102-69-2Relevant articles and documents
Aminated Polystyrene-Bound Rhodium Carbonyl Clusters as a Catalyst for Deoxygenation of Various N-O Bonds
Kaneda, Kiyotomi,Takemoto, Tetsuya,Imanaka, Toshinobu
, p. 1759 - 1762 (1988)
Aminated polystyrene-bound rhodium carbonyl cluster complexes are prepared by treatment of Rh6(CO)16 with various aminated polystyrenes.The polymeric rhodium complexes show a catalytic activity for deoxygenation of nitro compounds, oximes, hydroxylamines, and N-oxides under the conditions using CO and H2O.The recovered rhodium complexes maintain the deoxygenation ability with a small loss of the selectivity.
A practical and benign synthesis of amines through Pd@mpg-C 3N4 catalyzed reduction of nitriles
Li, Yi,Gong, Yutong,Xu, Xuan,Zhang, Pengfei,Li, Haoran,Wang, Yong
, p. 9 - 12 (2012)
Liquid phase hydrogenation of nitriles is an important method for the production of amines, which find a variety of applications as intermediates in chemical and pharmaceutical industry. In the present work, a highly efficient Pd@mpg-C3N4 catalytic system has been developed for chemoselective reduction of nitriles providing good to excellent conversion with remarkable chemoselectivity (up to 99%) without additives. Compared with homogeneous catalyst systems, the developed protocol is more advantageous due to the use of ambient hydrogen, solvent free and effective catalyst recyclability.
The selective preparation of n-propylamines by the rhodium catalysed reaction of ethylene and syngas with alkylamines
Jones, M. D.
, p. 403 - 408 (1989)
The aminoethylation of ethylene with a primary amine has been shown to provide a highly selective route to n-propylamines; the rhodium catalysed reaction of n-propylamine with ethylene and syngas (2/1, H2/CO) affords di-n-propylamine with 98percent selectivity (with respect to ethylene).The reaction of amines of the type RR1NH with the ethylene/syngas mixture and a rhodium catalyst provides a highly selective and general route to the n-propylamines RR1NPr (R=Pr, R1=H; R=t-Bu, R1=H; R=n-Bu, R1=H; R=C8H17, R1=H, R=R1=Pr; R=HOCH2Ch2, R1=H, and R=PhCH(OH)CH2, R1=H).
Alkyl substituent effect on the polarity of phenols-tri-n-alkylamine complexes
Pawelka, Zbigniew,Zeegers-Huyskens, Therese
, p. 1012 - 1018 (2003)
The formation constants and the dipole moments of the H-bonded adducts of 1:1 and 2:1 stoichiometries formed between three different phenols (phenol, 2,4,6-trichlorophenol, and 2,4-dinitrophenol) and different tri-n-alkylamines are determined in solvents
Continuous Production of Dialkylamines by Selective Hydrogenation of Nitriles on a Nickel-Zeolite Catalyst
Popov, Yu. V.,Mokhov,Latyshova,Panov,Pletneva, M. Yu.
, p. 1778 - 1782 (2017)
Hydrogenation of aliphatic nitriles in the presence of nickel supported by NaX zeolite was studied. The data obtained were used to develop a continuous method for obtaining dialkylamines with the yield of the target product of up to 98%.
Chemical modification of niobium layered oxide by tetraalkylammonium intercalation
Shiguihara, Ana L.,Bizeto, Marcos A.,Constantino, Vera R. L.
, p. 1366 - 1376 (2010)
Chemical modification of the layered K4Nb6O 17 material was systematically investigated through the reaction of its proton-exchanged form (H2K2Nb6O 17) in alkaline solutions containing tetramethylammonium (tma +), tetraethylammonium (tea+) or tetrapropylammonium (tpa+) cations. The intercalated amount reaches 50percent (for tma +), 25percent (for tea+) and 15percent (for tpa+) of the H2K2Nb6O17 negative charge (concerning the exchange at interlayer I) due to the steric hindrance of larger cations. Hexaniobate samples present (020) basal reflections equal to 23.0, 26.3 and 26.5 A? once intercalated respectively with tma+, tea + and tpa+. When samples are heated above 200-250 °C, CO2 evolution is observed; Hofmann elimination reaction is also detected for hexaniobate-tpa+ samples. Scanning electron microscopy images show the predominance of plate-like particles; stick-like particles are also observed for samples containing bulky ions. The intercalation reaction is promoted in the order tma+ > tea+ > tpa+, while the formation of a dispersion of colloidal particles is facilitated in the inverse order.
The conversion of 1-propanamine on copper-containing MFI and BEA zeolites prepared by aqueous and vapor ion-exchange
Guidry, Trent F.,Price, Geoffrey L.
, p. 16 - 27 (1999)
A process has been developed for exchanging one Cu atom per ion exchange site in an MFI zeolite. The material is synthesized by reaction of the acidic zeolite with CuCl vapor, followed by oxidation with oxygen, and conversion of the Cu2+ species to copper hydroxyl ions and copper hydroxyl dimers by reaction of the oxidized material with water upon exposure to humid air. This material, a similarly prepared BEA material, and copper-containing MFI and BEA zeolites prepared by conventional aqueous ion-exchange have been comparatively investigated for the conversion of 1-propanamine. Reaction products include C6 products such as dipropanamine and 1-propanamine, N-(1-propylidene). A bifunctional acid/metal reaction pathway is proposed to account for the observed products.
About selenidostannates. I: Synthesis, structure, and properties of [Sn2Se6]4-, [Sn4Se10]4-, and [Sn3Se7]2-
Fehlker, Andreas,Blachnik, Roger
, p. 411 - 418 (2001)
The selenidostannates [(C4H9)2NH2]4Sn 2Se6·H2O (I), [(C4H9)2NH2]4Sn 4Se10·2H2O (II) und [(C3H7)3NH]2-Sn3Se 7 (III) were prepared by hydrothermal syntheses from the elements and the amines. I crystallizes in the monoclinic spacegroup P21/n (a = 1262.9(3) pm, b = 1851.3(4) pm, c = 2305.2(4) pm, β = 104.13(3)° and Z = 4). The [Sn2Se6]4- anion consists of two edge-sharing tetrahedra. II crystallizes in the orthorhombic spacegroup Pna21 (a = 2080.3(4) pm, b = 1308.2(3) pm, c = 2263.5(5) pm and Z = 4). The anion is formed from four SnSe4 tetrahedra which are joined by common corners to the adamantane cage [Sn4Se10]4-. III crystallizes in the orthorhombic spacegroup Pbcn (a = 1371.1(3) pm, b = 2285.4(5) pm, c = 2194.7(4) pm and Z = 8). The anion is a chain, built from edge-sharing [Sn3Se5Se4/2]2- units, in which two corner sharing tetrahedra are connected to a trigonal bipyramid by an edge of one and a corner of the other tetrahedron. The results of the TG/DSC measurements and of temperature dependent X-ray diffractograms reveal that I and II decompose at first by release of minor quantities of triethylammonium to compounds with layer structure and larger cell dimensions. At still higher temperature the rest of triethylammonium and H2Se is evolved, leaving SnSe2 and Se in the bulk. The former decomposes partially at the highest temperature to SnSe. In the measurements of III the complex intermediate compound was not observed. III decomposes directly to SnSe2. Wiley-VCH Verlag GmbH, 2001.
Protonation Dynamics of 2(μ-CO)(μ-C=CH2) and Decomposition Processes for 2(μ-CO)(μ-C=CH2)H(+) in the Gas Phase
Jacobson, D. B.
, p. 1626 - 1634 (1989)
The proton affinity (PA) and site of protonation of 2(μ-CO)(μ-C=H2) (2), as well as the decomposition processes for 2(μ-CO)(μ-C=CH2)H(+) (7), are studied in the gas phase by using Fourier transform mass spectrometry (FTMS).The
A Lewis Base Nucleofugality Parameter, NFB, and Its Application in an Analysis of MIDA-Boronate Hydrolysis Kinetics
García-Domínguez, Andrés,Gonzalez, Jorge A.,Leach, Andrew G.,Lloyd-Jones, Guy C.,Nichol, Gary S.,Taylor, Nicholas P.
supporting information, (2022/01/04)
The kinetics of quinuclidine displacement of BH3 from a wide range of Lewis base borane adducts have been measured. Parameterization of these rates has enabled the development of a nucleofugality scale (NFB), shown to quantify and predict the leaving group ability of a range of other Lewis bases. Additivity observed across a number of series R′3-nRnX (X = P, N; R′ = aryl, alkyl) has allowed the formulation of related substituent parameters (nfPB, nfAB), providing a means of calculating NFB values for a range of Lewis bases that extends far beyond those experimentally derived. The utility of the nucleofugality parameter is explored by the correlation of the substituent parameter nfPB with the hydrolyses rates of a series of alkyl and aryl MIDA boronates under neutral conditions. This has allowed the identification of MIDA boronates with heteroatoms proximal to the reacting center, showing unusual kinetic lability or stability to hydrolysis.
