Trinuclear cis-dioxidomolybdenum(VI) complexes of compartmental C symmetric ligands: Synthesis, characterization, DFT study and catalytic application for hydropyridines (Hps) via the Hantzsch reaction
作者:Mannar R. Maurya、Reshu Tomar、Puneet Gupta、Fernando Avecilla
DOI:10.1016/j.poly.2020.114617
日期:2020.8
electrochemical study, elemental analysis, thermogravimetric study and single crystal X-ray diffraction of the ligand III and complexes 1 and 5. In the presence of H2O2 as an oxidant, these complexes show excellent catalytic potential towards the one-pot three-components [ethylacetoacetate, benzaldehyde (or its derivatives) and ammonium acetate] dynamic covalent assembly in the Hantzsch reaction. Under solvent
A novel green and efficient one-pot three-component synthesis of 2-aryl-pyridines in good to excellent yields has been reported. The methodology initially involved the formation of 1,2-dihydropyridine intermediates via reaction of a variety of aromatic aldehydes with ethyl (methyl) acetoacetate and ammonium acetate, which were the same starting materials as the Hantzsch reaction, under solvent-, catalyst- and heat-free (at room temperature) conditions, followed by air oxidation for 72 hours. In this paper, we also systematically reinvestigated the classic Hantzsch reaction under different reaction conditions, analyzed the main products as well as byproducts, corrected some mistakes in the literature and elucidated the reaction mechanism.