Day: December 8, 2022

Wang, Yaxin published the artcileHalogen-Bond-Promoted Photoactivation of Perfluoroalkyl Iodides: A Photochemical Protocol for Perfluoroalkylation Reactions, Safety of 2-Bromopyridin-3-amine, the publication is Organic Letters (2017), 19(6), 1442-1445, database is CAplus and MEDLINE.

A new protocol for photochem. perfluoroalkylation reactions using perfluoroalkyl iodide, amine additive, and THF solvent is reported. This protocol does not require a photoredox catalyst and proceeds at ambient temperature with irradiation from a compact fluorescent lamp, low-intensity UV lamp, or sunlight. This protocol can be applied to the synthesis of perfluoroalkyl-substituted phenanthridines and effect the iodo-perfluoroalkylation of alkenes/alkynes and the C-H perfluoroalkylation of electron-rich arenes and heteroarenes. This C-H perfluoroalkylation reaction offers a unique method for site-selective labeling of oligopeptides at the tryptophan residue.

Organic Letters published new progress about 39856-58-1. 39856-58-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Bromide,Amine, name is 2-Bromopyridin-3-amine, and the molecular formula is C44H28ClFeN4, Safety of 2-Bromopyridin-3-amine.

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

Song, Fan published the artcileSynergistically Improved Antifouling Efficiency of a Bioinspired Self-renewing Interface via a Borneol/ Boron Acrylate Polymer, Synthetic Route of 971-66-4, the publication is Journal of Colloid and Interface Science (2022), 459-466, database is CAplus and MEDLINE.

Underwater facilities are often perplexed by severe and ubiquitous biofouling. The widely applied com. antifouling materials still have several challenges in static applications. Herein, a polymer containing isoborneol and borane (PBABs), the borneol derivative structure and grafted pyridine-triphenylborane (PTPB) as antifouling groups were prepared by radical polymerization PBABs showed high antibacterial rates for Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) of up to 95.1% and 81.1%, resp., confirming superior antibacterial adhesion propertys. More importantly, PBABs effectively reduced the expression of mussel adhesion protein, indicating superior antifouling propertys, resulting from the synergistic effect of multiple antifouling functional groups on the material′s surface. Therefore, the PBABs have been evaluated as noncytotoxic, low-cost, easily synthesized, and mass-produced, which demonstrates their great potential for actual marine applications.

Journal of Colloid and Interface Science published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is C10H10O2, Synthetic Route of 971-66-4.

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

Li, Yabo published the artcileDirect C-H Arylation of Thiophenes at Low Catalyst Loading of a Phosphine-Free Bis(alkoxo)palladium Complex, Formula: C5H6BNO2, the publication is Journal of Organic Chemistry (2014), 79(7), 2890-2897, database is CAplus and MEDLINE.

An efficient phosphine-free direct C-H arylation of thiophenes at the α-position has been developed at low catalyst loading of bis(alkoxo)palladium complex ( 0.1-0.2 mol %). The developed synthetic method can be applied to the synthesis of α-aryl/heteroaryl thiophenes from aryl or heteroaryl bromides in good to excellent yields and is compatible with the substrates bearing electron-donating or electron-withdrawing groups. The reactivities of the 2- and 5-positions of thiophenes are equivalent and not dependent on steric hindrance under optimal conditions. This condition can also be applied to other heterocyclic moieties such as benzothiophene, benzofuran, and pyrrole with high conversion yields.

Journal of Organic Chemistry published new progress about 197958-29-5. 197958-29-5 belongs to pyridine-derivatives, auxiliary class Pyridine,Boronic acid and ester, name is 2-Pyridinylboronic acid, and the molecular formula is C5H6BNO2, Formula: C5H6BNO2.

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

Guo, Peng published the artcileTwo three-dimensional pillar-layer Ag^I-frameworks with helical arrays containing hexamine, Category: pyridine-derivatives, the publication is Inorganic Chemistry Communications (2011), 14(1), 172-175, database is CAplus.

Two three-dimensional pillar-layer Ag^I-frameworks with helical arrays were synthesized at room temperature Compound 1, {[Ag₂(H₂O)(L2)₂L1]·H₂O}_n (L1 = hexamethylenetetramine, HL2 = 3-pyridinesulfonic acid), is constructed from two-dimensional (6,3) layers which are braced by helical arrays; compound 2, {[Ag₃(L1)₂(L3)]·6H₂O}_n (H₃L3 = citric acid), is created by two-dimensional layers which are made up of the mix-helical arrays and further pillared by L3 anions and Ag ions. Compounds 1 and 2 were characterized by single-crystal x-ray structure determination, powder X-ray diffraction, IR and TGA. Also, the water and methanol adsorption isotherms for compound 1 were studied.

Inorganic Chemistry Communications published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C5H5NO3S, Category: pyridine-derivatives.

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

Fang, Wei-Hui published the artcileTitanium-Oxo Cluster Based Precise Assembly for Multidimensional Materials, COA of Formula: C5H5NO3S, the publication is Chemistry of Materials (2017), 29(7), 2681-2684, database is CAplus.

Nanosized titanium-oxo clusters have been successfully organized into materials with various dimensions from 1D chain to 2D layer and finally 3D diamond framework. During the assembly, polymetallic dopants like {Cu2X2}, {Cu4X4} and {Cu4X4-DABCO-Cu4X4} (X = halide; DABCO = 1,4-diazabicyclo[2.2.2]octane) have been introduced to Ti-O structures for the first time, which brings versatile light absorption behaviors and bandgap properties. Based on the successes of the above mol. assembly, the developed methodol. has further been extended to the macroscopic scale assembly of a Cu-Ti layer to the surface of a Ti-O crystal. Therefore, this work provides an efficient approach for the assembly engineering of titanium-oxo clusters and the construction of core-shell materials with well-defined at. structures.

Chemistry of Materials published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C5H5NO3S, COA of Formula: C5H5NO3S.

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

Xia, Hongyu published the artcileVisible Light Induced Aerobic Coupling of Arylboronic Acids Promoted by Hydrazone, Category: pyridine-derivatives, the publication is Advanced Synthesis & Catalysis (2022), 364(5), 922-929, database is CAplus.

A visible-light-induced oxidative coupling of arylboronic acids was developed for the synthesis of biaryls Ar¹Ar² [Ar¹ = Ar² = Ph, 4-MeC₆H₄, 4-FC₆H₄, etc.; Ar¹ = 4-BrC₆H₄, 4-MeC₆H₄, 4-FC₆H₄, etc.; Ar₂ = 4-H(O)CC₆H₄, 3-MeOC₆H₄, 4-AcC₆H₄, etc.]. The reaction that employed polydentate hydrazones as the bifunctional catalyst works smoothly under room temperature It was compatible with a wide range of functional group. The study of UV-Vis spectrum indicated that hydrazone and its complex with CuI show major absorptions upon visible-light, which secures the dual role of hydrazone as both ligand and photocatalyst in this reaction. Hence, the reaction was proposed to involve stepwise transmetallations, photo-induced oxidations, and reductive elimination.

Advanced Synthesis & Catalysis published new progress about 612845-44-0. 612845-44-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Boronic acid and ester,Ether,Boronic Acids,Boronic acid and ester, name is (6-Ethoxypyridin-3-yl)boronic acid, and the molecular formula is C9H9F5Si, Category: pyridine-derivatives.

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

Zhao, Rui published the artcileSyntheses, structures and properties of cyclometalated iridium(III) complexes based on 2-phenyl-5-nitropyridyl and different strong-field ancillary ligands, HPLC of Formula: 89076-64-2, the publication is Inorganica Chimica Acta (2014), 409(PB), 372-378, database is CAplus.

The reactions of [Ir(5-NO₂-ppy)₂(PPh₃)Cl] (5-NO₂-ppy = 2-phenyl-5-nitropyridyl, PPh₃ = PPh₃, 1) with pseudohalides, replacing the weak π donor Cl^– with strong σ donors and π acceptors, lead to three new Ir(III) cyclometalated complexes [Ir(5-NO₂-ppy)₂(PPh₃)(L)] (L = NCO^–, 2; NCS^–, 3; N₃^–, 4) based on 2-phenylpyridyl (ppy) derivative, PPh₃ and different pseudohalogen strong-field ancillary ligands. 2–4 Are unambiguously characterized and their crystal structures are also determined by x-ray crystallog. The HOMO-LUMO electronic energy gaps of 1–4 estimated from the cyclic voltammetry measurements are comparable with those calculated from the UV-visible absorption spectra, which are both in the order of 3 > 1 > 2 > 4. Also, the electrochem. and photophys. properties of 1–4 show that the introduction of the electron-withdrawing nitro group to the pyridyl ring of the ppy backbone narrows the HOMO-LUMO electronic energy gaps, compared with those of corresponding ppy-containing Ir(III) complexes.

Inorganica Chimica Acta published new progress about 89076-64-2. 89076-64-2 belongs to pyridine-derivatives, auxiliary class Pyridine,Nitro Compound,Benzene, name is 5-Nitro-2-phenylpyridine, and the molecular formula is C18H28B2O4, HPLC of Formula: 89076-64-2.

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

Shen, Xuan published the artcileNew 2-phenyl-5-nitropyridyl containing iridium(III) cyclometalated complexes: syntheses, structures, electrochemistry and photophysical properties, Application of 5-Nitro-2-phenylpyridine, the publication is Inorganic Chemistry Communications (2011), 14(9), 1511-1515, database is CAplus.

New 2-phenyl-5-nitropyridyl containing iridium(III) cyclometalated complexes ([Ir(5-NO₂-ppy)₂Cl]₂ (1, 5-NO₂-ppy = 2-phenyl-5-nitropyridyl), [Ir(5-NO₂-ppy)₂(PPh₃)Cl] (2, PPh₃ = triphenylphosphine), [Ir(5-NO₂-ppy)₂(pic)] (3, pic = picolinic acid)) were synthesized and unambiguously characterized. The crystal structures of 2 and 3 were determined by x-ray diffraction analyses. The HOMO-LUMO energy gaps of 1–3 estimated by the cyclic voltammetry (CV) show values in the order of 2 > 3 > 1. The UV-visible absorption and the solid photoluminescence (PL) spectra of 1–3 also were measured, exhibiting the changing orders being consistent with that of the HOMO-LUMO energy gaps. Also, the UV-visible absorption spectra of 1–3 show obvious red shifts compared with those of the corresponding 2-phenylpyridyl (ppy) containing Ir(III) complexes ([Ir(ppy)₂Cl]₂, Ir(ppy)₂(PPh₃)Cl and Ir(ppy)₂(pic)) in which no strongly electron-withdrawing nitro groups are introduced to the pyridyl rings of the ppy ligands. Thus, the HOMO-LUMO energy gaps of 1–3 should be narrower than those of [Ir(ppy)₂Cl]₂, Ir(ppy)₂(PPh₃)Cl and Ir(ppy)₂(pic).

Inorganic Chemistry Communications published new progress about 89076-64-2. 89076-64-2 belongs to pyridine-derivatives, auxiliary class Pyridine,Nitro Compound,Benzene, name is 5-Nitro-2-phenylpyridine, and the molecular formula is C13H10N2S, Application of 5-Nitro-2-phenylpyridine.

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

Zhou, Fei published the artcileNitroarenes as Nitrogen Source in Intermolecular Palladium-Catalyzed Aryl C-H Bond Aminocarbonylation Reactions, Name: 5-Methyl-2-(p-tolyl)pyridine, the publication is Angewandte Chemie, International Edition (2017), 56(16), 4530-4534, database is CAplus and MEDLINE.

A three-component palladium-catalyzed aminocarbonylation of aryl and heteroaryl sp² C-H bonds using nitroarenes as the nitrogen source was achieved using Mo(CO)₆ as the reductant and origin of the CO. This intermol. C-H bond functionalization does not requires any exogenous ligand to be added, and our mechanism experiments indicate that the palladacycle catalyst serves two roles in the aminocarbonylation reaction: reduce the nitroarene to a nitrosoarene and activate the sp² C-H bond.

Angewandte Chemie, International Edition published new progress about 85237-71-4. 85237-71-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is 5-Methyl-2-(p-tolyl)pyridine, and the molecular formula is C12H10O4S, Name: 5-Methyl-2-(p-tolyl)pyridine.

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

Zhang, Xinyu published the artcileSelenium atoms induce organic doped systems to produce pure phosphorescence emission, Computed Properties of 91-02-1, the publication is Chemical Communications (Cambridge, United Kingdom) (2022), 58(8), 1179-1182, database is CAplus and MEDLINE.

A host-guest system is constructed using a guest containing two selenium atoms. The selenium atoms can increase the spin-orbit coupling constant and the conjugation degree, thereby increasing the emission wavelength, and making the materials show only phosphorescence emission.

Chemical Communications (Cambridge, United Kingdom) published new progress about 91-02-1. 91-02-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene,Ketone, name is Phenyl(pyridin-2-yl)methanone, and the molecular formula is C10H15NO, Computed Properties of 91-02-1.

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