7650-84-2Relevant academic research and scientific papers
Alkyl diphenyl phosphine and preparing alkyl diphenyl phosphine payment proportional to production alkyl benzene
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Paragraph 0039; 0042-0045, (2017/08/25)
The invention discloses alkyl diphenylphosphine and a method for preparing alkyl diphenylphosphine with co-production of alkylbenzene. The structural formula of alkyl diphenylphosphine is shown in a formula I. The method comprises: adding triphenylphosphine and metal lithium into an organic solvent for reaction for 3-6 hours at room temperature; and cooling the reaction system to 0-10 DEG C, adding halogenated straight-chain alkane for insulating reaction, then raising the temperature of the system to 30-80 DEG C, keeping the temperature to react for 1-3 hours, removing the organic solvent and reducing the pressure and distilling to separately obtain alkyl diphenylphosphine and alkylbenzene. According to the alkyl diphenylphosphine disclosed by the invention, alkyl is directly bonded with P, so that the alkyl diphenylphosphine can be dissolved in most solvents and can be used as a ligand for homogeneous catalysts. By virtue of the method disclosed by the invention, high value straight-chain alkylbenzene is co-produced while straight-chain alkyl diphenylphosphine is prepared by way of a one-pot process. Use of chloro-tert-butane which is relatively high in price and waste of the metal lithium are avoided. The method is simple to operate, efficient, low in energy consumption, low in cost and suitable for large-scaled industrial production.
With machine phosphine molybdenum complex, preparation method and application
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Paragraph 0041; 0048-0050, (2017/08/31)
The invention discloses an organic phosphonium molybdenum complex, a preparation method and application. The organic phosphonium molybdenum complex has the following general formula: Mo[P(Ph)2R]2Cl5, wherein the P(Ph)2R is alkyldiphenylphosphine; the R is linear-chain alkyl with the carbon atom number of 3-10. According to the organic phosphonium molybdenum complex provided by the invention, alkyldiphenylphosphine is adopted as the ligand, and the organic phosphonium molybdenum complex can be dissolved in dicyclopentadiene, and can form a homogeneous system with dicyclopentadiene when used as a main catalyst to catalyze dicyclopentadiene for ring opening polymerization, so that the catalytic efficiency is greatly improved, and the production efficiency of polydicyclopentadiene is improved; the organic phosphonium molybdenum complex is relatively high in catalytic activity, and the polydicyclopentadiene product prepared through adopting the organic phosphonium molybdenum complex as the main catalyst is high in quality and excellent in the mechanical properties, such as, tensile strength and impact strength; the organic phosphonium molybdenum complex is relatively high in chemical stability, insensitive to air and moisture, simple in preparation, low in cost and suitable for popularization and application.
Raney-Ni reduction of phosphine sulfides
Demchuk, Oleg M.,?wierczyńska, Wioletta,Dziuba, Kamil,Frynas, S?awomir,Flis, Anna,Pietrusiewicz, K. Micha?
, p. 64 - 68 (2016/12/24)
A variety of tertiary phosphine sulfides have been reduced by Raney-Ni to give the corresponding phosphineswith high efficiency and undermild conditions. Alkyl, aryl, acyclic, cyclic, aswell as sterically crowded phosphine sulfides are reduced with equal facility. Optically active P-stereogenic phosphine sulfides are reduced stereospecifically with clean retention of configuration at P. Reductions of unsaturated phosphinesulfides is not fully chemoselective and takes place with concomitant partial reduction of the double bond. Clean reduction of the unsaturated phosphine sulfides to the corresponding fully saturated phosphines can be achieved in one step by running the reduction under H2atmosphere (balloon).
Efficient catalytic hydrogenation of levulinic acid: A key step in biomass conversion
Tukacs, Jozsef M.,Kiraly, David,Stradi, Andrea,Novodarszki, Gyula,Eke, Zsuzsanna,Dibo, Gabor,Kegl, Tamas,Mika, Laszlo T.
supporting information; experimental part, p. 2057 - 2065 (2012/08/14)
γ-Valerolactone (GVL) has been proposed as a sustainable liquid, and could be used for the production of hydrocarbons by using both homogeneous and heterogeneous catalytic systems. The selective reduction of levulinic acid (LA) to GVL is a key transformation for biorefinery concepts based on platform molecules. We report a detailed investigation of the conversion of LA to GVL using molecular hydrogen in the presence of a catalyst in situ generated from Ru(acac)3, and electronically and sterically characterized alkyl-bis(m-sulfonated-phenyl)- and dialkyl-(m-sulfonated-phenyl)phosphine (RnP(C6H4-m-SO3Na)3-n (n = 1 or 2; R = Me, Pr, iPr, Bu, Cp) ligands. The hydrogenation experiments were performed in the range of 5-100 bar H2 at 140 °C using 0.016 mol% catalyst and 5-20 eqv. of ligand. The effects of hydrogen pressure and Ru/ligand ratio on the LA conversion were determined. The nBuP(C 6H4-m-SO3Na)2 (χ = 12.5, Tol = 153°) showed the highest activity achieving turnover numbers up to 6200 with a yield and selectivity higher than 99% in a solvent, chlorine and promoter free reaction mixture. The catalyst was successfully recycled for six consecutive runs without loss of activity. The characterization of sulfonated and non-sulfonated phosphines indicated that the sulfonation had no significant effect on the steric and electronic properties of the ligands. The Royal Society of Chemistry 2012.
Reduction of phosphine oxides to phosphines with the InBr3/TMDS system
Pehlivan, Leyla,Métay, Estelle,Delbrayelle, Dominique,Mignani, Gérard,Lemaire, Marc
supporting information; experimental part, p. 3151 - 3155 (2012/05/31)
An efficient method for the reduction of phosphine oxide derivatives into their corresponding phosphines is described. The system InBr3/TMDS allows the reduction of different secondary and tertiary phosphine oxides as well as aliphatic and aromatic phosphine oxides.
The Stereochemistry of Organometallic Compounds. XXXVII. Regio- and Stereo-control in the Rhodium-Catalysed Hydroformylation of Some Alkenylphosphines
Jackson, W. Roy,Perlmutter, Patrick,Suh, Guem-Hee,Tasdelen, E. Elizabeth
, p. 951 - 966 (2007/10/02)
Good to excellent regiocontrol can be obtained for the internal product of rhodium-catalysed hydroformylation of a range of alkenylphosphines.Excellent stereo- as well as regio-control can also be obtained for reactions of some cyclic alkenylphosphines.
A Simple Synthesis and Some Synthetic Applications of Substituted Phosphide and Phosphinite Anions
Tsvetkov, E. N.,Bondarenko, N. A.,Malakhova, I. G.,Kabachnik, M. I.
, p. 198 - 208 (2007/10/02)
Based on data for the acidity relationship of phosphines and phosphinous acids and water in dimethyl sulfoxide and water, a simple method is reported for the generation of phosphide and phosphinite anions by the action of concentrated aqueous alkali on primary and secondary phosphines as well as phosphinous acids in dimethyl sulfoxide or other dipolar aprotic solvents.Alkylation of the anion yields secondary and tertiary phosphines, polyphosphines, functionally substituted phosphines as well as similarly substituted phosphine oxides.Phosphinous acids have beenalkylated in various solvents in two-phase systems containing concentrated aqueous alkali and tetrabutylammonium iodide as phase transfer catalyst.
