Tag: M.W:500-600

Electric Literature of 161265-03-8, An article , which mentions 161265-03-8, molecular formula is C39H32OP2. The compound – (9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine) played an important role in people’s production and life.

Certain imidazopyridines (I) and pharmaceutical compositions thereof are provided herein. Methods of treating patients suffering from certain diseases and disorders responsive to the inhibition of Syk activity, which comprises administering to such patients an amount of at least one chemical entity effective to reduce signs or symptoms of the disease or disorder are provided. Also provided are methods for determining the presence or absence of Syk kinase in a sample.

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Related Products of 12150-46-8, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 12150-46-8, C34H28FeP2. A document type is Article, introducing its new discovery.

New silver(I) derivatives containing bidentate phosphine and anionic bis(triazol-1-yl)borate ligands have been prepared from the reaction of AgNO3 and dppm (bis(diphenylphosphino)methane), dppe (1,2-bis(diphenylphosphino)ethane), or dppf (1,1?-bis(diphenylphosphino) ferrocene) and potassium dihydrobis(1,2,4-triazolyl)borate, K[H 2B(tz)2]; their solid state and solution properties have been investigated through analytical and spectroscopic measurements (IR, 1H and 31P NMR). All the compounds are soluble in chlorinated solvents and are non-electrolytes in CH2Cl2 and acetone solutions. [{H2B(tz)2}Ag(dppf)] is simple mononuclear array, the silver atom lying in four-coordinate N 2AgP2 environment. In [{H2B(tz) 2}2Ag3(dppm)2(NO3)], the silver environment is still four-coordinate but PAgN3, utilizing the coordinating capability of one of the additional (‘exo’-) ring nitrogens not only to complete the four-coordinate array about the silver but, necessarily, to link successive asymmetric units into a single-stranded polymer. [{H 2B(tz)2}2Ag3(dppm) 2(NO3)] may be regarded as a hemi-adduct of [{H 2B(tz)2}Ag(dppm)] with silver(I) nitrate, thus [{H 2B(tz)2}Ag(dppm)]: AgNO3 (2:1).

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

166330-10-5, Name is (Oxybis(2,1-phenylene))bis(diphenylphosphine), molecular formula is C36H28OP2, belongs to chiral-phosphine-ligands compound, is a common compound. In a patnet, once mentioned the new application about 166330-10-5, Application In Synthesis of (Oxybis(2,1-phenylene))bis(diphenylphosphine)

A general method is reported for the stereoselective preparation of highly functionalized allylic thioethers. This protocol is based on a Pd-catalyzed thiolation of modular vinyl cyclic carbonate substrates and features high (Z)-selectivity, good yields, minimal waste, ample product scope, and operational simplicity. A one-pot strategy was used for the stereoselective formation of pharma-relevant allylic sulfones derived from their in situ prepared thioether precursors.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Application In Synthesis of (Oxybis(2,1-phenylene))bis(diphenylphosphine). In my other articles, you can also check out more blogs about 166330-10-5

Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 166330-10-5, Name is (Oxybis(2,1-phenylene))bis(diphenylphosphine), molecular formula is C36H28OP2. In a Article，once mentioned of 166330-10-5, SDS of cas: 166330-10-5

With RuHCl(CO)(PPh3)3 as the starting material, the complexes RuHCl(CO)(PPh3)(L) were prepared for L = Xantphos and closely related ligands. Their catalytic activity in the direct amination of cyclohexanol showed large differences depending on the different backbone structures. In those complexes the Xantphos-type ligand backbones are slightly bent and display fluxionality, studied by VT-NMR. This was assigned to the “flipping” of the backbone via the bridging atoms in the xanthene backbone. Via line shape analysis of the peaks, the Gibbs free energy of activation of the flipping movement was found to be around 56 kJ/mol in all cases. However, the activation enthalpy and entropy differed considerably. Employing RuCl2(PPh3)3 as the precursor resulted in the trans-coordinated complexes RuCl2(PPh3)(L) for L = Xantphos, Sixantphos. Fluxionality was no longer observed, due to the fact that in these complexes the O atom in the backbone also coordinates to the Ru.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.SDS of cas: 166330-10-5, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 166330-10-5, in my other articles.

Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Synthetic Route of 166330-10-5. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 166330-10-5, Name is (Oxybis(2,1-phenylene))bis(diphenylphosphine). In a document type is Article, introducing its new discovery.

The preparation of heteroleptic Cu complexes from various 2,9-disubstituted-1,10-phenanthrolines (phen) and different bis-phosphine (PP) ligands was investigated. These heteroleptic complexes are found to be stable in CH2Cl2 solutions and no detectable ligand exchange reactions could be detected. The results also show that the CuI-mediated threading of all the bis-phosphine ligands through the macrocycle is effective. The X-ray crystal structure analysis of BF4 proves the threading of the POP moiety through the macrocyclic phenanthroline ligand. The intramolecular face-to-face p p interaction between one phenyl ring of the POP ligand and the phenanthroline moiety induces a significant rocking of the POP ligand. The results also show that formation of the homoleptic bisphenanthroline Cu complex is prevented by the macrocyclic nature of the phenanthroline ligand.

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

In an article, published in an article, once mentioned the application of 161265-03-8, Name is (9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine),molecular formula is C39H32OP2, is a conventional compound. this article was the specific content is as follows.name: (9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine)

We studied the luminescence properties of copper(i) complexes containing bis[2-(diphenylphosphino)phenyl]ether (DPEphos), [Cu(DPEphos)(CH 3CN)]PF6 (1), [Cu(DPEphos)2]PF6 (2), and copper(i) complexes with 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (xantphos), [Cu(xantphos)(CH3CN)2]PF6 (3), [Cu(xantphos)2]PF6 (4) in the solid state. The metal-free xantphos ligand shows weak phosphorescent emission at around 455 nm with an emission lifetime in the sub-microsecond range in the solid state at room temperature. When xantphos forms complex 4, it results in a nearly 4-fold increase in the emission quantum yield and emission lifetime, with a small shift in the emission maximum. In contrast, no such enhancement in the luminescence or increment in the emission lifetime was observed in complexes 1-3. The X-ray structural analysis of complexes 1-4 reveals a large vacant space in complexes 1-3 and in contrast, close packing of the ligands in complex 4 around the metal center. This indicates that the decrease in the free-space around the metal center results in a decrease in the geometric relaxation, suppressing the excited-state deactivation pathway.

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Application of 12150-46-8. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 12150-46-8, Name is 1,1-Bis(diphenylphosphino)ferrocene. In a document type is Article, introducing its new discovery.

Thermal reaction of [Ru2(CO)6(mu-PFu2)(mu- eta1,eta2-Fu)] (Fu = 2-furyl) (1) with bis(diphenylphosphanyl)methane (dppm), bis(diphenylphosphanyl)amine (dppam), or bis(diphenylphosphanyl)methylamine (dppma), produces the substitution products [Ru2(CO)4(mu-PFu2)(mu-eta1, eta2-Fu)(mu-L)] [2 (L = dppm), 3 (L = dppam), 4 (L = dppma)] in good yields. The Ru-Ru edge is bridged by the diphosphane in each case, while the mu-eta1,eta2-bound furyl fragment remains intact. When the reactions were carried out using bis (diphenylphosphanyl) ethane (dppe) or bis(diphenylphosphanyl)propane (dppp), the compounds [Ru2(CO)5(mu-PFu2)(mu- eta1-C6H4PPh (CH2)nPPh2)] [5 (n = 2), 6 (n = 3)] were isolated as the thermodynamic products in which both P atoms chelate to one Ru centre to afford five-(for 5) and six-membered (for 6) ruthenacycles, accompanied by orthometallation of one of the phenyl rings of the phosphane ligand. Interestingly, elimination of the coordinated furyl moiety occurs during the formation of 5 and 6. Upon reaction with bis (diphenylphosphanyl) butane (dppb), bis(diphenylphosphanyl)pentane (dpppe), or bis(diphenylphosphanyl)ferrocene (dppf), cyclometallation is not favoured in each case. Instead, [{Ru2(CO)5(mu-PFu2) (mu-eta1,eta2-Fu)}2(L)] [7a (L = dppb), 8a (L = dpppe), 9a (L = dppf)] and polymeric [Ru2(CO)4(mu-PFu2) (mu-eta1,eta2-Fu)(L)]n [7b (L = dppb), 8b (L = dpppe), 9b (L = dppf)] were obtained with the product yield depending on the stoichiometry of the reactants. All these new diruthenium complexes are electron-precise with 34 cluster valence electrons. Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002.

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.12150-46-8, Name is 1,1-Bis(diphenylphosphino)ferrocene, molecular formula is C34H28FeP2. In a Article，once mentioned of 12150-46-8, name: 1,1-Bis(diphenylphosphino)ferrocene

The reaction of 4-ferrocenylaniline with trans-[ReOCl3(PPh3)2] gave [(4-ferrocenylphenylimido)]trichlorobis-(triphenylphosphine)rhenium(V) (1). The molecular structure of 1 has been determined by X-ray diffraction. The X-ray crystal structure of [(4-ferrocenylphenylimido)]tribromobis(triphenylphosphine)rhenium(V) (2) has also been determined and its molecular structure is compared with that of 1. The complexes 1 and 2 have also been investigated by cyclic voltammetry and UV-visible spectroscopy. The results of the cyclic voltammetry suggest that there is insignificant electron delocalization from the ferrocenyl group towards rhenium in 1 and 2. However, both 1 and 2 show a long wavelength absorption in their electronic spectra which is characteristic of conjugated ferrocenyl derivatives. The synthesis and characterization of two further similar imido-complexes but in which the ferrocenyl-phenyl group is part of a more extended unit is described (complexes 5 and 6). The synthesis of a rhenium oxo-complex,fac-oxotrichloro[1,1?-bis(diphenylphosphine) ferrocene]rhenium(V) (3) has also been achieved and 3 has been further derivatized with two different ferrocenylamines to provide rhenium complexes containing two ferrocenyl groups (4 and 7).

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

In an article, published in an article, once mentioned the application of 166330-10-5, Name is (Oxybis(2,1-phenylene))bis(diphenylphosphine),molecular formula is C36H28OP2, is a conventional compound. this article was the specific content is as follows.Product Details of 166330-10-5

Reaction of 5,6-diamino-1,10-phenanthroline (dap), chelating diphosphine ligands, 9,9-dimethyl-4,5-bis(diphenylphosphino)-9H-xanthene (xantphos) and bis[(2-diphenylphosphino)phenyl] ether (POP) with [Cu(MeCN)4]ClO4 afforded mononuclear [Cu(dap)(PP)]ClO4 (PP = xantphos, 1a; POP, 2a), binuclear [Cu2(mu-pdi)(PP)2](ClO4)2 (pdi = 1,10-phenanthroline-5,6-diimine) (PP = xantphos, 1b; POP, 2b) and [Cu2(mu-ttpd)(xantphos)2](ClO4)2 (1c) (ttpd = 8b,9,18,18a-tetrahydrotetrapyrido[3,2-a:2?,3?-c:3?,2?-h:2?,3?-j]phenazine-8b,18a-diamine) complexes. The ligand pdi with a quinone diimine form in complexes 1b and 2b is suggested to result from an in-situ two-electron oxidation of dap under the catalysis of Cu(I) and is stabilized by the coordination to Cu(I) ion, while the unprecedented ligand ttpd in complex 1c is suggested to originate from the in-situ oxidation, addition and cyclization reaction of dap induced and stabilized by crystallized Cu(I)-diimine-diphosphine complex. The plausible formation mechanisms for the Cu(I) complexes are proposed.

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Reference of 161265-03-8, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 161265-03-8, Name is (9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine), molecular formula is C39H32OP2. In a Patent，once mentioned of 161265-03-8

The invention relates to a medicine intermediate two thiophene substituted nitrogen-containing fused ring compound synthesis method, the method comprises in the solvent, the catalyst, in the presence of phosphine and alkali, so that the adjacent ammonia methyl acetic acid compound with the halogenated thiophene compounds obtained by reacting said two thiophene substituted nitrogen-containing fused ring compound. The method obtained product has good yield and purity, is the compound of the novel synthesis method. (by machine translation)

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 161265-03-8 is helpful to your research., Reference of 161265-03-8

Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate