Month: November 2022

Zou, Zhenlei published the artcileElectrochemical-Promoted Nickel-Catalyzed Oxidative Fluoroalkylation of Aryl Iodides, Recommanded Product: 1-(Difluoromethyl)naphthalene, the publication is Organic Letters (2021), 23(21), 8252-8256, database is CAplus and MEDLINE.

This work describes a general strategy for metal-catalyzed cross-coupling of fluoroalkyl radicals with aryl halides ArX (Ar = biphenyl-4-yl, benzothiophen-3-yl, benzodioxol-5-yl, etc.; X = Br, I) under electrochem. conditions. The contradiction between anodic oxidation of fluoroalkyl sulfinates NaSO₂CF₂H, NaSO₂CH₂F and cathodic reduction of low-valent nickel catalysts can be well addressed by paired electrolysis, allowing for direct introduction of fluorinated functionalities into aromatic systems.

Organic Letters published new progress about 53731-26-3. 53731-26-3 belongs to naphthyridine, auxiliary class Difluoromethyl,Fluoride,Naphthalene, name is 1-(Difluoromethyl)naphthalene, and the molecular formula is C3H8N2S, Recommanded Product: 1-(Difluoromethyl)naphthalene.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Zhao, Qing published the artcileAn Efficient Method for Sterically Demanding Suzuki-Miyaura Coupling Reactions, Product Details of C22H18O2, the publication is Chemistry – A European Journal (2013), 19(7), 2261-2265, database is CAplus and MEDLINE.

The synthesis of tetra-ortho-substituted biaryls bearing secondary alkyl ortho substituents, such as iso-Pr groups, through Suzuki-Miyaura couplings was catalyzed by Pd(OAc)₂ and a biaryl monophosphorus ligand, e.g. I. E.g., in presence of Pd(OAc)₂, I, and NaOtBu, Suzuki-Miyaura coupling of 2-bromo-1,3-dimethoxybenzene and 2,4,6-triisopropylphenylboronic acid gave 97% tetra-ortho-substituted biaryl (II).

Chemistry – A European Journal published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C18H34N4O5S, Product Details of C22H18O2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Pan, Wenjing published the artcileA mild and practical method for deprotection of aryl methyl/benzyl/allyl ethers with HPPh₂ and ^tBuOK, Category: naphthyridine, the publication is Organic & Biomolecular Chemistry (2021), 19(35), 7633-7640, database is CAplus and MEDLINE.

A general method for the demethylation, debenzylation, and deallylation of aryl ethers ROMe (R = C₆H₅, 3-FC₆H₄, 2-naphthyl, etc.), R¹OCH²Ph (R¹ = C₆H₅, 5,6,7,8-tetrahydronaphthalen-2-yl, 2-naphthyl, etc.) and R²OCH²CH=CH² (R² = C₆H₅, 2,3-dimethylphenyl, 1-naphthyl, etc.) using HPPh₂ and ^tBuOK is reported. The reaction features mild and metal-free reaction conditions, broad substrate scope, good functional group compatibility, and high chem. selectivity towards aryl ethers over aliphatic structures. Notably, this approach is competent to selectively deprotect the allyl or benzyl group, making it a general and practical method in organic synthesis.

Organic & Biomolecular Chemistry published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Category: naphthyridine.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Luo, Lin published the artcileStudy on molybdenum blue spectrophotomertric method for determination of trace silicon in high purity hafnium, Recommanded Product: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Henan Huagong (2015), 32(5), 60-62, database is CAplus.

The research develops a molybdenum blue spectrophotometry in high-purity hafnium trace silicon, using hydrofluoric acid to dissolve the sample, adding boric acid masking fluoride ion. adding ammonium molybdate to react with silicic acid ions formed by the yellow silicon phase heteropolyacid complexes with tartaric acid medium at 1-amino-2-naphthol-4-sulfonic acid, measuring the absorbance and recovery tests. The test results showed that: the method is simple, qual. method, reproducibility, good accuracy, to meet the trace anal. inspection visit silicon requirements.

Henan Huagong published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Recommanded Product: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Lee, Haejoo published the artcileDendritic nanospace constructed by only glycerol units enhanced uptake of a fluorescent molecule in aqueous solution, Quality Control of 116-63-2, the publication is Chemical Communications (Cambridge, United Kingdom) (2012), 48(4), 546-548, database is CAplus and MEDLINE.

A polyglycerol dendrimer (PGD) of generation 2, consisting only glycerol units, constructed nanospace capable of uptake of a fluorescent mol. with a 1 : 1 stoichiometry. On the other hand, a PGD of generation 1 trapped the mol. at the outer part.

Chemical Communications (Cambridge, United Kingdom) published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Quality Control of 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Alvey, Paul M. published the artcileConjugated NDI-Donor Polymers: Exploration of Donor Size and Electrostatic Complementarity, Name: 9,10-Diethynylanthracene, the publication is Macromolecules (Washington, DC, United States) (2013), 46(3), 718-726, database is CAplus.

Conjugated donor-acceptor copolymers comprised of electron-deficient 1,4,5,8-naphthalenetetracarboxylic diimide (NDI) linked to a series of relatively electron-rich aromatics via ethynyl spacers were synthesized and characterized. While LUMO levels remained constant at -3.75 eV, HOMO levels were sensitive to the relatively electron-rich aromatic donors and systematically tuned from -5.68 to -5.17 eV. Regardless of the electron-rich comonomer, fluorescence and x-ray diffraction data were consistent with the polymer chains being assembled through the stacking of NDI moieties in an offset face-to-face fashion rather than alternating donor-acceptor stacks.

Macromolecules (Washington, DC, United States) published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C18H10, Name: 9,10-Diethynylanthracene.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Morisue, Mitsuhiko published the artcileFully Conjugated Porphyrin Glass: Collective Light-Harvesting Antenna for Near-Infrared Fluorescence beyond 1 μm, Product Details of C18H10, the publication is ACS Omega (2018), 3(4), 4466-4474, database is CAplus and MEDLINE.

Expanded π-systems with a narrow HOMO-LUMO band gap encounter deactivation of excitons due to the “energy gap law” and undesired aggregation. This dilemma generally thwarts the near-IR (NIR) luminescence of organic π-systems. A sophisticated cofacially stacked π-system is known to involve exponentially tailed disorder, which displays exceptionally red-shifted fluorescence even as only a marginal emission component. Enhancement of the tail-state fluorescence might be advantageous to achieve NIR photoluminescence with an expected collective light-harvesting antenna effect as follows: (i) efficient light-harvesting capacity due to intense electronic absorption, (ii) a long-distance exciton migration into the tail state based on a high spatial d. of the chromophore site, and (iii) substantial transmission of NIR emission to circumvent the inner filter effect. Suppression of aggregation-induced quenching of fluorescence could realize collective light-harvesting antenna for NIR-luminescence materials. This study discloses an enhanced tail-state NIR fluorescence of a self-standing porphyrin film at 1138 nm with a moderate quantum efficiency based on a fully π-conjugated porphyrin that adopts an amorphous form, called “porphyrin glass”.

ACS Omega published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C18H10, Product Details of C18H10.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Maeyama, Katsuya published the artcileP₂O₅-MsOH-mediated regioselective diaroylation of 2,2′-dimethoxy-1,1′-binaphthyl, Formula: C22H18O2, the publication is Synthetic Communications (2004), 34(17), 3243-3250, database is CAplus.

Phosphorus pentoxide-methanesulfonic acid (P₂O₅-MsOH) mediated electrophilic aromatic substitution diaroylation of 2,2′-dimethoxy-1,1′-binaphthyl with several aromatic carboxylic acids proceeds to afford 6,6′-diaroylated adducts as single regioisomers.

Synthetic Communications published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Formula: C22H18O2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Maeyama, Katsuya published the artcileNickel complex-mediated synthesis of optically active wholly aromatic polyketones bearing 2,2′-dimethoxy-1,1′-binaphthyl-6,6′-ene units, Safety of 2,2′-Dimethoxy-1,1′-binaphthalene, the publication is Polymer Journal (Tokyo, Japan) (2005), 37(10), 736-741, database is CAplus.

Two 6,6′-Bis(chlorobenzoyl)-2,2′-dimethoxy-1,1′-binaphthyls (3,3′-Cl and 4,4′-Cl) are prepared via P₂O₅-MsOH mediated regioselective diaroylation of 2,2′-dimethoxy-1,1′-binaphthyl. NiBr₂/Zn-mediated aromatic coupling polymerization of 6,6′-bis(chlorobenzoyl)-2,2′-dimethoxy-1,1′-binaphthyls yields the corresponding wholly aromatic polyketones. When optically active bis(chlorobenzoylated) binaphthyls are employed, optically active wholly aromatic polyketones with large sp. rotations, excellent thermal resistance, and excellent solubility to organic solvents are obtained.

Polymer Journal (Tokyo, Japan) published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Safety of 2,2′-Dimethoxy-1,1′-binaphthalene.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Hirose, Daisuke published the artcileEnantioseparation on helical poly(diphenylacetylene)s bearing optically-active pendants: Effects of differences in higher-order structures of kinetically-trapped and thermodynamically-stable states on chiral recognition ability, Product Details of C22H18O2, the publication is Journal of Chromatography A (2022), 463164, database is CAplus and MEDLINE.

An optically-active poly(diphenylacetylene) (PDPA) bearing carboxy pendant groups with left-handed helicity memory (M-h-poly-1), synthesized using the noncovalent helicity-induction-and-memory strategy, was converted into a PDPA bearing optically-active pendant groups through an amide bonding (M-h_KT-poly-2S), while maintaining the left-handed helicity memory, by reaction with (S)-1-phenylethylamine ((S)-2) using a condensing reagent at room temperature Its chiral recognition ability was investigated as a chiral stationary phase (CSP) for high-performance liquid chromatog. (HPLC). M-h_KT-poly-2S exhibited significantly different chiral recognition ability towards racemates compared to the previously reported corresponding helical PDPA bearing the same optically-active pendant groups (M-h_TS-poly-2S) (prepared by the reaction of an optically-inactive PDPA bearing carboxy pendants with (S)-2, followed by thermal annealing, to induce a left-handed helical structure in the polymer main chain). Although the main chains of both M-h_KT-poly-2S and M-h_TS-poly-2S formed almost completely left-handed helical structures, their higher-order structures varied slightly, as confirmed by various spectroscopic methods (UV-Vis, CD (CD), IR, and vibrational CD). M-h_KT-TS-poly-2S, the PDPA formed on the thermal annealing of M-h_KT-poly-2S, exhibited the same higher-order structure and chiral discrimination ability as M-h_TS-poly-2S. Therefore, slight differences in the higher-order structures of the kinetically-trapped metastable state (M-h_KT-poly-2S) and the thermodynamically-stable state (M-h_TS-poly-2S), due to differences in synthetic procedures, significantly impact their chiral recognition abilities as CSPs, even with identical primary structures and helix-sense of the polymer main chain.

Journal of Chromatography A published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Product Details of C22H18O2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem