2777-58-4Relevant articles and documents
Oxygenation of monoenoic fatty acids by CYP175A1, an orphan cytochrome P450 from thermus thermophilus HB27
Goyal, Sandeep,Banerjee, Shibdas,Mazumdar, Shyamalava
, p. 7880 - 7890 (2013/01/15)
The catalytic activity of CYP175A1 toward monooxygenation of saturated and monounsaturated fatty acids of various chain lengths (C16-C24) has been investigated to assess the enzymatic properties of this orphan thermostable cytochrome P450 enzyme. The resu
Polymers and surfactants on the basis of renewable resources
Warwel, Siegfried,Bruese, Falk,Demes, Christoph,Kunz, Michael,Klaas, Mark Ruesch gen
, p. 39 - 48 (2007/10/03)
A new strategy for the preparation of different polymers and special surfactants was developed. First, unsaturated fatty acid methyl esters obtained from plant oils were converted to terminally unsaturated esters and α-olefins by metathesis with ethylene using heterogeneous rhenium or homogeneous ruthenium catalysts. These esters were directly copolymerized with ethylene by an insertion-type palladium-catalyzed polymerization to functionalized polyolefins. Polyesters were synthesized by metathetical dimerization of ω-unsaturated esters and subsequent polycondensation of the produced internally unsaturated dicarboxylic esters or by acidic transesterification with petrochemical diols and additional acyclic diene metathesis polymerization, ω-epoxy fatty acid methyl esters, achieved by a new method of chemo-enzymatic epoxidation, were converted into polyethers with comb-structure catalyzed by aluminoxanes on the one hand and into sugar surfactants by nucleophilic ring-opening with amino carbohydrates on the other hand.
Potentional-controlled catalytic hydrogenation. Effect of palladium catalyst potential on the selectivity of hydrogenation of polyunsaturated fatty acid esters
Froeling, A.,Hornung, F.,Jongh, R. O. de
, p. 123 - 128 (2007/10/02)
Hydrogenation of methyl linoleate on palladium catalysts in solution with tetraalkylammonium perchlorate as electrolyte, leads mainly to the saturated product methyl stearate.At negative potentials of the catalyst electrode controlled at about -1 Volt versus a saturated calomel electrode (SCE) with negligible current passage, the monoenic intermediate is the end product, with the double bond found mainly in the Z configuration at the starting 9- and 12-positions.As expected it was found that methyl oleate was not hydrogenated by the catalyst held at -1.1 Volt, while smooth hydrogenation occurs under identical conditions when the catalyst potential is not controlled.Methyl linoleate leads mainly to dienoic esters at -1.8 V catalyst potential.The effect was applied on a synthetic scale in the hydrogenation of soya bean oil with palladium catalysts, resulting in a considerable increase of selectivity at negative catalyst potentials.
