's acid, aromatic aldehydes, nitromethane and different alcohols as reagents and solvents. The γ-aminobutyric acid derivatives, Phenibut and Baclofen, were prepared in 63 and 61% overall yield, respectively, through a two steps synthetic strategy. A mechanistic pathway was proposed based on the gas chromatography mass spectrometry (GC-MS) and electrospray ionization mass spectrometry (ESI-MS) experiments.

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“…In recent years, heterogeneous catalysts have gained more importance due to environmental and economic factors, and uni or multisite solid catalysts have been successfully used for process intensification and waste minimization in several organic transformations [42][43][44][45]. Thus, the synthesis of 2-methylquinoxaline with solid catalysts was performed by Gopal et al [46] with transition metals (Pb, Cu, Mn and Cr) and La supported on HY zeolite at 350 ºC, and 82% yield of 2-methylquinoxaline was achieved with a Pb/HY catalyst.…”

Section: Introductionmentioning

confidence: 99%

A Chalcone‐Based Highly Selective and Sensitive Chromofluorogenic Probe for Trivalent Metal Cations

et al. 2015

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ElsevierCliment Olmedo, MJ.; Corma Canós, A.; Hernández, JC.; Hungría, AB.; Iborra Chornet, S.; Martínez Silvestre, S. (2012). Biomass into chemicals: One-pot two-and three-step synthesis of quinoxalines from biomass-derived glycols and 1,2-dinitrobenzene derivatives using supported gold nanoparticles as catalysts. AbstractAn efficient and selective one-pot two steps, method for the synthesis of quinoxalines by oxidative coupling of vicinal diols with 1,2-phenylenediamine derivatives, has been developed by using gold nanoparticles supported on nanoparticulated ceria (Au/CeO 2 ) or hydrotalcite (Au/HT) as catalysts and air as oxidant, in absence of any homogeneous base. Reaction kinetics shows that the reaction controlling step is the oxidation of the diol to α-hydroxycarbonyl compound.Furthermore, a one-pot three steps synthesis of 2-methylquinoxaline starting from 1,2-dinitrobenzene and 1,2-propanediol has been successfully carried out with 98% conversion and 83% global yield to the final product.

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Heterogeneous Catalysts for the One-Pot Synthesis of Chemicals and Fine Chemicals

Cited by 756 publications

References 479 publications

Binder Effects in SiO₂‐ and Al₂O₃‐Bound Zeolite ZSM‐5‐Based Extrudates as Studied by Microspectroscopy

Binder Effects in SiO₂‐ and Al₂O₃‐Bound Zeolite ZSM‐5‐Based Extrudates as Studied by Microspectroscopy

New Multicomponent Reaction for the Direct Synthesis of β-Aryl-γ-nitroesters Promoted by Hydrotalcite-Derived Mixed Oxides as Heterogeneous Catalyst

A Chalcone‐Based Highly Selective and Sensitive Chromofluorogenic Probe for Trivalent Metal Cations

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Heterogeneous Catalysts for the One-Pot Synthesis of Chemicals and Fine Chemicals

Cited by 756 publications

References 479 publications

Binder Effects in SiO2‐ and Al2O3‐Bound Zeolite ZSM‐5‐Based Extrudates as Studied by Microspectroscopy

Binder Effects in SiO2‐ and Al2O3‐Bound Zeolite ZSM‐5‐Based Extrudates as Studied by Microspectroscopy

New Multicomponent Reaction for the Direct Synthesis of β-Aryl-γ-nitroesters Promoted by Hydrotalcite-Derived Mixed Oxides as Heterogeneous Catalyst

A Chalcone‐Based Highly Selective and Sensitive Chromofluorogenic Probe for Trivalent Metal Cations

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Binder Effects in SiO₂‐ and Al₂O₃‐Bound Zeolite ZSM‐5‐Based Extrudates as Studied by Microspectroscopy

Binder Effects in SiO₂‐ and Al₂O₃‐Bound Zeolite ZSM‐5‐Based Extrudates as Studied by Microspectroscopy