Month: November 2022

Massah, Ahmad R. published the artcileSolvent-free Williamson synthesis. An efficient, simple, and convenient method for chemoselective etherification of phenols and bisphenols, Related Products of naphthyridine, the publication is Synthetic Communications (2007), 37(11), 1807-1815, database is CAplus.

Etherification of phenols with dimethyl- and diethylsulfates and benzyl chloride was performed efficiently in the presence of a suitable solid base, NaHCO₃ or K₂CO₃, under solvent-free conditions. The reaction proceeded rapidly at low temperature, and the corresponding ethers were obtained with high purity and excellent yield. Selective etherification of electron-poor phenols in the presence of electron-rich ones and also selective mono-etherification of bisphenols are the noteworthy advantages of this method. This method is environmentally friendly.

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, Related Products of naphthyridine.

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

Yoshida, Masato published the artcileConvenient preparation of (chlorodifluoromethyl)arenes. Useful precursors for aryldifluoromethyl radicals, Safety of 1-(Difluoromethyl)naphthalene, the publication is Chemistry Letters (1992), 227-30, database is CAplus.

The chlorodifluoromethyl group was introduced into aromatic rings (of e.g., C₆H₆ to give PhCF₂Cl) using bis(chlorodifluoroacetyl) peroxide which was readily prepared from the corresponding acid anhydride with 30% hydrogen peroxide, and the chlorine was successively replaced by hydrogen or the allyl group in excellent yields under radical conditions.

Chemistry 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 C18H17N5O3, Safety of 1-(Difluoromethyl)naphthalene.

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

Yoshida, Masato published the artcileConvenient preparation of difluoromethylene-functionalized compounds from chlorodifluoroacetic acid, Safety of 1-(Difluoromethyl)naphthalene, the publication is Journal of Fluorine Chemistry (1994), 68(1), 33-8, database is CAplus.

A convenient route for the synthesis of difluoromethylene-functionalized compounds from chlorodifluoroacetic acid has been investigated. Bis(chlorodifluoroacetyl) peroxide, which was synthesized from chlorodifluoroacetic acid via its acid anhydride, was found to be a good reagent for the chlorodifluoromethylation of electron-rich aromatic compounds and olefins. The chlorine atom of the chlorodifluoromethylated compounds, thus prepared, exchanged hydrogen and allyl groups by reaction with tributyltin hydride and allyltributyltin, resp., under radical conditions.

Journal of Fluorine Chemistry 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 C8H11NO, Safety of 1-(Difluoromethyl)naphthalene.

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

Morioku, Kumika published the artcileConcurrent Formation of Carbon-Carbon Bonds and Functionalized Graphene by Oxidative Carbon-Hydrogen Coupling Reaction, Safety of 2,2′-Dimethoxy-1,1′-binaphthalene, the publication is Scientific Reports (2016), 25824pp., database is CAplus and MEDLINE.

Oxidative C-H coupling reactions were conducted using graphene oxide (GO) as an oxidant. GO showed high selectivity compared with commonly used oxidants such as (diacetoxyiodo) benzene and 2,3-dichloro-5,6-dicyano-p-benzoquinone. A mechanistic study revealed that radical species contributed to the reaction. After the oxidative coupling reaction, GO was reduced to form a material that shows electron conductivity and high specific capacitance. Therefore, this system could concurrently achieve two important reactions: C-C bond formation via C-H transformation and production of functionalized graphene.

Scientific Reports 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

Tavana, Mahdie published the artcileOxidative coupling of 2-naphthol and 2-alkoxynaphthalene by CuCl₂ and FeCl₃ investigation of stereoselective induction effects of optically active compounds on the coupling process under solid-state conditions and ionic liquid media, HPLC of Formula: 2960-93-2, the publication is Asian Journal of Chemistry (2011), 23(7), 3097-3100, database is CAplus.

A new method for the 1,1′-binaphthalene-2,2′-diol and 1,1′-binaphthyl-2,2′-dialkylether by CuCl₂ and FeCl₃ under solid-state condition and ionic liquid was described. The stereoselectively coupling of 2-naphthol by CuCl₂ and FeCl₃ in presence of optically active amino acid is also studied. The optically purity of (S)-binaphthalene-2,2′-diol in the presence of L-2-phenylglycine by FeCl₃.H₂O in solid state and ionic liquid is 41 and 96%, resp.

Asian Journal of 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 C11H24O3, HPLC of Formula: 2960-93-2.

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

Hara, Shoji published the artcileIF₅-pyridine-HF: air- and moisture-stable fluorination reagent, Quality Control of 53731-26-3, the publication is Tetrahedron (2012), 68(49), 10145-10150, database is CAplus.

IF₅-pyridine-HF, an air- and moisture-stable solid, can be used as a fluorination reagent for the introduction of fluorine atoms to the α-position of the sulfur atom in sulfides. The desulfurizing-fluorination reactions of benzylic sulfides, thioacetals, and 2-(methylthio)-1,3-dithiane derivatives were also performed using this reagent.

Tetrahedron 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 C11H8F2, Quality Control of 53731-26-3.

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

Rout, Kanhu Charan published the artcileAromatic C-nitrosation by a copper(II)-nitrosyl complex, Recommanded Product: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Dalton Transactions (2015), 44(4), 1829-1835, database is CAplus and MEDLINE.

Copper(II) complex of 4-amino-3-hydroxynaphthalene-1-sulfonic acid was synthesized and characterized. Upon addition of nitric oxide, the copper(II) center of the complex in methanol undergoes reduction through an unstable copper(II)-nitrosyl intermediate. The formation of the intermediate was confirmed by UV-visible and FTIR spectroscopy. The reduction of the copper(II) center was accompanied with a simultaneous C-nitrosation of the aromatic ring of the ligand. The C-nitrosation product was isolated and characterized by various spectroscopic analyses.

Dalton Transactions 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

Satheesh Babu, S. published the artcileDetoxification and color removal of Congo red by a novel Dietzia sp. (DTS26) – A microcosm approach, Application of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Ecotoxicology and Environmental Safety (2015), 52-60, database is CAplus and MEDLINE.

The present study deals with the decolorization and detoxification of Congo red (CR) by a novel marine bacterium Dietzia sp. (DTS26) isolated from Divar Island, Goa, India. The maximum decolorization of 94.5% (100 mg L^-1) was observed under static condition within 30 h at pH 8 and temperature 32±2 °C. Bacterially treated samples could enhance the light intensity by 38% and the primary production levels 5 times higher than the untreated. The strain was also able to reduce COD by 86.4% within 30 h at 100 mg L^-1 of CR dye. The degraded metabolites of CR dye were analyzed by FTIR, HPLC, GC-MS and the end product closely matches with 4-amino-3-naphthol-1-sulfonate which is comparatively less toxic than CR. Bioassay experiments conducted in treated samples for Artemia franciscana showed better survival rates (after 72 h) at higher concentration of CR (500 mg L^-1). This work suggests the potential application of DTS26 in bioremediation of dye wastes and its safe disposal into coastal environment.

Ecotoxicology and Environmental Safety 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, Application of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

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

Denbela, Getachew published the artcileComputational study on 4-amino-3- hydroxynaphthalene-1-sulfonic acid (AHNSA), Quality Control of 116-63-2, the publication is International Research Journal of Pure and Applied Chemistry (2017), 14(4), IRJPAC.36284/1-IRJPAC.36284/14, database is CAplus.

A computational study on 4-amino-3-hydroxynaphthalene-1-sulfonic acid (AHNSA) has been carried out to investigate formation of poly-(AHNSA), and to obtain binding structures and energies of AHNSA-Ephedrine and AHNSA-Caffeine complexes. For this purpose, the DFT/B3LYP/6-31G(D) and DFT/B3LYP/6-31+G(D) level of theories were utilized. These were investigated from anal. of their at. charge distributions, total spin d., frontier MOs, electrostatic potential maps and calculations of binding energies. Results from anal. suggest that homo-polymerization of AHNSA should involve the MOs arising between radical cations formed from the neutral monomer. The resulting data illustrated that the method was likely to be useful for homopolymerization of AHNSA. Calculated binding energies of AHNSA-Caffeine and AHNSA-Ephedrine complexes were -8.77 kcal mol^-1 and -8.36 kcal mol^-1, resp., which indicated that both complexes could be formed.

International Research Journal of Pure and Applied Chemistry 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

Okamoto, Akiko published the artcileElectrophilic aromatic aroylation polycondensation synthesis of wholly aromatic polyketone composed of 2,2′-dimethoxy-1,1′-binaphthylylene moiety, Computed Properties of 2960-93-2, the publication is Reactive & Functional Polymers (2007), 67(11), 1243-1251, database is CAplus.

A wholly aromatic polyketone containing 2,2′-dimethoxy-1,1′-binaphthylylene moiety was successfully synthesized via electrophilic aromatic aroylation polycondensation with the aid of trifluoromethanesulfonic acid (TfOH) or phosphorus(V) oxide-methanesulfonic acid mixture (P₂O₅-MsOH). The polycondensation reactions employing two sets of monomers of opposite combination that should afford the same structure of repeating unit showed distinct results. The polycondensation employing 2,2′-dimethoxy-1,1′-binaphthyl (4) as the acyl-acceptant monomer proceeded to give medium-mol.-weight polymer. The polymer synthesis via transformation of biaryl 4 into the corresponding acyl-donor monomer 12 followed by polycondensation with 2,2′-dimethoxybiphenyl (1) predominated the procedure of direct usage of biaryl 4 as the acyl-acceptant monomer. Acyl-acceptant monomer has been demonstrated to play a more crucial role in determination of polymerizability than acyl-donor one.

Reactive & Functional Polymers 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, Computed Properties of 2960-93-2.

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