Tag: M.W=350-400

Dai, Xi-Jie published the artcileEn Route to a Practical Primary Alcohol Deoxygenation, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, the publication is Journal of the American Chemical Society (2016), 138(16), 5433-5440, database is CAplus and MEDLINE.

A long-standing scientific challenge in the field of alc. deoxygenation has been direct catalytic sp³ C-O defunctionalization with high selectivity and efficiency, in the presence of other functionalities, such as free hydroxyl groups and amines widely present in biol. mols. Previously, the selectivity issue had been only addressed by classic multistep deoxygenation strategies with stoichiometric reagents. Herein, we propose a catalytic late-transition-metal-catalyzed redox design, on the basis of dehydrogenation/Wolff-Kishner (WK) reduction, to simultaneously tackle the challenges regarding step economy and selectivity. The early development of our hypothesis focuses on an iridium-catalyzed process efficient mainly with activated alcs., which dictates harsh reaction conditions and thus limits its synthetic utility. Later, a significant advancement has been made on aliphatic primary alc. deoxygenation by employing a ruthenium complex, with good functional group tolerance and exclusive selectivity under practical reaction conditions. Its synthetic utility is further illustrated by excellent efficiency as well as complete chemo- and regioselectivity in both simple and complex mol. settings. Mechanistic discussion is also included with exptl. supports. Overall, our current method successfully addresses the aforementioned challenges in the pertinent field, providing a practical redox-based approach to the direct sp³ C-O defunctionalization of aliphatic primary alcs.

Journal of the American Chemical Society published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Wang, Ren-Tzong published the artcileAnion-induced ionic liquid crystals of diphenylviologens, SDS of cas: 47369-00-6, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2018), 6(35), 9430-9444, database is CAplus.

Two series of ionic liquid crystals derived from diphenylviologens, I and II, were prepared and their photophys. and electrochem. properties were also investigated. The crystallog. data of two single crystals, I (R = C_nH_2n+1, n = 10) and II-BF₄ (R = C_nH_2n+1, n = 12), showed that a mono- or bilayer-lamellar structure was induced by intermol. H-bonds. All mesophases were identified as smectic A phases by POM textures and powder XRD data. A linear correlation plot (R² = 0.8885) of the d-spacings vs. the calculated effective radius (R_eff) in compounds II was obtained. The aggregation-induced emission (AIE) ranging from ca. 463 to 529 nm observed in compounds II (e.g., X = BF₄, PF₆, RSO₃, OTf and NTf₂) was also anion dependent. Also, compounds II exhibited thermal switching, with an On/Off-emission mode between the Cr and SmA phases. In its cyclic voltammogram, compound I-RSO₃ (R = C_nH_2n+1, n = 12) exhibited two distinct reversible redox couples; in contrast, compound II-RSO₃ (R = C_nH_2n+1, n = 12) formed spike-like voltammetric peak potentials without redox couples.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published new progress about 47369-00-6. 47369-00-6 belongs to pyridine-derivatives, auxiliary class Pyridine,Salt,Benzene,Organic ligands for MOF materials,Nitrogen containing MOF ligands,Nitrogen containing MOF ligands, name is 1,1′-Diphenyl-[4,4′-bipyridine]-1,1′-diium chloride, and the molecular formula is C10H16Br3N, SDS of cas: 47369-00-6.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Park, Kwanghee Koh published the artcileSynthesis and proton-NMR of N-arylated nitrogen-containing aromatic heterocycles, Application In Synthesis of 47369-00-6, the publication is Bulletin of the Korean Chemical Society (1985), 6(3), 141-4, database is CAplus.

Pyridinium derivatives I and II (R = H, p-Me, p-Et, p-Cl, p-cyano, p-MeO, p-HO; R¹ = H, H₂NCO) were prepared by treating 4,4′-bipyridine, pyridine, and nicotinamide with 2,4-(O₂N)₂C₆H₃Cl to give the phenylpyridinium derivatives which were they treated with RC₆H₄NH₂.

Bulletin of the Korean Chemical Society published new progress about 47369-00-6. 47369-00-6 belongs to pyridine-derivatives, auxiliary class Pyridine,Salt,Benzene,Organic ligands for MOF materials,Nitrogen containing MOF ligands,Nitrogen containing MOF ligands, name is 1,1′-Diphenyl-[4,4′-bipyridine]-1,1′-diium chloride, and the molecular formula is C22H18Cl2N2, Application In Synthesis of 47369-00-6.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Hood, Thomas M. published the artcileSynthesis and Structural Dynamics of Five-Coordinate Rh(III) and Ir(III) PNP and PONOP Pincer Complexes, COA of Formula: C23H43NP2, the publication is Inorganic Chemistry (2019), 58(11), 7593-7601, database is CAplus and MEDLINE.

The synthesis and characterization of a homologous series of five-coordinate Rh(III) and Ir(III) complexes of PNP (2,6-(tBu₂PCH₂)₂C₅H₃N) and PONOP (2,6-(tBu₂PO)₂C₅H₃N) pincer ligands are described: [M(PNP)(biph)][BAr^F₄] (M = Rh, 1a; Ir, 1b; biph = 2,2′-biphenyl; Ar^F = 3,5-(CF₃)₂C₆H₃) and [M(PONOP)(biph)][BAr^F₄] (M = Rh, 2a; Ir, 2b). These complexes are structurally dynamic in solution, exhibiting pseudorotation of the biph ligand on the ¹H NMR time scale (ΔG^{îŒ?/sup> âˆ?0 kJ mol-1) and, in the case of the flexible PNP complexes, undergoing interconversion between helical and puckered pincer ligand conformations (ΔGîŒ?/sup> âˆ?0 kJ mol-1). Remarkably, the latter is sufficiently facile that it persists in the solid state, leading to temperature-dependent disorder in the associated x-ray crystal structures. Reaction of 1 and 2 with CO occurs for the Ir congeners 1b and 2b, giving sterically congested carbonyl derivatives}

Inorganic Chemistry published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, COA of Formula: C23H43NP2.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Meng, Fanqiang published the artcileAmmonia Formation Catalyzed by a Dinitrogen-Bridged Dirhenium Complex Bearing PNP-Pincer Ligands under Mild Reaction Conditions, Quality Control of 338800-13-8, the publication is Angewandte Chemie, International Edition (2021), 60(25), 13906-13912, database is CAplus and MEDLINE.

A series of rhenium complexes bearing a pyridine-based PNP-type pincer ligand are synthesized from rhenium phosphine complexes as precursors. A dinitrogen-bridged dirhenium complex bearing the PNP-type pincer ligands catalytically converts dinitrogen into ammonia during the reaction with KC8 as a reductant and [HPCy₃]BArF₄ (Cy=cyclohexyl, ArF=3,5-(CF₃)₂C₆H₃) as a proton source at -78 °C to afford 8.4 equiv of ammonia based on the rhenium atom of the catalyst. The rhenium-dinitrogen complex also catalyzes silylation of dinitrogen in the reaction with KC8 as a reductant and Me₃SiCl as a silylating reagent under ambient reaction conditions to afford 11.7 equiv of tris(trimethylsilyl)amine based on the rhenium atom of the catalyst. These results demonstrate the first successful example of catalytic nitrogen fixation under mild reaction conditions using rhenium-dinitrogen complexes as catalysts.

Angewandte Chemie, International Edition published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, Quality Control of 338800-13-8.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Kadassery, Karthika J. published the artcilePentacarbonylmethylmanganese(I) as a synthon for Mn(I) pincer catalysts, Formula: C23H43NP2, the publication is Dalton Transactions (2019), 48(14), 4467-4470, database is CAplus and MEDLINE.

Mn(I) complexes that enable metal-ligand cooperative substrate activation catalyze a range of transformations. Use of MeMn(CO)₅ as a synthon in place of typical Mn(CO)₅Br was explored and found to be quite versatile, generating catalytically active species in situ by activation of O-H, N-H, and even C-H bonds.

Dalton Transactions published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, Formula: C23H43NP2.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Nagano, Koichi published the artcileSynthesis of functional heteroaromatic compounds. Synthesis of viologen derivatives. I, Name: 1,1′-Diphenyl-[4,4′-bipyridine]-1,1′-diium chloride, the publication is Aromatikkusu (1988), 40(5/6), 144-9, database is CAplus.

Viologens I (R = Me, halogen) were prepared by the reaction of N,N‘-bis(2,4-dinitrophenyl)-4,4’-bipyridinium salts with substituted anilines. The polarog. behavior of I at a dropping Hg electrode was studied in H₂O. I embedded in PVP matrix indicated rapid reversible photoreductions The effect of the substituents on the photochromic behavior of I was also discussed.

Aromatikkusu published new progress about 47369-00-6. 47369-00-6 belongs to pyridine-derivatives, auxiliary class Pyridine,Salt,Benzene,Organic ligands for MOF materials,Nitrogen containing MOF ligands,Nitrogen containing MOF ligands, name is 1,1′-Diphenyl-[4,4′-bipyridine]-1,1′-diium chloride, and the molecular formula is C22H18Cl2N2, Name: 1,1′-Diphenyl-[4,4′-bipyridine]-1,1′-diium chloride.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Kuzuya, Masayuki published the artcileA novel single electron transfer in solid-state organic compounds: mechanically induced reduction of dipyridinium salts, Related Products of pyridine-derivatives, the publication is Journal of Physical Chemistry (1993), 97(30), 7800-2, database is CAplus.

When mech. vibration (56 Hz) of dipyridinium dications I (R = Me, R¹ = cyano, X = Br; R = Ph, R¹ = H, X = Cl; R = Me, R¹ = H, X = Cl), II (n = 2, 3, 4), and III (100 mg each) was conducted with a stainless steel ball (6.0-mm diameter, 890 mg) in a stainless steel twin-shell blender (7.8-mm diameter, 24 mm long) for 30 min at room temperature under strictly anaerobic conditions, the powder surfaces of all I and of II (n = 2) turned deep blue-purple, and nearly isotropic broad single-line ESR spectra were observed in the resulting powders, which can be ascribed to the formation of the corresponding monocation radicals via solid-state single electron transfer (SSET). Facile intermol. SSET also occurred from the monocation radical of I (R = Me, R¹ = H, X = Cl) to I (R = Ph, R¹ = H, X = Cl) and to II (n = 4). The mech. induced SSET reported herein seems to be a general phenomenon with broad implications for many organic compounds with relatively low redox potentials and is of special significance in connection with manufacturing a variety of solid materials in pulverized form in a metallic vessel.

Journal of Physical Chemistry published new progress about 47369-00-6. 47369-00-6 belongs to pyridine-derivatives, auxiliary class Pyridine,Salt,Benzene,Organic ligands for MOF materials,Nitrogen containing MOF ligands,Nitrogen containing MOF ligands, name is 1,1′-Diphenyl-[4,4′-bipyridine]-1,1′-diium chloride, and the molecular formula is C22H18Cl2N2, Related Products of pyridine-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Han, Zhiji published the artcileCO₂ Reduction Selective for C_â‰? Products on Polycrystalline Copper with N-Substituted Pyridinium Additives, Product Details of C22H18Cl2N2, the publication is ACS Central Science (2017), 3(8), 853-859, database is CAplus and MEDLINE.

Electrocatalytic CO₂ reduction to generate multicarbon products is of interest for applications in artificial photosynthetic schemes. This is a particularly attractive goal for CO₂ reduction by Cu electrodes, where a broad range of hydrocarbon products can be generated but where selectivity for C-C coupled products relative to CH₄ and H₂ remains an impediment. Herein the authors report a simple yet highly selective catalytic system for CO₂ reduction to C_â‰? hydrocarbons on a polycrystalline Cu electrode in bicarbonate aqueous solution that uses N-substituted pyridinium additives. Selectivities of 70-80% for C₂ and C₃ products with a hydrocarbon ratio of C_â‰?/CH₄ significantly >100 were observed with several additives. ¹³C-labeling studies verify CO₂ to be the sole C source in the C_â‰? hydrocarbons produced. Upon electroreduction, the N-substituted pyridinium additives lead to film deposition on the Cu electrode, identified in one case as the reductive coupling product of N-arylpyridinium. Product selectivity can also be tuned from C_â‰? species to H₂ (âˆ?0%) while suppressing methane with certain N-heterocyclic additives.

ACS Central Science published new progress about 47369-00-6. 47369-00-6 belongs to pyridine-derivatives, auxiliary class Pyridine,Salt,Benzene,Organic ligands for MOF materials,Nitrogen containing MOF ligands,Nitrogen containing MOF ligands, name is 1,1′-Diphenyl-[4,4′-bipyridine]-1,1′-diium chloride, and the molecular formula is C22H18Cl2N2, Product Details of C22H18Cl2N2.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Kao, Sheng-Yuan published the artcileAn electrochromic device based on all-in-one polymer gel through in-situ thermal polymerization, Recommanded Product: 1,1′-Diphenyl-[4,4′-bipyridine]-1,1′-diium chloride, the publication is Solar Energy Materials & Solar Cells (2016), 145(Part_1), 61-68, database is CAplus.

A self-standing all-in-one electrochromic gel utilizing Ph viologen (PV) and N,N,N’,N’-tetramethyl-1,4-phenylenediamine (TMPD) as the electrochromic materials is prepared by incorporating a thermo-cured cross-linked polymer matrix. The thermal-cured polymer matrix can prevent the agglomeration of PV happening on the electrode surface, resulting in the excellent write-erase ability of the obtained gelated ECD. Moreover, the cross-linker which possesses the long propoxylated arms leads to the easier diffusion for both PV and TMPD in the obtained polymer network. As a result, the obtained ECD exhibits a large transmittance change (ΔT>67% at 620 nm) within a short response time (<3.5 s) under an extremely low driving voltage (0.5 V). Besides, this device remains over 55% of ΔT after 10,000 cycles of switching.

Solar Energy Materials & Solar Cells published new progress about 47369-00-6. 47369-00-6 belongs to pyridine-derivatives, auxiliary class Pyridine,Salt,Benzene,Organic ligands for MOF materials,Nitrogen containing MOF ligands,Nitrogen containing MOF ligands, name is 1,1′-Diphenyl-[4,4′-bipyridine]-1,1′-diium chloride, and the molecular formula is C22H18Cl2N2, Recommanded Product: 1,1′-Diphenyl-[4,4′-bipyridine]-1,1′-diium chloride.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem