Day: April 12, 2022

Wang, Yidong; Zhang, Peichao; Di, Xiaoyu; Dai, Qiang; Zhang, Zhan-Ming; Zhang, Junliang published the article 《Gold-Catalyzed Asymmetric Intramolecular Cyclization of N-Allenamides for the Synthesis of Chiral Tetrahydrocarbolines》. Keywords: gold catalyzed asym intramol cyclization allenamide chiral hydrocarboline synthesis; chiral sulfinamide phosphine ligand gold catalyzed asym intramol cyclization; desbromoarborescidine A synthesis desbromoarborescidine C formal synthesis; deplancheine formal synthesis; desymmetrization allenamide; allenamides; cyclization; enantioselectivity; gold; tetrahydrocarboline.They researched the compound: (R)-N-((R)-(5-(Diphenylphosphanyl)-9,9-dimethyl-9H-xanthen-4-yl)(4-methoxyphenyl)methyl)-2-methylpropane-2-sulfinamide( cas:2160535-56-6 ).Application In Synthesis of (R)-N-((R)-(5-(Diphenylphosphanyl)-9,9-dimethyl-9H-xanthen-4-yl)(4-methoxyphenyl)methyl)-2-methylpropane-2-sulfinamide. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:2160535-56-6) here.

Highly enantioselective gold-catalyzed intramol. cyclization of N-allenamides was implemented by utilizing a designed chiral sulfinamide phosphine ligand (PC-Phos) [e.g., allenamide I → tetrahydrocarboline II (99%, 96% ee) in presence of Me2S.AuCl, AgNTf2 and ligand III in CH2Cl2 at -50°]. This represents the first example of highly enantioselective intramol. cyclization of N-allenamides. The practicality of this reaction was validated in the total synthesis of (R)-desbromoarborescidine A and formal synthesis of (R)-desbromoarborescidine C and (R)-deplancheine. Moreover, the catalyst system PC-Phos/AuNTf2 proved to be specifically efficient to promote the desymmetrization of N-allenamides in excellent yields with satisfactory ee values.

There are many compounds similar to this compound(2160535-56-6)Application In Synthesis of (R)-N-((R)-(5-(Diphenylphosphanyl)-9,9-dimethyl-9H-xanthen-4-yl)(4-methoxyphenyl)methyl)-2-methylpropane-2-sulfinamide. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 1762-34-1, is researched, Molecular C12H12N2, about Construction of lanthanide complexes supported by 2,3-dimethoxybenzoic acid and 5,5′-dimethyl-2,2′-bipyridine: crystal structures, thermoanalysis, magnetic and fluorescence properties, the main research direction is lanthanide dimethoxybenzoate dimethybipyridine complex preparation crystal mol structure; thermoanalysis magnetic fluorescence property lanthanide dimethoxybenzoate dimethybipyridine complex.Recommanded Product: 1762-34-1.

A series of novel trivalent lanthanide complexes, [Ln(2,3-DMOBA)3(5,5′-DM-2,2′-bipy)]2·C2H5OH (Ln = Eu (1), Sm (2), Gd (3), Ho (4) Er (5), Pr (6), Nd (7)) (2,3-DMOBA = 2,3-dimethoxybenzoate, 5,5′-DM-2,2′-bipy = 5,5′-dimethyl-2,2′-bipyridine), have been successfully synthesized and structurally validated by single crystal diffraction. All complexes discussed herein feature a binuclear structure, and contain only one free ethanol mol., which is interesting in the lanthanide complexes. The coordination number of center Ln3+ ions is nine, showing a distorted monocapped square anti-prismatic coordination geometry. Through a pair of alternating identical C-H···O hydrogen bonding interactions between two 2,3-DMOBA ligands on the same lanthanum binuclear unit with 5,5′-DM-2,2′-bipy ligands on two neighboring units, the binuclear complexes can form one- The thermal anal. of these complexes are investigated by TG-DSC/FTIR, the result show that the decomposition process of complexes are mainly divided into four stages with the formation of the resp. oxides. The visible light emission experiment of complex 1 is carried out, and the characteristic luminescence behavior of intense red light is exhibited. What’more, fluorescence lifetimes as well as the fluorescent quantum yield of complex 1 is calculated And the magnetic properties of complexes 3-5 are also studied.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Related Products of 1762-34-1. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about A sensitive photoluminescent chemosensor for cyanide in water based on a zinc coordination polymer bearing ditert-butyl-bipyridine.

Sensitive and direct sensing of cyanide in buffered aqueous solutions at pH = 7.0 by three new blue photoluminescent zinc-1,4-cyclohexanedicarboxylato coordination polymers bearing di-alkyl-2,2′-bipyridines has been achieved. Specifically, a Zn-polymer with the general formula: {[Zn2(H2O)2(e,a-cis-1,4-chdc)2(4,4′-dtbb)2]·7H2O}n, (1,4-chdc = 1,4-cyclohexanedicarboxylato and 4,4′-dtbb = 4,4′-ditert-butyl-2,2′-bipyridine) has been synthesized in high yield and studied as a luminescent chemosensor for halides, pseudohalides and a series of oxyanions in neutral water. CN- ions can be quant. detected by this polymer based on complete quenching (λem = 434 nm) in the sub-micromolar concentration range with a pronounced selectivity over common anions such as acetate, bromide and iodide. The quenching response (KSV = 9.7(±0.2) × 104 M-1) by the addition of CN- was also observed in the presence of typical interfering anions with a very low detection limit of 0.9μmol L-1 in buffered water at pH = 7.0. On the basis of the crystal structure and solid state CPMAS 13C-NMR correlation and 1H NMR, IR-ATR, MS-ESI(+) and SEM-EDS experiments, the optical change is attributed to the efficient release of its corresponding ditert-butyl-bipyridine, with the simultaneous formation of a zinc cyanide complex. The CPMAS 13C-NMR spectrum of the coordination polymer is consistent with the symmetry of the crystal structure. The use of flexible coordination polymers as fluorescent sensors for fast and selective detection of cyanide ions in pure aqueous solutions has been unexplored until now.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Application of 1762-34-1. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about Spectroscopic, structural and DFT studies of luminescent Pt(II) and Ag(I) complexes with an asymmetric 2,2′-bipyridine chelating ligand. Author is Yilmaz, Ismail; Acar-Selcuki, Nursel; Coles, Simon J.; Pekdemir, Fatih; Sengul, Abdurrahman.

A new unsym. substituted 2,2′-bipyridine ligand, 5-methyl-5′-carbomethoxy-2,2′-bipyridine (L) was isolated from the dry distillation of the copper(II) complex, mono-aqua-bis(trans-5-methyl-pyridine-2-carboxylato-N,O)copper(II). The ligand was fully characterized. The spectroscopic and single-crystal x-ray diffraction (SCXRD) studies of the coordination compounds of the ligand with platinum(II) and silver(I); cis-Pt(L)Cl2 (1) and [Ag(L)2]PF6 (2), resp. are reported. In 1, the Pt center coordinates to tertiary N atoms of the ligand and two chloride ions to form a neutral square-planar coordination sphere, while in 2, the Ag(I) center is coordinated by two ligands through N atoms to generate a cationic flattened tetrahedron geometry in which two mean planes intersect each other at 50.93°. The pyridine rings are nearly coplanar as revealed by the torsion angle of N2-C7-C6-N1 1.32(5)°. In both complexes, L acts as a chelating ligand through pyridyl N atoms. In 1, the mol. units are stacked in a head-to-tail fashion with a Pt···Pt separation of 3.5 Å. Supramol. self-assembly of the mol. units by extensive intermol. contacts through C-H···Cl and C-H···O between the adjacent units results in an infinite two-dimensional flattened-out herringbone structure in the crystalline state. In 2, the mol. units are interconnected with each other by C-H···O contacts between the adjacent units running parallel to each other. Both complexes are fluorescent in solution and have emission maxima in the UV-Vis regions, which is a very important property for optoelectronic applications. DFT (d. functional theory) and TD-DFT (time-dependent-DFT) calculations were performed at B3LYP/6-311+G(d,p)/LANL2DZ level to explore structural, electronic, and spectroscopic properties to compare with the exptl. results. The MOs were carried out with DFT at the same level.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about Group 6 Metal Complexes as Electrocatalysts of CO2 Reduction: Strong Substituent Control of the Reduction Path of [Mo(η3-allyl)(CO)2(x,x’-dimethyl-2,2′-bipyridine)(NCS)] (x = 4-6).Recommanded Product: 5,5′-Dimethyl-2,2′-bipyridine.

[Mo(η3-allyl)(CO)2(x,x’-dmbipy)(NCS)] (dmbipy = dimethyl-2,2′-bipyridine; x = 4-6) were synthesized and their electrochem. reduction studied using combined cyclic voltammetry (CV) and variable-temperature spectroelectrochem. (IR/UV-visible SEC) in THF and butyronitrile (PrCN), at Au and Pt electrodes. The exptl. results, strongly supported by d. functional theory (DFT) calculations, indicate that the general cathodic path of these Group 6 organometallic complexes is closely related to that of the intensively studied class of Mn tricarbonyl α-diimine complexes, which, themselves, have recently been identified as important smart materials for catalytic CO2 reduction The di-Me substitution on the 2,2′-bipyridine ligand backbone has presented new insights into this emerging class of catalysts. For the 1st time, the 2e- reduced 5-coordinate anions [Mo(η3-allyl)(CO)2(x,x’-dmbipy)]- were directly observed with IR spectroelectrochem. (IR SEC). The role of steric and electronic effects in determining the reduction-induced reactivity was also studied. For the 6,6′-dmbipy, the primary 1e- reduced radical anions exert unusual stability, radically changing the follow-up cathodic path. The 5-coordinate anion [Mo(η3-allyl)(CO)2(6,6′-dmbipy)]- remains stable at low temperature in strongly coordinating butyronitrile and does not undergo dimerization at elevated temperature, in sharp contrast to reactive [Mo(η3-allyl)(CO)2(4,4′-dmbipy)]- that tends to dimerize in a reaction with the parent complex. The complex with the 5,5′-dmbipy ligand combines both types of reactivity. Under aprotic conditions, the different properties of [Mo(η3-allyl)(CO)2(x,x’-dmbipy)]- are also reflected in their reactivity toward CO2. Preliminary CV and IR SEC results reveal differences in the strength of CO2 coordination at the free axial position. Catalytic waves attributed to the generation of the 5-coordinate anions were observed using CV, but only a modest catalytic performance toward the production of formate was demonstrated by IR SEC. For 6,6′-dmbipy, a stronger catalytic effect was observed for the Au cathode, compared to Pt.

I hope my short article helps more people learn about this compound(5,5′-Dimethyl-2,2′-bipyridine)Recommanded Product: 5,5′-Dimethyl-2,2′-bipyridine. Apart from the compound(1762-34-1), you can read my other articles to know other related compounds.

Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Dey, Nilanjan; Bhattacharjee, Subham; Bhattacharya, Santanu published an article about the compound: 5,5′-Dimethyl-2,2′-bipyridine( cas:1762-34-1,SMILESS:CC1=CN=C(C=C1)C1=NC=C(C)C=C1 ).HPLC of Formula: 1762-34-1. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:1762-34-1) through the article.

Multiresponsive smart optical probe based on p-phenylene vinylene backbone is designed for simultaneous sensing of multiple ions, such as Cu2+, Zn2+ and F- at pH 7.4. A rapid color change from colorless to deep yellow is observed upon addition of both Cu2+ and Zn2+ ion. However, under long UV lamp, the green-colored emission of the probe is specifically quenched in the presence of Cu2+, while Zn2+ induces change in the emission color from green to yellow. On the contrary, F-, unlike Cu2+ and Zn2+, does not render any change in visible color, however, an emission quenching, similar to that of Cu2+ addition, was noticed. The binding of metal ions to the central bipyridine core diminishes the ′conformational flexibility′ and facilitates ′ligand to metal ion′ charge transfer. On the contrary, addition of fluoride triggers the cleavage of silyl ether groups and results in the photo-induced electron transfer from free hydroxyl groups to the core aromatic unit. Thus, we can detect as well as discriminate these three ions (Cu2+, Zn2+ and F-) simultaneously by comparing the resp. output signals. Further, a sustainable strategy has been developed for on-site detection of toxic ions using reusable, low-cost paper strips.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

HPLC of Formula: 1762-34-1. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about Regulation of Substituent Effects on Configurations and Magnetic Performances of Mononuclear DyIII Single-Molecule Magnets. Author is Zhang, Sheng; Mo, Wenjiao; Zhang, Jiangwei; Zhang, Zengqi; Yin, Bing; Hu, Dengwei; Chen, Sanping.

A series of mononuclear DyIII compounds, [Dy(tmpd)3(4,4′-dmpy)] (1), [Dy(tffb)3(4,4′-dmpy)] (2), [Dy(tffb)3(5,5′-dmpy)] (3), and [Dy(tmpd)3(5,5′-dmpy)] () [tmpd = 4,4,4-trifluoro-1-(4-methoxyphenyl)-1,3-butanedione, tffb = 4,4,4-trifluoro-1-(4-fluorophenyl)-1,3-butanedione, 4,4′-dmpy = 4,4′-dimethyl-2,2′-bipyridyl, and 5,5′-dmpy = 5,5′-dimethyl-2,2′-bipyridyl], have been synthesized by modifying β-diketonate ligands and capping N-donor co-ligands. DyIII ions in 1-4 possess N2O6 octacoordinated environments. Compounds 1 and 2 exhibit distorted trigonal dodecahedron configurations, while 3 and 4 display distorted square antiprismatic configurations. Systematic investigations of the a.c. measurements indicate the different magnetic relaxation dynamics with energy barriers (Ueff) of 66 K (1, 45 cm-1), 189 K, (2, 131 cm-1), 115 K (3, 79 cm-1), and 205 K (4, 142 cm-1). To deeply understand their different magnetic behaviors, the magnetic anisotropies of 1-4 were studied by ab initio calculations From ab initio calculations, the energies of the first excited state (KD1) are consistent with the exptl. Ueff under zero d.c. field. Compound 4 presents the largest Ueff because of the smallest gX,Y and μqTM as well as the most strong axial crystal field parameters (CFPs) among compounds 1-4. The M vs. H data exhibit butterfly-shaped hysteresis loops at 2 K for 1-4. The different coordination geometries, the magnetic dynamics, the electrostatic repulsion, and CFPs result from the different substituent effects of ligands, including the electronic effect, the steric effect, and the positions of substituted groups. The different coordination geometries, the magnetic dynamics, the electrostatic repulsion, and the crystal field parameters result from the different substituent effects of ligands, including the electronic effect, the steric effect, and the positions of substituted groups.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Asahara, Masahiro; Kurimoto, Haruhiko; Nakamizu, Masato; Hattori, Shingo; Shinozaki, Kazuteru published the article 《H/D solvent isotope effects on the photoracemization reaction of enantiomeric the tris(2,2′-bipyridine)ruthenium(II) complex and its analogues》. Keywords: preparation ruthenium bipyridine phenanthroline complex; solvent isotope effect ruthenium bipyridine phenanthroline complex; photoracemization reaction ruthenium bipyridine phenanthroline complex.They researched the compound: 5,5′-Dimethyl-2,2′-bipyridine( cas:1762-34-1 ).Safety of 5,5′-Dimethyl-2,2′-bipyridine. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1762-34-1) here.

This work assessed solvent isotope effects on the photoracemization rate and emission lifetime for [Ru(bpy)3]2+ (bpy = 2,2′-bipyridine) in water. An anal. of the effects of temperature on photoracemization rate and emission lifetime demonstrated that the transition from one enantiomer to the other is unaffected by the isotopic composition of the solvent. Also deactivation from the metal-to-ligand charge-transfer (3MLCT) excited state to the ground state is responsible for the solvent isotope effect on the photoracemization rate. The photoracemization reaction proceeds via a bond-breaking mechanism. In this process, a five-coordinated species produced through breaking of the Ru-N bond in the 3d-d* state undergoes a structural change to produce an achiral five-coordinated species. An anal. of the effect of temperature on emission lifetime, excluding the activation to the 3d-d* state that leads to the structural change, showed that the solvent isotopic composition affects deactivation from the 4th MLCT state.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about Thermodynamics of the Adsorption of Isomeric Dipyridyls and Their Derivatives from Water-Organic Solutions on HYPERCARB Porous Graphitic Carbon, the main research direction is dipyridyls water acetonitrile methanol isopropanol porous graphitic carbon adsorption.HPLC of Formula: 1762-34-1.

High-performance liquid chromatog. is used under near-equilibrium conditions to study the adsorption of isomeric dipyridyls and their derivatives from water-acetonitrile, water-methanol, and water-isopropanol solutions onto Hypercarb graphite-like carbon material in the region of Henry’s law. It is shown that the possibility of forming strong intramol. C-H-N’-hydrogen bonds in a mol. of 2,2′-dipyridyl or its derivatives strengthens the adsorption bonding of adsorbate mols. and the surface of the graphite-like material due to stabilization of their planar conformation. Destabilizing this intramol. hydrogen bond by adding substituents in different positions of the pyridine rings enhances the specific intermol. interaction between adsorbate mols. and the solvent’s components and distorts the planar conformation of dipyridyls, weakening their retention on the Hypercarb material. Pos. adsorption from the water-organic medium on the carbon adsorbent is observed for all of the investigated dipyridyls, with the exception of 2,2′-dipyridyl-N,N’-dioxide, which is adsorbed weaker than the solvent components. Anomalous medium-property dependences are found for the thermodn. characteristics of the adsorption of dipyridyls on porous graphitic carbon, and are attributed to the predominance of adsorbate-adsorbent π-π interactions over hydrophobic ones and the resolvation of adsorbate mols. with acetonitrile in proportion to lowering the content of water in the bulk solution

I hope my short article helps more people learn about this compound(5,5′-Dimethyl-2,2′-bipyridine)HPLC of Formula: 1762-34-1. Apart from the compound(1762-34-1), you can read my other articles to know other related compounds.

Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about Cerium-Based Metal-Organic Layers Catalyze Hydrogen Evolution Reaction through Dual Photoexcitation, the main research direction is metal organic layer photocatalyst hydrogen evolution photosensitizer ligand.Recommanded Product: 5,5′-Dimethyl-2,2′-bipyridine.

Cerium-based materials such as ceria are increasingly used in catalytic reactions. We report here the synthesis of the first Ce-based metal-organic layer (MOL), Ce6-BTB, comprising Ce6 secondary building units (SBUs) and 1,3,5-benzenetribenzoate (BTB) linkers, and its functionalization for photocatalytic hydrogen evolution reaction (HER). Ce6-BTB was postsynthetically modified with photosensitizing [(MBA)Ir(ppy)2]Cl or [(MBA)Ru(bpy)2]Cl2 (MBA = 2-(5′-methyl-[2,2′-bipyridin]-5-yl)acetate, ppy = 2-phenylpyridine, bpy = 2,2′-bipyridine) to afford Ce6-BTB-Ir or Ce6-BTB-Ru MOLs, resp. The proximity of photosensitizing ligands and Ce6 SBUs in the MOLs facilitates electron transfer to drive photocatalytic HER under visible light with turnover numbers of 1357 and 484 for Ce6-BTB-Ir and Ce6-BTB-Ru, resp. Photophys. and electrochem. studies revealed a novel dual photoexcitation pathway whereby the excited photosensitizers in the MOL are reductively quenched and then transfer electrons to Ce6 SBUs to generate CeIII centers, which are further photoexcited to CeIII* species for HER.

I hope my short article helps more people learn about this compound(5,5′-Dimethyl-2,2′-bipyridine)Recommanded Product: 5,5′-Dimethyl-2,2′-bipyridine. Apart from the compound(1762-34-1), you can read my other articles to know other related compounds.

Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem