130517-96-3Relevant articles and documents
Synthesis and characterization of Ni(II) complexes with functionalized dithiocarbamates: New single source precursors for nickel sulfide and nickel-iron sulfide nanoparticles
Sathiyaraj,Thirumaran,Ciattini, Samuele,Selvanayagam
, (2019)
Six Ni(II) complexes, bis(N-benzyl-N-substituted benzyldithiocarbamato-S,S′)nickel(II) (1–3), (N-benzyl-N-substituted benzyldithiocarbamato-S,S′)(thiocyanato-N)(triphenylphosphine)nickel(II) (4–6), [Substituted benzyl=4-hydroxybenzyl (1, 4), 4-methoxybenzyl (2, 5), 4-chlorobenzyl (3, 6)] complexes have been synthesized and characterized by elemental analysis, IR, UV–Vis and NMR (1H and 13C) spectroscopy. Upfield shift of NCS2 carbon signals of heteroleptic complexes compared to homoleptic complexes supports the back bonding effect of triphenylphosphine. Structures of complexes 1, 4, 5 and 6 have been obtained by single crystal X-ray diffraction. The coordination geometry around nickel is a distorted square planar in all the complexes. Intramolecular Ni?H-C anagostic interaction is observed in 4. Various non-covalent interactions such as C-H?π(chelate), C-H?π and C-H?X (X = O and Cl) lead to supramolecular aggregation. [Ni(dbdtc)2] and [Ni(dbdtc)3][FeCl4] (dbdtc = N,N-dibenzyldithiocarbamate) were used to prepare monometallic sulfide (nickel sulfide), bimetallic sulfide (iron-nickel sulfide) nanoparticles. TEM images of nickel sulfide and iron-nickel sulfide reveal that the particles are oval shape and ultrafine (～5–10 nm), respectively.
Facile synthesis of litchi shaped cuprous oxide and its application in the aerobic oxidative synthesis of imines
Bai, Lei,Dang, Zheng
, p. 10341 - 10345 (2015)
In the present work, uniform litchi shaped cuprous oxide (Cu2O) nanoaggregates were synthesized via a facile method by employing copper(ii) chloride, sodium hydroxide, ethylene glycol and ascorbic acid in the absence of surfactants at room temperature. With further increase of the reaction temperature, broken hollow copper nanoaggregates were obtained. The structure of a Cu2O nanoaggregate was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Transmission Electron Microscopy (TEM), Brunauer-Emmett-Teller (BET) analysis and High Resolution Transmission Electron Microscopy (HRTEM). The as-obtained Cu2O nanoaggregates showed efficient catalytic activities in the aerobic oxidative synthesis of imines.
Solvent-free synthesis of racemic α-aminonitriles
Baeza, Alejandro,Najera, Carmen,Sansano, Jose M.
, p. 1230 - 1234 (2007)
A very simple one-step, environmentally friendly procedure for the synthesis of α-aminonitriles from aldehydes and ketones, using trimethylsilyl cyanide in the absence of solvent, is reported. The active catalyst of this three-component (Strecker) reaction was the amine employed in the transformation. In general, aldehydes react more rapidly than ketones and give almost quantitative yields of the corresponding α-aminonitriles in less than fifteen minutes. However, only cyclic ketones afford the corresponding α-aminonitriles in excellent chemical yields under these conditions. Georg Thieme Verlag Stuttgart.
Condensation of laterally lithiated o-methyl and o-ethyl benzamides with imines mediated by (-)-sparteine. Enantioselective synthesis of tetrahydroisoquinolin-1-ones
Derdau,Snieckus
, p. 1992 - 1998 (2001)
The first asymmetric synthesis of tetrahydroisoquinolin-1-ones using a (-)-sparteine-mediated lateral metalation-imine addition sequence to furnish 3-phenyl tetrahydroisoquinolinones 3a with enantioselectivities up to 81% ee is described (Scheme 4). For amide 7b, imine addition products 10 and 11 have been obtained with high diastereoselectivities (91-97% de) and enantioselectivities (91-98% ee) (Scheme 8).
Mechanochemical lignin-mediated strecker reaction
Dabral, Saumya,Turberg, Mathias,Wanninger, Andrea,Bolm, Carsten,Hernández, José G.
, (2017)
A mechanochemical Strecker reaction involving a wide range of aldehydes (aromatic, heteroaromatic and aliphatic), amines, and KCN afforded a library of α-aminonitriles upon mechanical activation. This multicomponent process was efficiently activated by li
Nickel Complexes Bearing N,N,O-Tridentate Salicylaldiminato Ligand: Efficient Catalysts for Imines Formation via Dehydrogenative Coupling of Primary Alcohols with Amines
Han, Zhangang,Hao, Zhiqiang,Lin, Jin,Lu, Guo-Liang,Zhang, Junhua,Zhang, Xiaoying
, p. 3843 - 3853 (2021/11/18)
Treatment of salicylaldiminato ligand L1H-L2H (L1H = 2,4-di-tert-butyl-6-((quinolin-8-ylimino)methyl)phenol; L2H = 2,4-di-tert-butyl-6-(((2-(diethylamino)ethyl)imino)methyl)phenol) with Ni(OAc)2·4H2O in refluxing ethanol afforded nickel complexes [(L1)Ni(OAc)] (1) and [(L2)Ni(OAc)] (2), respectively. Reaction of L3H (L3H = (2,4-di-tert-butyl-6-(((2-(pyridin-2-yl)ethyl)imino)methyl)phenol)) with Ni(OAc)2·4H2O in the presence of excess triethylanmine gave the dual ligands coordinated nickel complex [(L2)2Ni] (3). Complexes 1-3 were well characterized by high-resolution mass spectrometry, infrared spectroscopy, elemental analysis, and X-ray diffraction analysis. All the three Ni(II) complexes exhibited efficient activity and good selectivity in the acceptorless dehydrogenative coupling of alcohols and amines to produce imines and diimines. The present protocol provides an atom-economical and sustainable route for the synthesis of various imine derivatives by employing an earth-abundant nickel salt and easily prepared salicylaldiminato ligands.
Time-Dependent Switching of Constitutional Dynamic Libraries and Networks from Kinetic to Thermodynamic Distributions
He, Meixia,Lehn, Jean-Marie
supporting information, p. 18560 - 18569 (2019/11/21)
The distribution of the constituents of a constitutional dynamic library (CDL) may undergo time-dependent changes as a function of the kinetics of the processes generating the CDL from its components. Thus, the constitutional dynamic network (CDN) representing the connections between the constituents changes from a kinetic distribution to the thermodynamic one as a function of time. We investigated the behavior of dynamic covalent libraries (DCLs) of four constituents generated by reversible formation of C═N bonds between four components, 2 aldehydes and 2 amino compounds, both in absence and in the presence of metal cations. The associated [2 × 2] networks underwent time-dependent changes from the initial kinetic distribution to the final thermodynamic one, involving an orthogonal switch from one diagonal to the other diagonal of the square [2 × 2] network leading to a very large change in distribution. The DCL constituents could be switched from kinetic products (imines) to thermodynamic products (oximes or acylhydrazones) based on the reactivities of the components and the thermodynamic stabilities of the constituents without addition of any external effector, solely on the basis of the intrinsic properties of the self-contained system. Such processes were achieved for purely organic DCLs/CDNs as well as for inorganic ones containing two metal cations, the latter changing from the silver(I) complex of an imine (kinetic product) to the zinc(II) complex of a hydrazone (thermodynamic product). The results bear relationship to out-of-equilibrium systems concerning kinetic behavior in adaptive chemistry.
