134-20-3Relevant articles and documents
Selective synthesis of Rh5 carbonyl clusters within a polyamine dendrimer for chemoselective reduction of nitro aromatics
Maeno, Zen,Mitsudome, Takato,Mizugaki, Tomoo,Jitsukawa, Koichiro,Kaneda, Kiyotomi
, p. 6526 - 6529 (2014)
The selective synthesis of the [Rh5(CO)15] - cluster within the PPI dendrimer was successfully demonstrated. The dendrimer-encapsulated [Rh5(CO)15]- was resistant to decomposition under the catalytic reaction conditions and exhibited extremely high selectivity for the chemoselective reduction of nitro groups of various nitro aromatics with other reducible groups using CO/H2O as a reductant. This journal is the Partner Organisations 2014.
In situ mosaic strategy generated Co-based N-doped mesoporous carbon for highly selective hydrogenation of nitroaromatics
Li, Huan,Yang, Hengquan,Zhang, Fengwei,Zhang, Xian-Ming,Zhao, Chao,Chen, Shuai
, p. 212 - 222 (2017)
The development of heterogeneous non-noble metal catalytic architectures that can realize the high selective and stable hydrogenation of nitroaromatics under mild conditions is a profound challenge in the catalysis community. Here we report a facile synthesis of highly nitrogen doped and uniformly embedded Co-based mesoporous carbon catalyst through a thermolysis and etching combined strategy, in which the commercial cobalt phthalocyanine and colloidal silica serve as precursor and hard template, respectively. The protocol allows for simultaneous optimization of porous features and cobalt nanoparticles of N-doped mesoporous carbon catalyst by fine-tuning thermolysis temperature. Among the as-prepared catalysts, Co@NMC-800 with lower dosage of cobalt exhibits outstanding catalytic activity and chemoselectivity for various nitroaromatics under mild condition (2.0?mol% Co, 1.0?MPa H2, 80?°C, xand Co NPs surface wrapped thin carbon layers plays a crucial role in providing the excellent selectivity for hydrogenation of vulnerable nitroaromatics via preferential adsorption of polar nitro group.
Nickel Boride Reduction of Aryl Nitro Compounds
Seltzman, Herbert H.,Berrang, Bertold D.
, p. 3083 - 3086 (1993)
Nickel boride smoothly reduces aryl nitro compounds to the corresponding anilines in the presence of iodo and ortho carboalkoxy groups in contrast to the problematic reductions by other methods.
Characterization of different commercial soybean peroxidase preparations and use of the enzyme for N-demethylation of methyl N-methylanthranilate to produce the food flavor methylanthranilate
Van Haandel, Marjon J. H.,Saraber, Florence C. E.,Boersma, Marelle G.,Laane, Colja,Fleming, Yvette,Weenen, Hugo,Rietjens, Ivonne M. C. M.
, p. 1949 - 1954 (2000)
The potential of different peroxidase preparations for the N- demethylation of methyl N-methylanthranilate to produce the food flavor methylanthranilate (MA) was investigated. All tested peroxidase preparations were able to catalyze the N-dealkylation. The tested soybean preparations vary widely with respect to their heme content. Furthermore, the operational stability of purified soybean peroxidase (SP) is at least 25-fold lower than that of horseradish peroxidase and only 5-fold higher than that of microperoxidase 8. Thus, the presence of a large protein chain around a porphyrin cofactor in a peroxidase is, by itself, insufficient to explain the observed differences in operational stability. Despite its relatively low operational stability, SP proved to be the most efficient biocatalyst for the production of MA with high yield and purity, especially observed at the high temperature and low pH values at which SP appeared to be optimally active.
Competitive homolytic and heterolytic decomposition pathways of gas-phase negative ions generated from aminobenzoate esters
Xia, Hanxue,Zhang, Yong,Pavlov, Julius,Jariwala, Freneil B.,Attygalle, Athula B.
, p. 245 - 253 (2016)
An alkyl-radical loss and an alkene loss are two competitive fragmentation pathways that deprotonated aminobenzoate esters undergo upon activation under mass spectrometric conditions. For the meta and para isomers, the alkyl-radical loss by a homolytic cleavage of the alkyl-oxygen bond of the ester moiety is the predominant fragmentation pathway, while the contribution from the alkene elimination by a heterolytic pathway is less significant. In contrast, owing to a pronounced charge-mediated ortho effect, the alkene loss becomes the predominant pathway for the ortho isomers of ethyl and higher esters. Results from isotope-labeled compounds confirmed that the alkene loss proceeds by a specific γ-hydrogen transfer mechanism that resembles the McLafferty rearrangement for radical cations. Even for the para compounds, if the alkoxide moiety bears structural motifs required for the elimination of a more stable alkene molecule, the heterolytic pathway becomes the predominant pathway. For example, in the spectrum of deprotonated 2-phenylethyl 4-aminobenzoate, m/z 136 peak is the base peak because the alkene eliminated is styrene. Owing to the fact that all deprotonated aminobenzoate esters, irrespective of the size of the alkoxy group, upon activation fragment to form an m/z 135 ion, aminobenzoate esters in mixtures can be quantified by precursor ion discovery mass spectrometric experiments.
Novel VEGFR-2 inhibitors with an N-acylhydrazone scaffold
Pauli, Fernanda P.,Martins, Juliana R.,Paschoalin, Thaysa,Ionta, Marisa,Barbosa, Maria Leticia C.,Barreiro, Eliezer J.
, (2020)
Vascular endothelial growth factor receptor 2 (VEGFR-2) is a tyrosine kinase that mediates a large number of cell responses associated with angiogenesis. The control of the angiogenic pathway in tumorigenesis by the inhibition of VEGFR-2 is considered a p
An ecofriendly catalytic route for the preparation of perfumery grade methyl anthranilate from anthranilic acid and methanol
Yadav,Krishnan
, p. 86 - 95 (1998)
Methyl anthranilate is a very important perfumery ester and also a precursor to a number of Schiff bases which are used in several fragrance formulations. The current practice is to use homogeneous acids as catalysts in the manufacture of methyl anthranil
Reductive carbodiazenylation of nonactivated olefins via aryl diazonium salts
Heinrich, Markus R.,Blank, Olga,Woelfel, Sabrina
, p. 3323 - 3325 (2006)
The reduction of aryl diazonium salts in the presence of nonactivated olefins provides rapid entry to carbodiazenylation products. The regioselective functionalization of double bonds is achieved in a one-pot process starting from aniline derivatives. Car
Self-Template Construction of High-Performance Co, N-Decorated Carbon Nanotubes from a Novel Cobalt Dicyandiamide Molecule
Li, Jingjing,Chen, Shuai,Liu, Mengmeng,Li, Zhihong,Dong, Zhengping,Zhang, Fengwei,Zhang, Xian-Ming
, p. 2609 - 2617 (2021)
N-doped carbon nanotubes (NCNTs) based composites have shown great prospect in catalysis relevant communities, which are often evolved from commercial CNTs and nitrogenous hybrid precursors. However, the direct fabrication of high-performance and non-nobl
A facile reduction of aromatic nitro compounds to aromatic amines by samarium and iodine
Banik, Bimal K.,Mukhopadhyay, Chhanda,Venkatraman,Becker, Frederick F.
, p. 7243 - 7246 (1998)
A simple method for the reduction of aromatic nitro compounds to aromatic amines was developed using samarium and catalytic amounts of iodine.
