Ethylenediamine-functionalized magnetic Fe3O4@SiO2 nanoparticles: cooperative trifunctional catalysis for selective synthesis of nitroalkenes

RSC Advances ◽  
2015 ◽  
Vol 5 (90) ◽  
pp. 73684-73691 ◽  
Author(s):  
Fengjun Xue ◽  
Yahao Dong ◽  
Peibo Hu ◽  
Yanan Deng ◽  
Yuping Wei
Keyword(s):  
Secondary Amine ◽  
Primary Amine ◽  
Sio2 Nanoparticles ◽  
Selective Synthesis ◽  
Oh Groups ◽  
Highly Active ◽  
Magnetic Fe3o4

The designed nanocatalyst Fe3O4@SiO2–NH2 was highly active for selective synthesis of nitroalkenes through cooperative trifunctional catalysis of primary amine, secondary amine and Si–OH groups.

Regio-, Stereo- and Enantioselective α-Addition of Carbonyl Nucleo-philes to Allenamides Catalyzed by a Synergistic Copper/Enamine System

2020 ◽  
Author(s):  
Rémi Blieck ◽  
Sebastien Lemouzy ◽  
Marc Taillefer ◽  
Florian Monnier
Keyword(s):  
Catalytic System ◽  
Secondary Amine ◽  
Primary Amine ◽  
Synergistic Catalysis ◽  
Enantioselective Addition ◽  
Amine Catalysts

A dual copper/enamine catalytic system is found to enable an intermolecular enantioselective α-addition of various carbonyl nucleophiles to allenamides. Secondary amine catalysts allowed the highly enantioselective addition of aldehydes, while using primary amine catalysts led to the enantioselective addition of ketoester nucleophiles. The process was found to be highly regio-, stereo- and enantio-selective and represented the first allene hydrofunctionalization using an synergistic catalysis involving copper

Molecular Imprinting and Immobilization of Cellulase Onto Magnetic Fe3O4@SiO2 Nanoparticles

2014 ◽  
Vol 14 (4) ◽  
pp. 2931-2936 ◽  
Author(s):  
Yue Li ◽  
Xiang-Yu Wang ◽  
Rui-Zhuo Zhang ◽  
Xiao-Yun Zhang ◽  
Wei Liu ◽  
...  
Keyword(s):  
Molecular Imprinting ◽  
Sio2 Nanoparticles ◽  
Magnetic Fe3o4

Aminkomplexe des Goldes, Teil 9: Gold(I)-halogenid-Komplexe mit primären und azyklischen sekundären Aminen und ihre Oxidation zu Gold(III)-Derivaten

2018 ◽  
Vol 73 (1) ◽  
pp. 43-74 ◽  
Author(s):  
Cindy Döring ◽  
Peter G. Jones
Keyword(s):  
Hydrogen Bonds ◽  
Structure Analysis ◽  
Secondary Amine ◽  
Primary Amine ◽  
Solvent Free ◽  
Secondary Amines ◽  
Primary Amines ◽  
Direct Reaction ◽  
X Ray

AbstractThe reaction of (tht)AuX (X=Cl or Br; tht=tetrahydrothiophene) with various primary amines L leads to products of the form [L2Au]+X−. Packing diagrams of the corresponding structures are dominated by N–H···X hydrogen bonds and (in some cases) aurophilic contacts. The cyclohexylamine derivative was already known as its dichloromethane ⅔-solvate; we have isolated the solvent-free compound and its pentane ¼-solvate, which all show different packing patterns. With acyclic secondary amines, the products are more varied; LAuX and [L2Au]+[AuX2]− were also found. These gold(I) products were generally formed in satisfactory quantities. The attempted oxidation to Au(III) derivatives with PhICl2 or Br2 proved impossible for the primary amine derivatives [although isopropylamine-trichloridogold(III) was obtained unexpectedly from the corresponding cyanide] and unsatisfactory for the secondary amine derivatives. Products LAuX3 and [L2AuX2]+[AuX4]− were identified but were formed in disappointing yields. In isolated cases protonated products (LH)+[AuCl4]−, (LH+)3[AuCl4]−(Cl−)2 or [(Et2N)2CH]+[AuBr4]− were formed, presumably by involvement of the dichloromethane solvent and/or adventitious water. Here also the yields were poor, and some products arose as mixtures. Direct reaction of amines with AuCl3 or (tht)AuX3 was also unsuccessful. All products were characterized by X-ray structure analysis.

Infrared spectra of the interactions of aniline and porous glass surfaces

1969 ◽  
Vol 47 (8) ◽  
pp. 1281-1287 ◽  
Author(s):  
M. J. D. Low ◽  
V. V. Subba Rao
Keyword(s):  
Nitrogen Atom ◽  
Aromatic Ring ◽  
Secondary Amine ◽  
Infrared Spectra ◽  
Porous Glass ◽  
Weak Interactions ◽  
Amine Group ◽  
Oh Groups ◽  
Glass Surfaces ◽  
Adsorption And Dissociation

Infrared spectra were recorded of aniline sorbed on highly dehydroxylated, deuterated, and on fluoridated porous glass as well as on pure and boria-impregnated silica. The results suggest that two types of weak interactions involving the surface SiOH and B—OH groups occurred; the nitrogen atom of the amine was hydrogen bonded to surface OH and there was an interaction between OH groups and the π system of the aromatic ring. Some aniline chemisorbed on surface boron via the nitrogen atom of the amine group. Some aniline chemisorbed dissociatively to form secondary amine structures bonded through the nitrogen to surface boron atoms and new B—OH groups formed. Surface boron impurity acted as an adsorption and dissociation center.

scholarly journals Preparation of Highly Active Monometallic Rhenium Catalysts for Selective Synthesis of 1,4‐Butanediol from 1,4‐Anhydroerythritol

ChemSusChem ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 3615-3626 ◽  
Author(s):  
Tianmiao Wang ◽  
Masazumi Tamura ◽  
Yoshinao Nakagawa ◽  
Keiichi Tomishige
Keyword(s):  
Selective Synthesis ◽  
Highly Active

A Simple Method of Protecting a Secondary Amine with Tert Butyloxycarbonyl (Boc) in the Presence of a Primary Amine

1992 ◽  
Vol 22 (16) ◽  
pp. 2357-2360 ◽  
Author(s):  
John D. Prugh ◽  
Laura A. Birchenough ◽  
Melissa S. Egbertson
Keyword(s):  
Secondary Amine ◽  
Primary Amine ◽  
Simple Method

ChemInform Abstract: Highly Active and Selective Synthesis of Imines from Alcohols and Amines or Nitroarenes Catalyzed by Pd/DNA in Water with Dehydrogenation.

ChemInform ◽  
2013 ◽  
Vol 44 (15) ◽  
pp. no-no
Author(s):  
Lin Tang ◽  
Huayin Sun ◽  
Yunfeng Li ◽  
Zhenggen Zha ◽  
Zhiyong Wang
Keyword(s):  
Selective Synthesis ◽  
Highly Active

Formic acid dehydrogenation over Pd NPs supported on amine-functionalized SBA-15 catalysts: structure–activity relationships

2017 ◽  
Vol 5 (31) ◽  
pp. 16150-16161 ◽  
Author(s):  
Katherine Koh ◽  
Mina Jeon ◽  
Chang Won Yoon ◽  
Tewodros Asefa
Keyword(s):  
Formic Acid ◽  
Secondary Amine ◽  
Tertiary Amine ◽  
Primary Amine ◽  
Catalytic Properties ◽  
Pd Nanoparticles ◽  
Structure Activity Relationships ◽  
Amine Functionalized ◽  
Structure Activity ◽  
Formic Acid Dehydrogenation

A series of Pd/SBA-15-amine materials (where “Amine” is primary amine, secondary amine and tertiary amine) containing Pd nanoparticles are synthesized and their catalytic properties for formic acid dehydrogenation are investigated.

Noncataleptic neuroleptics: Potential metabolites of 2-chloro-10-[4-(2-hydroxyethyl)piperazino]-10,11-dihydrodibenzo[b,fthiepin

1979 ◽  
Vol 44 (10) ◽  
pp. 3008-3018 ◽  
Author(s):  
Vladimír Valenta ◽  
Emil Svátek ◽  
Antonín Dlabač ◽  
Marie Bartošová ◽  
Miroslav Protiva
Keyword(s):  
Secondary Amine ◽  
Title Compound ◽  
Primary Amine ◽  
Pyridine Derivative ◽  
Oxidation Reactions ◽  
Substitution Reactions ◽  
Piperazine Derivatives ◽  
Antihistamine Activity ◽  
Hydrolysis Of ◽  
Central Depressant

The synthesis of nine potential metabolites of the title compound is being described. Using oxidation reactions, compound I was transformed to the S-oxide VII, A-oxide IX and A,S-dioxide X. Substitution reactions of 2,10-dichloro-10,11-dihydrodibenzo[b,f]thiepin with 1-ethoxycarbonylpiperazine, piperazine and ethylenediamine afforded the amines II, III, IV and XIII. Leuckart reaction of 2-chlorodibenzo[b,f]thiepin-10(11H)-one led in addition to the expected formamido derivative XI to the heptacyclic pyridine derivative XIV. Hydrolysis of compounds II and XI gave the secondary amine III and the primary amine XII. Oxidation of substances III, XII and XIII afforded the sulfoxides VIII, XV and XVI. Most of the prepared piperazine derivatives exhibit some central depressant, adrenolytic and antihistamine activity.

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