Tag: M.W:500-600

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.SDS of cas: 161265-03-8

Catalytic Enantioselective Synthesis of Cyclobutenes from Alkynes and Alkenyl Derivatives

Discovery of enantioselective catalytic reactions for the preparation of chiral compounds from readily available precursors, using scalable and environmentally benign chemistry, can greatly impact their design, synthesis, and eventually manufacture on scale. Functionalized cyclobutanes and cyclobutenes are important structural motifs seen in many bioactive natural products and pharmaceutically relevant small molecules. They are also useful precursors for other classes of organic compounds such as other cycloalkane derivatives, heterocyclic compounds, stereodefined 1,3-dienes, and ligands for catalytic asymmetric synthesis. The simplest approach to make cyclobutenes is through an enantioselective [2 + 2]-cycloaddition between an alkyne and an alkenyl derivative, a reaction which has a long history. Yet known reactions of this class that give acceptable enantioselectivities are of very narrow scope and are strictly limited to activated alkynes and highly reactive alkenes. Here, we disclose a broadly applicable enantioselective [2 + 2]-cycloaddition between wide variety of alkynes and alkenyl derivatives, two of the most abundant classes of organic precursors. The key cycloaddition reaction employs catalysts derived from readily synthesized ligands and an earth-abundant metal, cobalt. Over 50 different cyclobutenes with enantioselectivities in the range of 86-97% ee are documented. With the diverse functional groups present in these compounds, further diastereoselective transformations are easily envisaged for synthesis of highly functionalized cyclobutanes and cyclobutenes. Some of the novel observations made during these studies including a key role of a cationic Co(I)-intermediate, ligand and counterion effects on the reactions, can be expected to have broad implications in homogeneous catalysis beyond the highly valuable synthetic intermediates that are accessible by this route.

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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

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, Recommanded Product: 166330-10-5

Luminescent copper(i) complexes with bisphosphane and halogen-substituted 2,2?-bipyridine ligands

Heteroleptic [Cu(P?P)(N?N)][PF6] complexes, where N?N is a halo-substituted 2,2?-bipyridine (bpy) and P?P is either bis(2-(diphenylphosphino)phenyl)ether (POP) or 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (xantphos) have been synthesized and investigated. To stabilize the tetrahedral geometry of the copper(i) complexes, the steric demands of the bpy ligands have been increased by introducing 6- or 6,6?-halo-substituents in 6,6?-dichloro-2,2?-bipyridine (6,6?-Cl2bpy), 6-bromo-2,2?-bipyridine (6-Brbpy) and 6,6?-dibromo-2,2?-bipyridine (6,6?-Br2bpy). The solid-state structures of [Cu(POP)(6,6?-Cl2bpy)][PF6], [Cu(xantphos)(6,6?-Cl2bpy)][PF6]·CH2Cl2, [Cu(POP)(6-Brbpy)][PF6] and [Cu(xantphos)(6-Brbpy)][PF6]·0.7Et2O obtained from single crystal X-ray diffraction are described including the pressure dependence of the structure of [Cu(POP)(6-Brbpy)][PF6]. The copper(i) complexes with either POP or xantphos and 6,6?-Cl2bpy, 6-Brbpy and 6,6?-Br2bpy are orange-to-red emitters in solution and yellow-to-orange emitters in the solid state, and their electrochemical and photophysical properties have been evaluated with the help of density functional theory (DFT) calculations. The emission properties are strongly influenced by the substitution pattern that largely affects the geometry of the emitting triplet state. [Cu(POP)(6,6?-Cl2bpy)][PF6] and [Cu(xantphos)(6,6?-Cl2bpy)][PF6] show photoluminescence quantum yields of 15 and 17%, respectively, in the solid state, and these compounds were tested as luminophores in light-emitting electrochemical cells (LECs). The devices exhibit orange electroluminescence and very short turn-on times (<5 to 12 s). Maximum luminance values of 121 and 259 cd m-2 for [Cu(POP)(6,6?-Cl2bpy)][PF6] and [Cu(xantphos)(6,6?-Cl2bpy)][PF6], respectively, were achieved at an average current density of 100 A m-2. External quantum efficiencies of 1.2% were recorded for both complexes. Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Recommanded Product: 166330-10-5. 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

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 166330-10-5, Name is (Oxybis(2,1-phenylene))bis(diphenylphosphine), Application In Synthesis of (Oxybis(2,1-phenylene))bis(diphenylphosphine).

Inspiration from old molecules: Field-induced slow magnetic relaxation in three air-stable tetrahedral cobalt(ii) compounds

We have investigated the dynamics of the magnetization of three four-coordinate mononuclear cobalt(ii) compounds, which are synthesized conveniently and are air stable. Slow magnetic relaxation effects were observed for the compounds in the presence of a dc magnetic field. The Royal Society of Chemistry 2013.

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

Related Products 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 Patent, introducing its new discovery.

A sky blue phosphorescent four complex nitrogen heterocyclic carbene monovalent copper complex and its preparation method (by machine translation)

The invention discloses a sky blue phosphorescent four complex nitrogen heterocyclic carbene monovalent copper complex and its preparation method, phosphorescent complexes of the present invention P – 1 by the copper powder with the ligand complex obtained directly, this material has a simple process, the apparatus is simple, the raw materials and low cost. (by machine translation)

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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.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, Computed Properties of C39H32OP2

Provided is a compound having a superior FLAP inhibitory action and useful as a prophylactic or therapeutic agent for arteriosclerosis and the like, and a salt thereof. The present invention relates to a compound represented by the formula wherein each symbol is as defined in the present DESCRIPTION, or a salt thereof.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Computed Properties of C39H32OP2, you can also check out more blogs about161265-03-8

Reference£º
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.166330-10-5, Name is (Oxybis(2,1-phenylene))bis(diphenylphosphine), molecular formula is C36H28OP2. In a Article£¬once mentioned of 166330-10-5, Recommanded Product: (Oxybis(2,1-phenylene))bis(diphenylphosphine)

A series of mononuclear Cu(I)-halide complexes, [CuX(PPh3)2(L)] (X=Cl-, Br-, I-; PPh3Combining double low linetriphenylphosphine; LCombining double low linepyridine (py), isoquinoline (iq), 1,6-naphthyridine (nap)), were synthesized. The emission color of [CuX(PPh3)2(L)] varies from blue to red by changing the L ligands and the halide ions, and all the complexes exhibit high emission quantum yields (0.16-0.99) in the crystals. The emission studies revealed that the emissive states of [CuX(PPh3)2(L)] differ depending on the L ligand. Complexes [CuX(PPh3)2(py)] and [CuX(PPh3)2(nap)] mainly emit from the singlet metal-to-ligand charge transfer mixed with the halide-to-ligand charge transfer (1(M+X)LCT) state at room temperature. In contrast, emissions from [CuX(PPh3)2(iq)] at room temperature originate from both 3(M+X)LCT and 3 pi pi?states. These results indicate that N-heteroaromatic ligands play an important role in the emission properties of mononuclear Cu(I)-halide complexes.

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Reference£º
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 161265-03-8. Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 161265-03-8, Name is (9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine). In a document type is Article, introducing its new discovery.

Reaction of a diphosphane with a chlorophosphane in the presence of SnCl2 or AlCl3 leads to the formation of dicationic heterocycles with three (3P) or four (4P) linked phosphorus atoms. Some 3P derivatives with small alkyl substituents may also be prepared by direct alkylation of cyclic triphosphenium ions. Several new species were prepared in solution, some of which were isolated and characterised by single-crystal X-ray diffraction. Investigations into the factors favouring formation of 3P or 4P species are described.

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Reference£º
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

12150-46-8, Name is 1,1-Bis(diphenylphosphino)ferrocene, molecular formula is C34H28FeP2, belongs to chiral-phosphine-ligands compound, is a common compound. In a patnet, once mentioned the new application about 12150-46-8, Recommanded Product: 1,1-Bis(diphenylphosphino)ferrocene

Abstract: Reaction of Na2[PdCl4] with two equivalents of 4,5-benzo-3H-1,2-dithiole-3-thione (btt) affords cis-[PdCl2(kappa1-btt)2] (1), which provides a convenient entry into mixed-ligand btt complexes. Addition of one equivalent of a range of diamines or diphosphines gives the salts [Pd(kappa1-btt)2(kappa2-diamine)]Cl2 (2a?d) (diamine = en, dap, bipy, phen) and [Pd(btt)2(kappa2-diphosphine)]Cl2 (3a?c) (diphosphine = dppe, dppp, dppf) in good yields. In contrast, two equivalents of dppm result in [Pd(kappa1-btt)2(kappa1-dppm)2]Cl2 (4), where the diphosphine binds in a monodentate fashion. Two equivalents of PPh3 result in a mixture of cis- and trans-isomers of [Pd(kappa1-btt)2(PPh3)2]Cl2 (5a?b) (ca. 1:5 ratio); the pure trans-isomer 5b was isolated by ion-exchange chromatography. The cis-isomer 5a could be synthesized independently from the reaction of cis-[PdCl2(PPh3)2] with two equivalents of btt. In all of these complexes, the btt ligand binds in a monodentate manner through the exocyclic thione sulfur. The anti-tumor activities of representative examples, cis-[PdCl2(kappa1-btt)2] (1), cis-[Pd(kappa1-btt)2(kappa1-dppm)2]Cl2 (4) and cis-[Pd(kappa1-btt)2(PPh3)2] (5a), were evaluated by cell proliferation assays and phase-contrast microscopy against prostate cancer cell lines PC3, DU145 and LNCaP, with complexes 1 and 4 showing potent anti-proliferative effects (TGI values of 19.2 and 21.1?mug/mL, respectively) against LnCaP cells. Graphical abstract: [Figure not available: see fulltext.].

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Recommanded Product: 1,1-Bis(diphenylphosphino)ferrocene. In my other articles, you can also check out more blogs about 12150-46-8

Reference£º
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 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.

New complexes of palladium chloride with bidentate diphosphine ligands on the basis of 2,2?-bis(diorganylphosphino)diphenyl oxides were prepared by three methods, and their catalytic activity in arylation of amines was studied. 2005 Pleiades Publishing, Inc.

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Reference£º
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, Recommanded Product: 12150-46-8

A range of ruthenium-arene compounds with chloride, bromide or iodide ligands were prepared and tested as catalysts for the homogeneous redox neutral alkylation of tert-butylamine with phenethyl alcohol, and compared to the previously reported catalyst [RuCl2(p-cymene)]2, in the presence of the diphosphine 1,1?-bis(diphenylphosphino)ferrocene (dppf). The best catalytic activities were obtained with ruthenium iodide compounds. The formation of either [RuX(p-cymene)(dppf)][X] or [(RuX2(p-cymene)) 2(dppf)] (X = halide) under the catalytic conditions employed was investigated. Copyright

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Recommanded Product: 12150-46-8, you can also check out more blogs about12150-46-8

Reference£º
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