130995-69-6Relevant academic research and scientific papers
Sonochemical Preparation of Dipicolinamide Mn-complexes and Their Application as Catalysts Towards Sono-synthesis of Ketones
Arafa, Wael A. A.
, p. 1403 - 1412 (2019)
A series of non-heme Mn-complexes has been synthesized by the sonication of manganese (II)chloride and bis-amides (condensation products of 2-picolinic acid and o-phenylenediamines). The Mn-complexes effectively promote the oxidation of unactivated aliphatic and benzylic C─H and N-bearing heterocycles substrates with low catalyst loading using eco-friendly hydrogen peroxide in the presence of acetic acid as additive under ultrasonic irradiation. Chromatographic studies revealed that the corresponding ketones are the only detectable products. Noteworthy, the presence of electron donors in the catalyst structure significantly increased the reaction yields. The substantial lowering of the oxidation reaction yields by adding ionol (2,6-di-tert-butyl-4-methylphenol) as a free radical trap suggesting a free radical reaction pathway.
Cobalt(III) Alkyl Complexes of 1,2-Bis(2-pyridinecarboxamido)benzene (H2bpb) and 4,5-Dichloro-1,2-bis(2-pyridinecarboxamido)benzene (H2ppc) and X-Ray Crystal Structures of and
Mak, Shing-Tat,Wong, Wing-Tak,Yam, Vivian Wing-Wah,Lai, Tingo-Fong,Che, Chi-Ming
, p. 1915 - 1922 (1991)
A series of organo and non-organo cobalt complexes of bpb and bpc ligands have been synthesised.Complexes prepared include Na, NaCoL(N3)
New cobalt, iron and chromium catalysts based on easy-to-handle N 4-chelating ligands for the coupling reaction of epoxides with CO2
Adolph,Zevaco,Altesleben,Walter,Dinjus
supporting information, p. 3285 - 3296 (2014/03/21)
In this contribution, we report the successful utilization of several transition metal complexes based on substituted N4-N,N-bis(2- pyridinecarboxamide)-1,2-benzene chelating ligands as catalysts in the coupling of epoxides with carbon dioxide.
Syntheses, Electrochemistry and Reactivities of Pyridine Amide Complexes of Chromium(III) and Manganese(III)
Leung, Wa-Hung,Ma, Ji-Xiang,Yam, Vivian Wing-Wah,Che, Chi-Ming,Poon, Chung-Kwong
, p. 1071 - 1076 (2007/10/02)
Reactions of anhydrous CrCl3 with H2bpb and H2bpc in dimethylformamide and manganese(III) acetate with H2bpc in methanol, yielded the respective *xH2O, *H2O and complexes.The electrochemistry of the chromium(III) amide complexes has been studied by cyclic voltammetry.They exhibit reversible oxidation couples with E0 values ranging from 0.28 to 0.80 V vs. ferrocenium-ferrocene.Except for (1-) which has a quasireversible reduction couple at -1.97 V, the electrochemical reductions are irreversible.The complexes ClO4, and have been shown to catalyse olefin epoxidation by iodosobenzene.With , catalytic oxidation of alkanes by PhIO has also been observed.An oxygen-rebound mechanism involving a Mn(V)=O or a Cr(V)=O intermediate is proposed for the PhIO oxidation reactions.
