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Asok K Mallik – 1st expert on this subject based on the ideXlab platform
synthesis of flavanones by use of anhydrous potassium carbonate as an inexpensive safe and efficient basic catalystChemInform, 2012Co-Authors: Rina Mondal, Arpita Das Gupta, Asok K MallikAbstract:
The synthesis of the target compounds can be achieved from 2′-hydroxychalcones or from an equimolar mixture of 2-Hydroxyacetophenones and aromatic aldehydes.
synthesis of flavanones by use of anhydrous potassium carbonate as an inexpensive safe and efficient basic catalystTetrahedron Letters, 2011Co-Authors: Rina Mondal, Arpita Das Gupta, Asok K MallikAbstract:
Abstract Anhydrous potassium carbonate has been utilized as an inexpensive, safe, and efficient basic catalyst for the synthesis of flavanones starting either from 2′-hydroxychalcones or from 2′-hydroxyacetophenones. In both the cases the favored reaction condition was either refluxing in a solvent with added catalyst or microwave irradiation on the catalyst.
Periasamy Viswanathamurthi – 2nd expert on this subject based on the ideXlab platform
new ruthenium ii carbonyl complexes bearing disulfide schiff base ligands and their applications as catalyst for some organic transformationsSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2014Co-Authors: Govindan Prakash, Periasamy ViswanathamurthiAbstract:
Abstract Schiff base disulfide ligands (H2L1−6) were synthesized from the condensation of cystamine with salicylaldehyde(H2L1), 5-chlorosalicylaldehyde(H2L2), o-vanillin(H2L3), 2-Hydroxyacetophenone(H2L4), 3-methyl-2-Hydroxyacetophenone(H2L5), and 2-hydroxy-1-naphthaldehyde(H2L6). H2L1−6 reacts with the ruthenium precursor complex [RuHCl(CO)(PPh3)3] in benzene giving rise to six new ruthenium(II) complexes of general formula [Ru(CO)L1−6]. Characterization of the new complexes was carried out by using elemental and spectral (IR, UV–Vis, NMR (1H and 13C) and Mass) techniques. An octahedral geometry was assigned for all the complexes based on the spectral data obtained. The catalytic efficiency of the new complexes in aldehyde to amide conversion in the presence of NaHCO3, N-alkylation of aniline in the presence of t-BuOK, and transfer hydrogenation of ketones in the presence of iPrOH/KOH reactions were studied. Furthermore, the effect of solvents and catalyst/substrate ratio on the catalytic aldehyde to amide conversion were also discussed.
Mohan M. Patel – 3rd expert on this subject based on the ideXlab platform
Synthesis, characterization and thermal studies of polychelates derived from 2-Hydroxyacetophenone-thiourea-trioxane resinThermochimica Acta, 1992Co-Authors: Hemendra B. Pancholi, Mohan M. PatelAbstract:
Abstract Polychelates of copper(II), nickel(II), cobalt(II), manganese(II), zinc(II), oxovanadium(IV) and dioxouranium(VI) with 2-Hydroxyacetophenone-thiourea-trioxane resin have been synthesized. Elemental analyses of the polychelates indicate 1:2 (metal:ligand) ratio. The structures of the polychelates have been assigned on the basis of their elemental analyses, IR and reflectance spectra and magnetic measurements. Thermal studies of polychelates have been carried out to determine their mode of decomposition, apparent activation energy and the order of each thermal reaction. Electrical conductivity behaviour of resin and its polychelates has also been studied.
2-Hydroxyacetophenone-thiourea-trioxane resins and their thermal studiesThermochimica Acta, 1992Co-Authors: Hemendra B. Pancholi, Mohan M. PatelAbstract:
Abstract Resins have been synthesised by the condensation of 2-Hydroxyacetophenone (HA) with thiourea (T) and trioxane (T’) in the presence of 2 M HCl/H 2 SO 4 as a catalyst, with varying molar proportions of the reactants. The resins were characterised by elemental analyses, IR spectral study, number-average molecular weights and viscosity. Thermal studies of the resins have been carried out to determine their mode of decomposition, apparent activation energy and the order of each thermal reaction.