Homogeneous and heterogeneous catalysts for multicomponent reactions

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

doi:10.1039/c1ra00807b

Cited by 323 publications

(157 citation statements)

References 387 publications

(391 reference statements)

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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%

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

Climent

Corma

Hernández

et al. 2012

Journal of Catalysis

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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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Section: Introductionmentioning

confidence: 99%

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

Climent

Corma

Hernández

et al. 2012

Journal of Catalysis

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“…Nanocatalysts are considered to be a bridge between homogeneous and heterogeneous catalysis [19][20][21][22][23]. Nanoparticles exhibit good catalytic activity due to their large surface area and active sites which are mainly responsible for their catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

SnO nanoparticles: a robust and reusable heterogeneous catalyst for the synthesis of 3,4,5-substituted furan-2(5H)-ones

Safaei‐Ghomi

Heidari-Baghbahadorani

Shahbazi‐Alavi

2014

Monatsh Chem

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SnO nanoparticles as an efficient and recyclable catalyst have been successfully prepared and were used as a heterogeneous catalyst for the one-pot synthesis of 3,4,5-substituted furan-2(5H)-ones by the three-component reaction of aniline derivatives, dialkyl acetylene dicarboxylate, and aromatic aldehydes in ethanolic medium at room temperature. This work consistently has the advantages of excellent yields, short reaction time, simple workup, and recyclability of the catalyst up to six runs without appreciable loss of activity.

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“…6 In the context of green chemistry, the design and development of organic synthesis performed through multicomponent reactions (MCRs) have become a significant area of research in organic chemistry since such processes improve atom economy, efficiency and convergence. 7 Therefore, MCRs are often useful alternatives to sequential multistep synthesis. The synergistic use of nanomagnetic particles and MCRs allows efficient synthesis of diverse nitrogen-containing heterocycles.…”

Section: Introductionmentioning

confidence: 99%

A solvent-free synthesis of polyhydroquinolines via Hantzsch multicomponent condensation catalyzed by nanomagnetic-supported sulfonic acid

Otokesh¹,

Koukabi²,

Kolvari³

et al. 2015

S.Afr.j.chem

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A simple and efficient procedure for the synthesis of polyhydroquinolines was developed, involving a one-pot four-component Hantzsch condensation of aromatic aldehydes, 1,3-cyclohexanediones, alkyl acetoacetate and ammonium acetate in the presence of a catalytic amount of nanomagnetic-supported sulfonic acid under solvent-free conditions. The method offers several advantages including high yields, short reaction times, a simple work-up procedure and catalyst reusability for several runs. Furthermore, easy isolation of the catalyst from the reaction mixture was enabled by use of an external magnet.

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Homogeneous and heterogeneous catalysts for multicomponent reactions

Cited by 323 publications

References 387 publications

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

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

SnO nanoparticles: a robust and reusable heterogeneous catalyst for the synthesis of 3,4,5-substituted furan-2(5H)-ones

A solvent-free synthesis of polyhydroquinolines via Hantzsch multicomponent condensation catalyzed by nanomagnetic-supported sulfonic acid

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