14264-16-5Relevant articles and documents
Corain, Benedetto,Longato, Bruno,Angeletti, Roberto,Valle, Giovanni
, p. 15 - 18 (1985)
On the feasibility of nickel-catalyzed trifluoromethylation of aryl halides
Jover, Jess,Miloserdov, Fedor M.,Benet-Buchholz, Jordi,Grushin, Vladimir V.,Maseras, Feliu
, p. 6531 - 6543 (2014)
A computational screening of 42 bidentate phosphines (PP) has yielded promising candidates for Ph-CF3 reductive elimination from Ni(II) complexes of the type [(PP)Ni(Ph)(CF3)]. The computed barriers and synthetic accessibility consid
Synthesis and biological evaluation of alanine derived bioactive P-toluenesulphonamide analogs
Amasiatu, Ifeanyi S.,Egbujor, Melford C.,Egu, Samuel A.,Egwuatu, Pius I.,Eze, Florence U.,Okoro, Uchechukwu C.
, p. 6449 - 6458 (2020/10/27)
Sulphonamides and carboxamides have great pharmacological importance. The purpose of the study was to synthesize alanine-derived bioactive sulphonamides bearing carboxamides and evaluate their biological activi-ties. The reaction of p-toluenesulphonyl chloride with L-alanine afforded compound 1, which was acetylated to obtain compound 2. The chlorina-tion and ammonolysis of compound 2 gave the carboxamide backbone (3) which was coupled with aryl/heteroaryl halides to afford the hybrid compounds 4, 5 and 6. Structures were confirmed by FTIR,1 H-NMR,13 C-NMR spectra and elemental analytical data. The in vitro antimicrobial properties were determined by agar dilution, and the antioxidant properties were also investigated. Molecular docking interactions of the analogues were determined using PyRx. Compounds 4, 5 and 6 exhibited excellent in vitro antimi-crobial properties in the range of 0.5-1.0mg/ml while compounds 1and 2 had half-maximal inhibitory concentration (IC50) of 1.11±0.15μg/ml and 1.12±0.13μg/ml respectively. For the molecular docking studies, compounds 5 and 6 displayed the best antitrypanosomal activity with binding affinities of-13.95 and-13.51kcal/mol respectively while compound 4 showed the highest in silico antimalarial activity having binding affinity of-11.95kcal/mol. All the alanine derived sulphonamides were observed to be potential antimicrobial, antioxidant, antitrypanosomal and antimalarial agents following the biological activities studies.
Catalysis of Cross-Coupling and Homocoupling Reactions of Aryl Halides Utilizing Ni(0), Ni(I), and Ni(II) Precursors; Ni(0) Compounds as the Probable Catalytic Species but Ni(I) Compounds as Intermediates and Products
Manzoor, Adeela,Wienefeld, Patrick,Baird, Michael C.,Budzelaar, Peter H.M.
, p. 3508 - 3519 (2017/10/03)
Both Ni(0) and Ni(I) compounds are believed to exhibit cross-coupling catalytic properties under various conditions, and the compounds Ni(PPh3)4 and NiCl(PPh3)3 are compared as catalysts for representative Suzuki-Miyaura and Heck-Mizoroki cross-coupling reactions. The Ni(0) compound exhibits catalytic activities, for cross-coupling of chloro and bromoanisole with phenylboronic acid and of bromobenzene with styrene, yielding results which are comparable with those of many palladium-based catalysts, but our findings with NiCl(PPh3)3 are at this point unclear. It seems to convert to catalytically active Ni(0) species under Suzuki-Miyaura reaction conditions and is ineffective for Heck-Mizoroki cross-coupling. The paramagnetic Ni(I) compounds NiX(PPh3)3 (X = Cl, Br, I) are characterized for the first time by 1H NMR spectroscopy and are found to exhibit broad meta and para resonances at δ 9-11 and 3-4, respectively, and very broad ortho resonances at δ 46; these resonances are very useful for detecting Ni(I) species in solution. The chemical shifts of NiCl(PPh3)3 vary with the concentration of free PPh3, with which it exchanges, and are also temperature-dependent, consistent with Curie law behavior. The compound trans-NiPhCl(PPh3)2, the product of oxidative addition of chlorobenzene to Ni(PPh3)4 and a putative intermediate in cross-coupling reactions of chlorobenzene, is found during the course of this investigation to exhibit entirely unanticipated thermal lability in solution in the absence of free PPh3. It readily decomposes to biphenyl and NiCl(PPh3)2 in a reaction relevant to the long-known but little-understood nickel-catalyzed conversion of aryl halides to biaryls. Ni(I) and biphenyl formation is initiated by PPh3 dissociation from trans-NiPhCl(PPh3)2 and formation of a dinuclear intermediate, a process which is now better defined using DFT methodologies.