Substrate dependent synergetic and antagonistic interaction of ammonium halide and polyoxometalate catalysts in the synthesis of cyclic carbonates from oleochemical epoxides and CO2
作者:Jens Langanke、Lasse Greiner、Walter Leitner
DOI:10.1039/c3gc36710j
日期:——
Organic halides and polyoxometalates (POMs) were studied as catalyst systems for the insertion of carbon dioxide into epoxides originating from plant oils as biogenic feedstock. In the formation of methyl oleate carbonate, synergistic rate acceleration and increased cis-selectivity were observed using ammoniumhalide and transition metal substituted silicotungstate POMs catalysts in a combined system
Mild catalytic oxidations of unsaturated fatty acid methyl esters (FAMEs) by oxovanadium complexes
作者:Martina Maya Cecchini、Francesco De Angelis、Claudio Iacobucci、Samantha Reale、Marcello Crucianelli
DOI:10.1016/j.apcata.2016.01.045
日期:2016.5
A selection of unsaturatedfattyacidmethylesters, namely methyl oleate (C18:1), methyl linoleate (C18:2) and methyl linolenate (C18:3) has been oxidized under mild homogeneous catalytic conditions, using a series of oxovanadium(IV) complexes containing 4-acyl-5-pyrazolone donor ligands with different substituents on acyl residue. The main goal was to evaluate the catalytic role exerted by oxovanadium(IV)
Fatty acid based biocarbonates: Al-mediated stereoselective preparation of mono-, di- and tricarbonates under mild and solvent-less conditions
作者:L. Peña Carrodeguas、À. Cristòfol、J. M. Fraile、J. A. Mayoral、V. Dorado、C. I. Herrerías、A. W. Kleij
DOI:10.1039/c7gc01206c
日期:——
A catalytic method for the preparation of a series of fatty acid derived biocarbonates has been developed using a binary Al-complex/PPNCl catalyst. This catalyst system allows conversion of fatty acid derived epoxides under comparatively mild reaction conditions (70–85 °C, 10 bar) while maintaining high levels of diastereospecificity with cis/trans ratios of up to 97:3 in the products. The comparative
Plasticizer and Surfactant Formation from Food-Waste- and Algal Biomass-Derived Lipids
作者:Daniel Pleissner、Kin Yan Lau、Chengwu Zhang、Carol Sze Ki Lin
DOI:10.1002/cssc.201402888
日期:2015.5.22
potential of lipids derived from food‐waste and algal biomass (produced from food‐waste hydrolysate) for the formation of plasticizers and surfactants is investigated herein. Plasticizers were formed by epoxidation of double bonds of methylated unsaturated fatty acids with in situ generated peroxoformic acid. Assuming that all unsaturated fatty acids are convertible, 0.35 and 0.40 g of plasticizer can be
Annonaceousacetogenins (ACG), an extensive group of cytotoxic natural products, are antitumor agents whose main mode of action is inhibition of the mammalian mitochondrial complex I. Herein we describe the importance of the different chemical groups along the alkyl chain for optimal inhibitory potency, discussing the structurally relevant factors present in these compounds. For this purpose, a series