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Base Metal Catalysis and Green Synthesis

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Organometallic Chemistry".

Deadline for manuscript submissions: closed (1 June 2018) | Viewed by 22370

Special Issue Editor

Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
Interests: carbonylation; heterocycle synthesis; oxidation; green transformations
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nowadays, sustainable development has been accepted as common knowledge by society. Under this background, the applications of cheap metal salts for use as catalysts in organic synthesis are becoming more and more important and attractive due to their advantages, such as they have low costs, are less-toxic, are biocompatible, environmental benign, etc. Taking all these parameters into consideration, this Special Issue will focus on the applications of base metals as catalysts in organic synthesis. All contributions on this topic are encouraged.

Prof. Dr. Xiao-Feng Wu
Guest Editor

Manuscript Submission Information

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Keywords

  • base metal
  • organic synthesis
  • green chemistry
  • synthetic methodology

Published Papers (4 papers)

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Research

12 pages, 4241 KiB  
Article
Ultra-Fast Degradation of p-Aminophenol by a Nanostructured Iron Catalyst
by Rocio Benavente, David Lopez-Tejedor, Carlos Perez-Rizquez and Jose M. Palomo
Molecules 2018, 23(9), 2166; https://doi.org/10.3390/molecules23092166 - 28 Aug 2018
Cited by 10 | Viewed by 3479
Abstract
Full degradation of p-aminophenol in aqueous solution at room temperature by using a heterogeneous nanostructured iron hybrid catalyst in the presence of hydrogen peroxide is described. A nanostructured iron catalyst was prepared by in situ formation of iron carbonate nanorods on the [...] Read more.
Full degradation of p-aminophenol in aqueous solution at room temperature by using a heterogeneous nanostructured iron hybrid catalyst in the presence of hydrogen peroxide is described. A nanostructured iron catalyst was prepared by in situ formation of iron carbonate nanorods on the protein network using an aqueous solution of an enzyme, lipase B from Candida antarctica (CAL-B). A second kind of iron nanostructured catalyst was obtained by the sunsequent treatment of the hybrid with an aqueous liquid extract of Mentha x piperita. Remarkable differences were observed using TEM imaging. When M. piperita extract was used, nanoparticles appeared instead of nanorods. Catalytic activity of these iron nanocatalysts was studied in the degradation of the environmental pollutant p-aminophenol (pAP) under different operating parameters, such as pH, presence of buffer or hydrogen peroxide concentration. Optimal conditions were pH 4 in acetate buffer 10 mM containing 1% (v/v) H2O2 for FeCO3NRs@CALB, while for FeCO3NRs@CALB-Mentha, water containing 1% (v/v) H2O2, resulted the best. A complete degradation of 100 ppm of pAP was achieved in 2 and 3 min respectively using 1 g Fe/L. This novel nanocatalyst was recycled five times maintaining full catalytic performance. Full article
(This article belongs to the Special Issue Base Metal Catalysis and Green Synthesis)
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11 pages, 6241 KiB  
Article
Supported Ni Catalyst for Liquid Phase Hydrogenation of Adiponitrile to 6-Aminocapronitrile and Hexamethyenediamine
by Chengqiang Wang, Zekun Jia, Bin Zhen and Minghan Han
Molecules 2018, 23(1), 92; https://doi.org/10.3390/molecules23010092 - 04 Jan 2018
Cited by 12 | Viewed by 6094
Abstract
Supported Ni catalysts prepared under different conditions, for liquid phase hydrogenation of adiponitrile (ADN) to 6-aminocapronitrile (ACN) and hexamethyenediamine (HMD), were investigated. The highly reactive imine intermediate can form condensation byproducts with primary amine products (ACN and HMD), which decreased the yield coefficient [...] Read more.
Supported Ni catalysts prepared under different conditions, for liquid phase hydrogenation of adiponitrile (ADN) to 6-aminocapronitrile (ACN) and hexamethyenediamine (HMD), were investigated. The highly reactive imine intermediate can form condensation byproducts with primary amine products (ACN and HMD), which decreased the yield coefficient of primary amines. The catalysts support, condition of catalyst preparation and dosage of additive were studied to improve the yield. A highly dispersed Ni/SiO2 catalyst prepared by the direct reduction of Ni(NO3)2/SiO2 suppressed the condensation reactions by promoting the hydrogenation of adsorbed imines, and it gave the improved hydrogenation activity of 0.63 mol·kgcat−1·min−1 and primary amine selectivity of 94% when NaOH was added into the reactor. Full article
(This article belongs to the Special Issue Base Metal Catalysis and Green Synthesis)
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1925 KiB  
Article
Multi-Component One-Pot Reaction of Aromatic Carbonyl Compounds, Tosylhydrazide, and Arylboronic Acids
by Ningning Gu, Yu Wei, Ping Liu, Yan Liu and Bin Dai
Molecules 2017, 22(12), 2168; https://doi.org/10.3390/molecules22122168 - 07 Dec 2017
Cited by 7 | Viewed by 6054
Abstract
In this paper, we developed a new method using 4-bromoacetophenone as the starting material, with tosylhydrazide and two arylboronic acids using Barluenga and Suzuki couplings in a four-component one-pot reaction to afford the target product 4-benzyl-1,1′-biphenyls. This system that we have developed enables [...] Read more.
In this paper, we developed a new method using 4-bromoacetophenone as the starting material, with tosylhydrazide and two arylboronic acids using Barluenga and Suzuki couplings in a four-component one-pot reaction to afford the target product 4-benzyl-1,1′-biphenyls. This system that we have developed enables the use of easily accessible starting materials and can be employed on a wide variety of substrates with good functional group tolerance. In particular, this protocol can be applied to the synthesis of 4-(1-([1,1′-biphenyl]-4-yl)ethyl)pyridine derivatives, a class of potential analogs of CPY17 inhibitors of prostate cancer. Full article
(This article belongs to the Special Issue Base Metal Catalysis and Green Synthesis)
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8613 KiB  
Article
Synthesis of 2H-Chromenones from Salicylaldehydes and Arylacetonitriles
by Chengcai Li, Hailin Zhu, Hang Zhang, Yongfeng Yang and Feng Wang
Molecules 2017, 22(7), 1197; https://doi.org/10.3390/molecules22071197 - 18 Jul 2017
Cited by 7 | Viewed by 6355
Abstract
An efficient and convenient protocol for the synthesis of 2H-chromenones has been developed. In the presence of tBuOK in DMF, good to excellent yields of various chromenones were obtained from the corresponding salicylaldehydes and arylacetonitriles. No protection of inert gas [...] Read more.
An efficient and convenient protocol for the synthesis of 2H-chromenones has been developed. In the presence of tBuOK in DMF, good to excellent yields of various chromenones were obtained from the corresponding salicylaldehydes and arylacetonitriles. No protection of inert gas atmosphere is required here. Full article
(This article belongs to the Special Issue Base Metal Catalysis and Green Synthesis)
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