20202-62-4Relevant academic research and scientific papers
Improving the performance of palladium-catalysed telomerization of 1,3-butadiene by metallocene-based phosphine ligand
Dong, Kaiwu,Shen, Chaoren,Tian, Xinxin,Xu, Zhengshuai,Zhang, Hongru
, (2021/09/24)
By replacing one planar phenyl group of PPh3 with bulkier ferrocenyl or ruthenocenyl group, the performance of resulted metallocene-based phosphine ligand in the telomerization of 1,3-butadiene with methanol has been largely elevated compared t
Cationic palladium(II)–acetylacetonate complexes containing phosphine and aminophosphine ligands and their catalytic activities in telomerization of 1,3-butadiene with methanol
Abramov, Z. D.,Borodina, T. N.,Bykov, M. V.,Ratovskii, G. V.,Smirnov, V. I.,Suslov, D. S.,Tkach, V. S.,Ushakov, I. A.
, (2020/07/27)
The Pd(II) complexes [Pd(acac)(L)n]BF4 were synthesized by the reaction of [Pd(acac)(MeCN)2]BF4 with L (n = 2: L = PCyPh2, PCy2Ph, P(NMe2)3, P(NEt2)3, tri-2
Zwitterionic phosphonium ligands: Synthesis, characterization and application in telomerization of 1,3-butadiene
Pews-Davtyan,Jackstell,Spannenberg,Beller
supporting information, p. 7568 - 7571 (2016/07/06)
Novel zwitterionic phosphonium alkylsulfonate ligands are chemoselectively synthesized from N-heterocyclic phosphines and cyclic sulfones in one step in good to excellent yields. Their in situ generated palladium complexes showed high productivity in the
Comparison between phosphine and NHC-modified Pd catalysts in the telomerization of butadiene with methanol - A kinetic study combined with model-based experimental analysis
V?lkl, Lisa,Recker, Sebastian,Niedermaier, Matthias,Kiermaier, Stephan,Strobel, Vinzent,Maschmeyer, Dietrich,Cole-Hamilton, David,Marquardt, Wolfgang,Wasserscheid, Peter,Haumann, Marco
, p. 547 - 559 (2015/08/06)
The telomerization of butadiene with methanol was investigated in the presence of different palladium catalysts modified either with triphenylphosphine (TPP) or 1,3-dimesityl-imidazol-2-ylidene (IMes) ligand. When pure butadiene was used as substrate, a m
PROCESS FOR TELOMERIZATION OF BUTADIENE USING A MONO-ORTHOALKOXY SUBSTITUTED CATALYST
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Page/Page column 14-16, (2012/07/13)
A process for the telomerization of butadiene comprises reacting 1,3-butadiene and an alkanol, in the presence of a catalyst promoter and an alkoxydimerization catalyst comprising a Group VIII transition metal and a triarylphosphine ligand, which includes one phenyl that is mono-ortho-alkoxy substituted and at least one other phenyl including at least one substituent that withdraws electrons from the phosphorus atom. The product includes an alkoxy-substituted octadiene, which may then be used to produce 1-octene. The catalyst shows improved stability, activity and selectivity toward the alkoxy-substituted octadiene.
Telomerisation of buta-1,3-diene and methanol: Superiority of chromanyl-type phosphines in the dow process for the industrial production of 1-MOD
Tschan, Mathieu J.-L.,Launay, Helene,Hagen, Henk,Benet-Buchholz, Jordi,Van Leeuwen, Piet W.N.M.
experimental part, p. 8922 - 8928 (2011/09/16)
Butadiene and methanol were telomerised in the presence of palladium catalysts with ligands containing 8-diphenylphosphinochromane-like substituents at phosphorus. MonoXantphos and monoSPANphos afforded the most active, stable and selective catalysts known to date under commercially relevant production conditions for 1-methoxyocta-2,7-diene, the precursor to oct-1-ene.
Efficient bulky phosphines for the selective telomerization of 1,3-butadiene with methanol
Tschan, Mathieu J.-L.,Garcia-Suarez, Eduardo J.,Freixa, Zoraida,Launay, Helene,Hagen, Henk,Benet-Buchholz, Jordi,Van Leeuwen, Piet W.N.M.
experimental part, p. 6463 - 6473 (2010/07/04)
A series of bulky phosphines containing substituted biphenyl, 2-methylnaphthyl, or 2,7-di-tert-butyl-9,9-dimethylxanthene moiety were prepared. They were used in the preparation of new monophosphine-palladium(0)- dvds complexes, which were employed as catalysts for the selective telomerization of 1,3-butadiene with methanol to obtain 1-methoxyocta-2,7-diene (1-MOD), the key intermediate in the Dow 1-octene process. Several ligands showed improved selectivity and yield compared to that of the benchmark ligand PPh3. Especially 2,7-di-tert-butyl-9,9-dimethylxanthen-4-yl- diphenylphosphine (4, mono-xantphos ) stands out as an excellent ligand in terms of yield, selectivity, and stability.
METHOD FOR PRODUCING ETHERS
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Page/Page column 15, (2008/06/13)
Disclosed is a method for producing ethers which is characterized in that a telomerization reaction of a conjugated diene compound in the presence of a hydroxyl compound represented by the following general formula (I): R1OH, is firstly perf
Imidazolium salts and the use of these ionic liquids as a solvent and as a catalyst
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Example 1, (2008/06/13)
New 1,2,3- or 1,2,3,4- or 1,2,3,4,5- substituted imidazolium salts and their uses as solvent in catalyzed organic reactions, as well as compositions containing them and a transition metal compound. They can be used in the following reactions : the telomerisation of conjugated dienes, the dimerisation of olefins, the oligomerisation of olefins, the polymerization of olefins, the alkylation of olefins, the hydrogenation of olefins, the olefin metathesis, the hydroformylation of olefins, the ring-closing metathesis of olefins, the ring-opening metathesis polymerisation of olefins, the symetric or asymetric epoxidation of olefins (including heteroatom substituted olefins) and the cyclopropanation of olefins, the condensation reaction, the hydrogenation reaction, the isomerization reaction, the Suzuki cross-coupling reactions, the amination reaction, the partial oxidation of alkancs, the kinetic resolution of racemic mixtures, the hydrogenation of imines, the hydrogenation of ketones, the transfer hydrogenation and the hydroxylation of aromatic organic compounds.
Process of telomerizing conjugated dienes
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Page 17-18, (2008/06/13)
The present invention is related to a process for telomerizing a conjugated diene which comprises reacting said conjugated diene with a compound containing active hydrogen in the presence of a catalyst system comprising at least one transition metal compound, at least one phosphorus-containing compound, and at least one salt which forms a liquid under the conditions of the telomerization process.
