Category: 118-90-1

Miyamura, Hiroyuki published the artcileReaction Rate Acceleration of Cooperative Catalytic Systems: Metal Nanoparticles and Lewis Acids in Arene Hydrogenation, Product Details of C8H8O2, the publication is Angewandte Chemie, International Edition, database is CAplus and MEDLINE.

Employing two distinct catalysts in one reaction medium synergistically is a powerful strategy for activating less reactive substrates. Although the approach has been well-developed in homogeneous conditions, it remains challenging and rare in heterogeneous catalysis, especially under gas-liquid-solid multiphase reaction conditions. Here, authors describe the development of cooperative and synergistic catalyst systems of heterogeneous Rh-Pt bimetallic nanoparticle catalysts, Rh-Pt/DMPSi-Al₂O₃, and Sc(OTf)₃ in the liquid phase for the hydrogenation of arenes under very mild conditions. Dramatic rate acceleration was achieved with cooperative activation. Remarkably, more challenging substrates that contained strong electron-donating groups and sterically hindered substituents were smoothly hydrogenated. Mechanistic insights into the cooperative activation of an aromatic substrate by heterogeneous metal nanoparticles and a soluble Lewis acid was obtained by kinetic studies and by direct observation of ¹H and ⁴⁵Sc NMR spectra.

Angewandte Chemie, International Edition published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Product Details of C8H8O2.

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

Daniel, Alyssa published the artcileAbraham model correlations for solute transfer into cyclopentanone, Product Details of C8H8O2, the publication is Physics and Chemistry of Liquids, database is CAplus.

Mole fraction solubilities have been measured for anthracene, benzoic acid, 4-tert-butylbenzoic acid, 3-chlorobenzoic acid, 2-hydroxybenzoic acid, 2-methylbenzoic acid, 3-methylbenzoic acid, 3-nitrobenzoic acid and pyrene dissolved in cyclopentanone at 298.15 K using either spectrophotometric or acid-base titrimetric methods. Results of our exptl. measurements, combined with published solubility data for several inorganic and organic gases, solubility data for several important crystalline pharmaceutical intermediates and activity coefficient data taken from the published literature, were used to derive Abraham model correlations for solute transfer into anhydrous cyclopentanone solvent from both water and from the gas phase. The derived Abraham model correlations back-calculate the observed exptl. data to within 0.10 log units (or less). Reported for the first time are solute descriptor values for several important pharmaceutical intermediates.

Physics and Chemistry of Liquids published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Product Details of C8H8O2.

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

Ha, Eun Kyo published the artcilePersonal exposure to total VOC is associated with symptoms of atopic dermatitis in schoolchildren, Safety of 2-Methylbenzoic acid, the publication is Journal of Korean Medical Science (2022), 37(8), e63, database is CAplus and MEDLINE.

The urinary levels of volatile organic compound (VOC) metabolites provide individual exposure levels compared to data obtained by measuring these compounds in ambient air. We aimed to investigate the association between personal urinary concentrations of VOC metabolites and symptoms of atopic dermatitis in schoolchildren. Nine urinary VOC metabolites were analyzed from urine samples of 149 children. Diagnosis of atopic dermatitis was determined using standardized questionnaires. Pediatricians visited the schools and rated the severity of symptoms using the SCORing Atopic Dermatitis (SCORAD) in all children. Forty-five children (30.2%) had atopic dermatitis based on the International Study of Asthma and Allergies in Childhood (ISAAC) results and 35 children (23.8%) had symptoms of atopic dermatitis with pos. SCORAD index values (defined as SCORAD ¡Ý 5). Children with benzylmercapturic acid detected in personal urines were associated with presence of atopic dermatitis and pos. SCORAD index values. Children in the highest quartile of mandelic acid concentration were associated with presence of atopic dermatitis and pos. SCORAD results. Conclusion: Personal exposure to VOCs, as indicated by urinary levels of VOC metabolites, was associated with presence of atopic dermatitis and the SCORAD index value.

Journal of Korean Medical Science published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Safety of 2-Methylbenzoic acid.

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

Nagy, Bence S. published the artcileN-Hydroxyphthalimide Catalyzed Aerobic Oxidation of Aldehydes under Continuous Flow Conditions, Synthetic Route of 118-90-1, the publication is Advanced Synthesis & Catalysis (2022), 364(12), 1998-2008, database is CAplus.

The efficacy of synthetic methodologies is based not only on potent chemistries but also on processing strategies that amplify reaction performance and overall safety. The N-hydroxyphtalimide-catalyzed aerobic oxidation of aldehydes is an environmentally reliable and inexpensive approach for the synthesis of valuable carboxylic acids. However, the reaction may lead to the accumulation of significant amounts of peracid in crude product mixtures thereby generating a considerable safety hazard. Also, in the case of deactivated substrates, long reaction times, high catalyst loading, and stoichiometric additives are required to promote oxidation Therefore, we developed a flow chem.-based process for N-hydroxyphtalimide-catalyzed aldehyde oxidations and exploited its benefits to minimize peracid buildup, thereby enhancing the process safety. By performing the aerobic oxidation of aldehydes under continuous flow conditions, chem. intensified and scalable carboxylic acid formation was obtained even in the reactions of deactivated substrates.

Advanced Synthesis & Catalysis published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Synthetic Route of 118-90-1.

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

Zahra Alizadeh, Seyedeh published the artcileFrom Deep Eutectic Solvents to Nitrogen-rich Ordered Mesoporous Carbons: A Powerful Host for the Immobilization of Palladium Nanoparticles in the Aerobic Oxidation of Alcohols, Formula: C8H8O2, the publication is ChemCatChem (2022), 14(8), e202101621, database is CAplus.

The preparation of a nitrogen-rich ordered mesoporous carbon (DNOMC) with three-dimensional cubic structure was established via carbonization of a green, inexpensive and safe deep eutectic solvent consisting of choline chloride salt and D-glucose in the presence of KIT-6 template for the first time. The materials were characterized by TEM, N₂ adsorption-desorption anal., XPS, TGA, CHN, and FT-IR. The DNOMC was shown to be a powerful support for the immobilization of palladium nanoparticles. The Pd@DNOMC catalyst exhibited high activity in the selective aerobic oxidation of various activated and non-activated primary and secondary benzylic as well as linear and cyclic aliphatic alcs. to the corresponding carboxylic acids RCOOH [R = hexyl, Ph, 4-MeC₆H₄, etc.] and ketones R¹C(O)R² [R¹ = Me, Ph; R² = Me, pentyl, hexyl; R¹R² = (CH₂)₆, (CH₂)₇] in pure water under mol. oxygen. The catalyst system could successfully be reused at least ten times without any significant decrease in either activity or selectivity. It was worth noting that, the hot filtration strongly showed that the catalyst worked in a boomerang-type catalyst pathway.

ChemCatChem published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is 0, Formula: C8H8O2.

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

Li, Yue published the artcileComparative analysis of floral scent profiles between two Chimonanthus praecox plants under different rhythms and blooming stages, SDS of cas: 118-90-1, the publication is Scientia Horticulturae (Amsterdam, Netherlands) (2022), 111129, database is CAplus.

Chimonanthus praecox is an economically important ornamental plant species native to China. It is known for its winter-season flowering times and strong fragrances. Floral fragrances vary with different circadian rhythms. Despite many studies examining the circadian-rhythm-based changes in floral fragrance, limited information is available about the floral fragrance of C. praecox with circadian rhythms. In this study, headspace solid-phase microextraction gas chromatog.-mass spectrometry was used to identify the floral scent compounds in var. grandiflorus and var. intermedius from Yunnan, China. In total, 69 volatile compounds, which were largely acids, alcs., esters, aromatic compounds, terpenes, aldehydes, and ketones, were identified and the most predominant compounds were alcs. Compounds m-xylene, p-xylene, 2-norbornanemethanol, o-xylene, cyclohepta-1,3,5-triene, germacrene D, ethylbenzene and 3,4-dimethoxycinnamic acid contributed to the floral scent of C. praecox. While var. grandiflorus and var. intermedius flowers contained about the same number of floral scent compounds (53 and 52, resp.), their compositions varied greatly. Furthermore, hierarchical cluster anal. based on the main compounds in var. grandiflorus and var. intermedius with different circadian rhythms indicated that opened flowers had similar compounds while unopened flowers had different ones. In addition, the amounts and contents of floral scent compounds between the two C. praecox varieties were affected differently by temperature, humidity and light intensity. Our findings will contribute to the exploration of the biosynthesis and emission mechanisms of floral scent compounds in C. praecox.

Scientia Horticulturae (Amsterdam, Netherlands) published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, SDS of cas: 118-90-1.

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

Ramesh, Balu published the artcileRu(II)- or Rh(III)-Catalyzed Annulation of Aromatic/Vinylic Acids with Alkylidenecyclopropanes via C-H Activation, Name: 2-Methylbenzoic acid, the publication is Journal of Organic Chemistry (2022), 87(9), 5668-5681, database is CAplus and MEDLINE.

An efficient and new route for the synthesis of (E)-4-benzylideneisochroman-1-ones I [R¹ = 6-Me, 7-Cl, 8-MeO, etc.; Ar = Ph, 4-ClC₆H₄, 3-BrC₆H₄, etc.] through tandem cascade annulation of benzoic acids with alkylidenecyclopropanes using Ru(II) as a catalyst was demonstrated. It was important to note that the reaction delivers selectively E-stereoselective 4-benzylideneisochroman-1-one derivatives in moderate to good yields, which had completely diverse selectivity as compared with previous methods. Further, the annulation was explored with less-reactive ¦Â C-H activation of vinylic acids with alkylidenecyclopropanes, leading to the highly useful ¦Á-pyrone derivatives II [R³ = Me, CF₃, Ph, Bn; Ar= Ph, 3-MeC₆H₄, 4-ClC₆H₄, 4-BrC₆H₄] in the presence of an Rh(III) catalyst.

Journal of Organic Chemistry published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Name: 2-Methylbenzoic acid.

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

Naskar, Gouranga published the artcileLigand-Enabled [3+2] Annulation of Aromatic Acids with Maleimides by C(sp³)-H and C(sp²)-H Bond Activation, Application of 2-Methylbenzoic acid, the publication is Chemistry – A European Journal (2022), 28(39), e202200778, database is CAplus and MEDLINE.

Synthesis of tricyclic heterocyclic mols. I [R = 5-F, 5-Me, 5-CF₃, etc.; R¹ = Me, Et, Bn, etc.] with a free carboxylic group in a high atom- and step-economical manner via palladium-catalyzed [3+2] annulation of substituted benzoic acids with maleimides was described. The reaction proceeded via a dual C-H bond activation such as C(sp³)-H at the benzylic position and C(sp²)-H bond activation at the meta position of substituted aromatics An external ligand (MPAA) was crucial for the success of present protocol. Further, the decarboxylation and esterification of the free carboxylic acid group of observed products were carried out.

Chemistry – A European Journal published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Application of 2-Methylbenzoic acid.

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

Cai, Sophia K. published the artcileDevelopment of Abraham model correlations for solute transfer into cyclopentanol from both water and the gas phase based on measured solubility ratios, Application In Synthesis of 118-90-1, the publication is Physics and Chemistry of Liquids (2022), 60(2), 287-296, database is CAplus.

Exptl. mole fraction solubilities are reported for acenaphthene, benzoin, salicylamide, o-acetoacetanisidide, benzoic acid, 4-chlorobenzoic acid, 3,4-dichlorobenzoic acid, 4-methoxybenzoic acid, 3,4-dimethoxybenzoic acid, 2-hydroxybenzoic acid, 2-methylbenzoic acid, 3-methylbenzoic acid and 4-nitrobenzoic acid dissolved in cyclopentanol at 298.15 K. Results of exptl. measurements, combined with published solubility data and activity coefficient data taken from the published literature, were used to derive Abraham model correlations for solute transfer into anhydrous cyclopentanol solvent from both water and from the gas phase. The derived Abraham model correlations back-calculate the observed exptl. data to within 0.11 log units (or less).

Physics and Chemistry of Liquids published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Application In Synthesis of 118-90-1.

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

Cui, Liu published the artcileRuthenium(II) complexes bearing chelating Carboxylate-anchored normal and abnormal Carbenes: Synthesis, characterizations and catalytic applications, Related Products of catalysis-chemistry, the publication is Polyhedron (2022), 115593, database is CAplus.

Functionalized abnormal/mesoionic NHC (NHC = N-heterocyclic carbene) complexes have been much less investigated in contrast to their normal NHC counterparts. In this work, a series of [C_carbene?_carboxylate]- and [C_carbene?’_phenyl]-type Ru(II) complexes bearing normal and abnormal NHCs have been synthesized. Their spectroscopic features, solid-state structure and aquation reactivity have also been reported. All the as-synthesized complexes have served as precatalysts to catalyze intramol. or intermol. carboxylic acid-to-alkyne addition reactions. It was found that the catalytic behavior of abnormal NHC complexes is superior to that of the normal NHC analogs. An anti-Markovnikov addition reactivity, leading to the formation of an E-type enol ester as the major product, was observed A few stoichiometric experiments have also been carried out to provide preliminary insight into the catalytic mechanism.

Polyhedron published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Related Products of catalysis-chemistry.

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