130995-69-6Relevant articles and documents
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.
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.
