Category: 613-33-2

Luo, Yuqing published the artcileComparison of 4,4′-Dimethylbiphenyl from Biomass-Derived Furfural and Oil-Based Resource: Technoeconomic Analysis and Life-Cycle Assessment, Related Products of catalysis-chemistry, the publication is Industrial & Engineering Chemistry Research (2022), 61(25), 8963-8972, database is CAplus.

Replacing oil-based toluene with biomass-derived furfural for 4,4′-dimethylbiphenyl (DMBP) production can pave the way for sustainable polyester manufacture This work compared the economic and environmental performances of two conceptual designs of 4,4′-DMBP production The first toluene-based route consists of toluene alkylation to (methylcyclohexyl)toluene (MCHT), MCHT dehydrogenation to DMBP, and isomerization of lower-valued 3,3′-DMBP. The renewable furfural-based route includes hydrogenation of furfural to 2-methylfuran (MF), oxidative coupling of MF to 5,5′-dimethylfuran (DMBF), and tandem Diels-Alder dehydration of 5,5′-DMBF to 4,4′-DMBP. The reaction conditions are optimized to achieve a more economically feasible process using furfural feedstock. At a scale of 83 kmol/h feedstock, the 4,4′-DMBP min. selling price of the furfural-based route is $3044/t, while that of the toluene-based route is $2488/t. The feedstock and 3,4′-DMBP isomer prices are identified as critical parameters for the economic evaluation by sensitivity anal. A “cradle-to-gate” life-cycle assessment confirms that furfural-based DMBP production emits significantly fewer greenhouse gas (5.00 kg CO₂ equiv/kg DMBP) as compared to the toluene-based counterpart (8.28 kg CO₂ equiv/kg DMBP).

Industrial & Engineering Chemistry Research published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Cho, Hong Je published the artcileSelective Synthesis of 4,4′-Dimethylbiphenyl from 2-Methylfuran, Synthetic Route of 613-33-2, the publication is ACS Sustainable Chemistry & Engineering (2021), 9(8), 3316-3323, database is CAplus.

4,4′-Dimethylbiphenyl (DMBP) is a promising platform chem. for the production of polymer precursors, plasticizers, and metal-organic frameworks among other materials. We report a two-step process to produce DMBP from 2-methylfuran (MF) via the formation of the intermediate 5,5′-dimethyl-2,2′-bifuran (DMBF). DMBF is generated from the Pd-catalyzed oxidative coupling of MF in the presence of trifluoroacetic acid (TFA) with high selectivity (94%). Optimization of reaction conditions yields a 20-fold increase in site-time-yield (STY = 6.99 h^-1) compared with a previously reported protocol. High O₂ pressure (7 bar) and a high TFA concentration (3 M) are critical to improve the DMBF formation rate. For the conversion of DMBF to DMBP, we show that phosphoric acid supported on silica (P-SiO₂) catalyzes tandem Diels-Alder and dehydration reactions of DMBF with ethylene to produce DMBP (83% yield). The high yield and selectivity are a consequence of the weak Bronsted acid sites in P-SiO₂ that dehydrate furan-ethylene cycloadducts without substantial formation of carbon deposits.

ACS Sustainable Chemistry & Engineering published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Synthetic Route of 613-33-2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Das, Debasish published the artcileSynthesis, photophysical properties and catalytic activity of ¦Ê³-SCS pincer palladium (II) complex of N,N’-di-tert-butylbenzene-1,3-dicarbothioamide supported by DFT analysis, Computed Properties of 613-33-2, the publication is Inorganica Chimica Acta (2022), 120704, database is CAplus.

The title complex [PdCl(L)] (1), is obtained from the reaction of SCS pincer ligand HL (where, HL = N,N’-di-tert-butylbenzene-1,3-dicarbothioamide) with lithium tetrachloropalladate (II) in methanol. The compound 1 is characterized by elemental anal., FTIR, ¹H, and ¹³C NMR spectroscopy, UV-Vis spectroscopy, and X-ray crystallog. techniques. At room temperature, 1 emits luminescence light of wavelength 460 nm in the solid state upon excitation by UV light of wavelength 280 nm. The average emission lifetime indicates that, both the ligand and complex emission is fluorescence in nature and involves mainly ligand centers ¦Ð-¦Ð* deexcitation. It also shows good catalytic activity towards Mizoroki-Heck and Suzuki-Miyaura cross-coupling reactions of aryl bromides with tert-Bu acrylate and p-tolylboronic acid resp. For both type of reactions, >99% conversion of the substrates is found to occur for electronically activated p-nitro bromobenzene using 1 mol % of 1. Further, modern DFT calculations are performed to decipher the mechanistic insight on the preferable pathways of the Mizoroki-Heck cross-coupling reaction. Stepwise free energy of reactions for various probable reaction pathways suggest that the catalytic route has profound preference for Pd(0)-Pd(II) over Pd(II)-Pd(IV) pathway.

Inorganica Chimica Acta published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Computed Properties of 613-33-2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Kempasiddaiah, Manjunatha published the artcilePalladium-catalyzed denitrogenative cross-coupling of aryl halides with arylhydrazines under mild reaction conditions, Synthetic Route of 613-33-2, the publication is Transition Metal Chemistry (Dordrecht, Netherlands) (2021), 46(4), 273-281, database is CAplus.

A greener approach for the synthesis of various functionalized biaryl frameworks in good to excellent yield through palladium-catalyzed denitrogenative cross-coupling of aryl halides with arylhydrazines under mild reaction conditions was developed. Catalytic system was free from the aid of expensive ligands and external oxidants. Biogenically prepared palladium nanoparticles (Pd NPs) immobilized cellulose based dip catalyst displayed excellent reactivity and selectivity toward the synthesis of a broad array of sym. and unsym. biaryls through C-N bond cleavage in air as green oxidant. In addition, recyclability in denitrogenative cross-coupling reaction was also studied which showed excellent recycling performance and the dip catalyst remained stable even after several reuses. Thus, newly developed strategy was successfully applied for constructing wide-ranging functional groups tolerated biaryls using arylhydrazines and aryl halides as coupling partners which was most useful for practical applications in synthetic chem.

Transition Metal Chemistry (Dordrecht, Netherlands) published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Synthetic Route of 613-33-2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Bhattacharyya, Bagmita published the artcilePhosphonate functionalized N-heterocyclic carbene Pd(II) complexes as efficient catalysts for Suzuki-Miyaura cross coupling reaction, SDS of cas: 613-33-2, the publication is Journal of Organometallic Chemistry (2021), 122067, database is CAplus.

A N-heterocyclic carbene (NHC) ligand, L₁ bearing a pendant phosphonate ester group is used to prepare two new NHC-Pd(II) complexes, [Pd(L₁)₂I₂] (1) and [Pd(L₁)(py)I₂] (2) (py = pyridine). Hydrolysis of phosphonate ester group in 2 results another Pd(II)-NHC complex, [Pd(L₂)(py)I₂] (3) where a phosphonic acid group is attached to the NHC ligand L₂. All the three complexes are characterized by anal. and spectroscopic studies while the mol. structures of 1–2 are also determined by single crystal X-ray diffraction measurement. The catalytic efficacies of 1–3 in Suzuki-Miyaura cross coupling reactions of aryl halides and aryl boronic acid are investigated. DFT calculations were performed to decipher the role phosphonate ester or phosphonic acid substituents on the catalytic efficacy.

Journal of Organometallic Chemistry published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, SDS of cas: 613-33-2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Graves, Brian M. published the artcileComprehensive characterization of mainstream marijuana and tobacco smoke, Formula: C14H14, the publication is Scientific Reports (2020), 10(1), 7160, database is CAplus and MEDLINE.

Recent increases in marijuana use and legalization without adequate knowledge of the risks necessitate the characterization of the billions of nanoparticles contained in each puff of smoke. Tobacco smoke offers a benchmark given that it has been extensively studied. Tobacco and marijuana smoke particles are quant. similar in volatility, shape, d. and number concentration, albeit with differences in size, total mass and chem. composition Particles from marijuana smoke are on average 29% larger in mobility diameter than particles from tobacco smoke and contain 3.4 times more total mass. New measurements of semivolatile fractions determined that >97% of the mass and volume of the particles from either smoke source are comprised of semivolatile compounds For tobacco smoke and marijuana smoke, resp., 4350 and 2575 different compounds are detected, of which 670 and 536 (231 in common) are tentatively identified, and of these, 173 and 110 different compounds (69 in common) are known to cause neg. health effects through carcinogenic, mutagenic, teratogenic, or other toxic mechanisms. This study demonstrates striking similarities between marijuana and tobacco smoke in terms of their phys. and chem. properties.

Scientific Reports published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Formula: C14H14.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Hou, Jian published the artcileSystematic incorporation of gold nanoparticles onto mesoporous titanium oxide particles for green catalysts, Application In Synthesis of 613-33-2, the publication is Catalysts (2021), 11(4), 451, database is CAplus.

This report describes the systematic incorporation of gold nanoparticles (AuNPs) onto mesoporous TiO₂ (MPT) particles without strong attractive forces to efficiently serve as reactive and recyclable catalysts in the homocoupling of arylboronic acid in green reaction conditions. Unlike using nonporous TiO₂ particles and conventional SiO₂ particles as supporting materials, the employment of MPT particles significantly improves the loading efficiency of AuNPs. The incorporated AuNPs are less than 10 nm in diameter, regardless of the amount of applied gold ions, and their surfaces, free from any modifiers, act as highly reactive catalytic sites to notably improve the yields in the homocoupling reaction. The overall phys. properties of the AuNPs integrated onto the MPT particles are thoroughly examined as functions of the gold content, and their catalytic functions, including the rate of reaction, activation energy, and recyclability, are also evaluated. While the rate of reaction slightly increases with the improved loading efficiency of AuNPs, the apparent activation energies do not clearly show any correlation with the size or distribution of the AuNPs under our reaction conditions. Understanding the formation of these types of composite particles and their catalytic functions could lead to the development of highly practical, quasi-homogeneous catalysts in environmentally friendly reaction conditions.

Catalysts published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Application In Synthesis of 613-33-2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Peng, Yunfei published the artcileDecarbonylative Reductive Coupling of Aromatic Esters by Nickel and Palladium Catalyst, Quality Control of 613-33-2, the publication is Chemistry Letters (2022), 51(7), 749-753, database is CAplus.

Ni or Pd-catalyzed decarbonylative reductive couplings of aromatic esters were developed. A range of (hetero)aromatic esters was applicable to these reductive homocoupling reactions. Moreover, it was found that Pd-catalysis enables a reductive decarbonylative cross-coupling between two different aromatic esters to afford a nonsym. biaryls system.

Chemistry Letters published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Quality Control of 613-33-2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xiao, He-Xin published the artcileBulky Di(1-adamantyl)phosphinous Acid-Ligated Pd(II) Precatalysts for Suzuki Reactions of Unreactive Aryl Chlorides, Name: 4,4′-Dimethyldiphenyl, the publication is ACS Omega (2021), 6(50), 35134-35143, database is CAplus and MEDLINE.

Di(1-adamantyl)phosphine oxide (SPO-Ad: Ad₂P(V)(=O)H), a stable tautomer of di(1-adamantyl)phosphinous acid (PA-Ad: Ad₂P(III)-OH), was employed to synthesize two new PA-Ad-coordinated complexes, POPd-Ad and POPd2-Ad. POPd-Ad was easily transformed from POPd2-Ad in MeCN, and the [M – H]^– ion of the deprotonated POPd-Ad was observed in the electrospray ionization-mass spectrum of POPd2-Ad. Both complexes are effective precatalysts for the Suzuki reaction of aryl chlorides. The reduction of Pd(II) in POPd-Ad and POPd2-Ad by arylboronic acid was examined, and the ideal Pd-to-PA ratio in the Suzuki reaction is 1:1. The effect of temperature on the catalytic yields was studied to examine the possible ligation state of the active species and the dimer-to-monomer process of POPd2-Ad. Mononuclear and mono-ligated Pd species was assumed to be catalytically active. The electronic and steric effects of PA-Ad were slightly better than those reported for PA-tBu (^tBu₂P(III)-OH). D. functional theory calculations were performed to evaluate the formation of mono-ligated and mononuclear Pd species from POPd-Ad and POPd2-Ad. Also, the reaction time and catalyst loading could be reduced for the reported POPd1-tBu precatalyst using the optimized reaction conditions for POPd-Ad. The complexes synthesized in this extensive study will complement the existing SPO-coordinated POPd series of precatalysts.

ACS Omega published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C9H12O, Name: 4,4′-Dimethyldiphenyl.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lee, Junghyun published the artcileIdentification of AhR agonists in sediments of the Bohai and Yellow Seas using advanced effect-directed analysis and in silico prediction, Category: catalysis-chemistry, the publication is Journal of Hazardous Materials (2022), 128908, database is CAplus and MEDLINE.

Novel aryl hydrocarbon receptor (AhR) agonists were identified in coastal sediments in the Yellow and Bohai Seas by use of a combination of effect-directed anal. (EDA) and in silico prediction. A total of 125 sediments were screened for AhR-mediated potencies using H4IIE-luc bioassay. Great potencies were observed in organic extracts, mid-polar fraction (F2), and subfractions of F2 (F2.6-F2.9) of sediments collected from Nantong, Qinhuangdao, and Yancheng. Less than 15% AhR potencies could be explained by detected dioxin-like PAHs. Full-scan screening anal. was conducted for the more potent fractions using GC-QTOFMS to investigate the presence of unmonitored AhR agonists. A five-step prioritization strategy was applied; 92 candidate compounds satisfied all criteria. Among these chems., thirteen were evaluated for AhR efficacy. Six compounds; benz[b]anthracene, 6-methylchrysene, 2-methylbenz[a]anthracene, 1-methylbenz[a]anthracene, 1,12-dimethylbenzo[c]phenanthrene, and indeno[1,2,3-cd]fluoranthene, exhibited significant AhR-mediated efficacies. 1,12-dimethylbenzo[c]phenanthrene and indeno[1,2,3-cd]fluoranthene were identified as novel AhR agonists. Potency balance anal. showed that the six newly identified AhR agonists explained 0.4-100% of the total AhR-mediated potencies determined Overall, combining EDA and in silico prediction applied in this study demonstrated the benefits of assessing the potential toxic effects of previously unidentified AhR agonists in sediments from the coasts of China and Korea.

Journal of Hazardous Materials published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia