Tag: 100-200

On January 5, 2020, Blanco, Elodie; Rosenkranz, Andreas; Espinoza-Gonzalez, Rodrigo; Fuenzalida, Victor M.; Zhang, Zhenyu; Suarez, Sebastian; Escalona, Nestor published an article.Quality Control of 2-Methylanisole The title of the article was Catalytic performance of 2D-Mxene nano-sheets for the hydrodeoxygenation (HDO) of lignin-derived model compounds. And the article contained the following:

2D Mxene nanosheets (Ti3C2Tx) were investigated for the hydrodeoxygenation of guaiacol as a lignin-derived model compound The catalyst was characterized by TEM, XPS, Raman spectroscopy and TPR. The acid-base properties were measured by TPD-NH3 and TPRe-MeOH. Phenol was the main product obtained, and methylanisole was observed as the second main product. The study of Anisole conversion shows that methylanisole was likely obtained by a bimol. transalkylation. Such formation, which has only been reported over acid catalysts, was associated to the combined action of acid-base pairs identified. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).Quality Control of 2-Methylanisole

The Article related to catalyst nanosheet titanium carbide hydrodeoxygenation guaiacol lignin, Cellulose, Lignin, Paper, and Other Wood Products: Lignin and other aspects.Quality Control of 2-Methylanisole

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Zeng, Xu; Akiyama, Takuya; Yokoyama, Tomoya; Matsumoto, Yuji published an article in 2020, the title of the article was Contribution of the γ-hydroxy group to the β-O-4 bond cleavage of lignin model compounds in a basic system using tert-butoxide.HPLC of Formula: 91-16-7 And the article contains the following content:

The most common non-phenolic β-O-4-type lignin model compounds with or without the γ-hydroxymethyl group (C6-C3- or C6-C2-type, resp.) were treated in a 0.5 mol/L potassium tert-butoxide in DMSO solution at 30°C to examine the effects of presence of the group. The β-O-4 bond of the C6-C3-type cleaved more rapidly than the C6-C2-type, indicating that the γ-hydroxy group contributes to the cleavage, in contrast to their reactions in alk. pulping processes. Furthermore, the β-O-4 bond of the threo isomer of the C6-C3-type cleaved more rapidly than that of the erythro isomer. This result can be attributed to the fact that the erythro isomer has the hydrogen bond between a generated alkoxide and the other hydroxy group at its α- and γ-positions in its most-preferential conformer, interfering with the β-O-4 bond cleavage. It was also suggested in treatments of their methyl-etherified derivatives at the α- or γ-hydroxy group that the contribution of the γ-hydroxy group of the threo isomer is greater than that of the erythro isomer. Detailed examination of the distribution profile of reaction products supported this greater contribution of the γ-hydroxy group of the threo isomer. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).HPLC of Formula: 91-16-7

The Article related to lignin model compound potassium tertiary butoxide bond cleavage, Cellulose, Lignin, Paper, and Other Wood Products: Lignin and other aspects.HPLC of Formula: 91-16-7

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kusumoto, Shuhei; Kishino, Masamichi; Nozaki, Kyoko published an article in 2020, the title of the article was Cleavage of C-C and C-O Bonds in β-O-4 Linkage of Lignin Model Compound by Cyclopentadienone Group 8 and 9 Metal Complexes.COA of Formula: C8H10O2 And the article contains the following content:

Degradation of 1-(3,4-dimethoxyphenyl)-2-(2-methoxyphenoxy)propane-1,3-diol (1), a model compound for lignin β-O-4 linkage was examined with iron, ruthenium, rhodium and iridium complexes bearing cyclopentadienone ligand. Cyclopentadienone iron complex gave only a small amount of degraded product with reduced mol. weight Cyclopentadienone ruthenium complex, so called Shvo’s catalyst, afforded 3,4-dimethoxybenzaldehyde (a3) in 14.3% yield after Cα-Cβ bond cleavage. On the other hand, cyclopentadienone group-9 metal complexes catalyzed Cβ-O bond cleavage to afford guaiacol (b1) as a main product in up to 74.9% yield. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).COA of Formula: C8H10O2

The Article related to lignin metal ligand cooperation retro aldol reaction, Cellulose, Lignin, Paper, and Other Wood Products: Lignin and other aspects.COA of Formula: C8H10O2

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Verevkin, Sergey P.; Turovtsev, Vladimir V.; Andreeva, Irina V.; Orlov, Yurij D.; Pimerzin, Aleksey A. published an article in 2021, the title of the article was Webbing a network of reliable thermochemistry around lignin building blocks: tri-methoxy-benzenes.Formula: C8H10O And the article contains the following content:

Methoxy-substituted benzenes are the simplest fragments from the lignin separation feedstock. Extensive exptl. thermochem. studies of these compounds were carried out, including vapor pressure measurements, combustion and differential scanning calorimetry. These data were evaluated using empirical, semi-empirical and quantum chem. methods. The consistent sets of evaluated thermodn. data were used to design the method for predicting enthalpies of vaporization and enthalpies of formation of di- and tri-substituted benzenes. It has been found that the agglomeration of substituents on the benzene ring has dramatic consequences for the energetics of the mol. (in terms of the enthalpy of formation), as well as for the energetics of intermol. interactions (in terms of the enthalpy of vaporization). These observations are essential to reliably assess the energetics of the mols. that appear in reaction products of lignin transformations in value-adding chems. and materials. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).Formula: C8H10O

The Article related to lignin building block thermochem, Cellulose, Lignin, Paper, and Other Wood Products: Lignin and other aspects.Formula: C8H10O

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On July 31, 2021, Wong, Warren H. L.; Gries, Regine M.; Abram, Paul K.; Alamsetti, Santosh K.; Gries, Gerhard published an article.Electric Literature of 578-58-5 The title of the article was Attraction of Brown Marmorated Stink Bugs, Halyomorpha halys, to Blooming Sunflower Semiochemicals. And the article contained the following:

The polyphagous invasive brown marmorated stink bug, Halyomorpha halys, reportedly discriminates among phenol. stages of host plants. To determine whether olfaction is involved in host plant stage discrimination, we selected (dwarf) sunflower, Helianthus annuus, as a model host plant species. When adult females of a still-air laboratory experiment were offered a choice of four potted sunflowers at distinct phenol. stages (vegetative, pre-bloom, bloom, seeding), most females settled onto blooming plants but oviposited evenly on plants of all four stages. In moving-air two-choice olfactometer experiments, we then tested each plant stage vs. filtered air and vs. one another, for attraction of H. halys females. Blooming sunflowers performed best overall, but no one plant stage was most attractive in all experiments Capturing and analyzing (by GC-MS) the headspace odorants of each plant stage revealed a marked increase of odorant abundance (e.g., monoterpenes) as plants transitioned from pre-bloom to bloom. Analyzing the headspace odorant blend of blooming sunflower by gas chromatog.-electroantennog. detection (GC-EAD) revealed 13 odorants that consistently elicited responses from female H. halys antennae. An 11-component synthetic blend of these odorants attracted H. halys females in laboratory olfactometer experiments Furthermore, in field settings, the synthetic blend enhanced the attractiveness of synthetic H. halys pheromone as a trap lure, particularly in spring (Apr. to mid-June). A simpler yet fully effective sunflower semiochem. blend could be developed and coupled with synthetic H. halys aggregation pheromones to improve monitoring efforts or could improve the efficacy of modified attract-and-kill control tactics for H. halys. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).Electric Literature of 578-58-5

The Article related to halyomorpha halys blooming sunflower semiochem, gc-ead, gc–ms, olfactometer bioassays, pentatomidae, plant phenology, plant volatile compounds, Agrochemical Bioregulators: Methods (Including Analysis) and other aspects.Electric Literature of 578-58-5

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Jiang, Yihui; Wang, Chunlan; Ma, Nana; Chen, Jie; Liu, Chuanfei; Wang, Fang; Xu, Jiakun; Cong, Zhiqi published an article in 2020, the title of the article was Regioselective aromatic O-demethylation with an artificial P450BM3 peroxygenase system.Electric Literature of 578-58-5 And the article contains the following content:

Several simple single- and double-mutants of cytochrome P450BM3 enzymes enabled a highly regioselective O-demethylation of aromatic ethers with H2O2 with the assistance of a dual-functional small mol. (DFSM). The DFSM-facilitated P450BM3 peroxygenase system provides an alternative, simple approach for a key step in the bioconversion of lignin compared with reported NADPH-dependent P 450 monooxygenases. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).Electric Literature of 578-58-5

The Article related to regioselective aromatic o demethylation engineering cytochrome p450bm3 peroxygenase, Fermentation and Bioindustrial Chemistry: Macromolecules and other aspects.Electric Literature of 578-58-5

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On July 6, 2020, Pfister, Patrick; Smith, Benjamin C.; Evans, Barry J.; Brann, Jessica H.; Trimmer, Casey; Sheikh, Mushhood; Arroyave, Randy; Reddy, Gautam; Jeong, Hyo-Young; Raps, Daniel A.; Peterlin, Zita; Vergassola, Massimo; Rogers, Matthew E. published an article.Category: ethers-buliding-blocks The title of the article was Odorant Receptor Inhibition Is Fundamental to Odor Encoding. And the article contained the following:

Most natural odors are complex mixtures of volatile components, competing to bind odorant receptors (ORs) expressed in olfactory sensory neurons (OSNs) of the nose. To date, surprisingly little is known about how OR antagonism shapes neuronal representations in the detection layer of the olfactory system. Here, we investigated its prevalence, the degree to which it disrupts OR ensemble activity, and its conservation across phylogenetically related ORs. Calcium imaging microscopy of dissociated OSNs revealed significant inhibition, often complete attenuation, of responses to indole – a commonly occurring volatile associated with both floral and fecal odors-by a set of 36 tested odorants. To confirm an OR mechanism for the observed inhibition, we performed single-cell transcriptomics on OSNs exhibiting specific response profiles to a diagnostic panel of odorants and identified three paralogous receptors – Olfr740, Olfr741, and Olfr743 – which, when tested in vitro, recapitulated OSN responses. We screened ten ORs from the Olfr740 gene family with âˆ?00 perfumery-related odorants spanning a range of chem. scaffolds and functional groups. Over half of these compounds (430) antagonized at least one of the ten ORs. OR activity fitted a math. model of competitive receptor binding and suggests normalization of OSN ensemble responses to odorant mixtures is the rule rather than the exception. In summary, we observed OR antagonism occurred frequently and in a combinatorial manner. Thus, extensive receptor-mediated computation of mixture information appears to occur in the olfactory epithelium prior to transmission of odor information to the olfactory bulb. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Category: ethers-buliding-blocks

The Article related to odor odorant receptor inhibition olfactory epithelium, g protein-coupled, antagonism, odor mixtures, odorant, olfaction, receptor, sensory neurons, Mammalian Biochemistry: General Physiological Chemistry and other aspects.Category: ethers-buliding-blocks

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On January 17, 1997, Commercon, Alain; Lebrun, Alain; Mailliet, Patrick; Peyronel, Jean Francois; Sounigo, Fabienne; Truchon, Alain; Zucco, Martine; Cheve, Michel published a patent.SDS of cas: 81616-80-0 The title of the patent was New benzisoindole derivatives as inhibitors of farnesyl transferase, their preparation, and pharmaceutical compositions containing them.. And the patent contained the following:

Title compounds I [R = (un)substituted (CH2)mX1(CH2)nZ; X1 = bond, O, S; m = 0-1; n = 0-2; Z = CO2H, alkoxycarbonyl, (un)substituted carbamoyl, etc.; R1, R2 = H, halo, alkyl, (un)substituted alkoxy; or R1R2 form (un)saturated heterocycle; or R2 forms dimer via disulfide bridge; R3 = H, halo, alkyl, alkenyl, alkoxy, alkylthio; X = O, S, NH, CO, CH2, CH2CH2, alkylene, 1,1-cycloalkanediyl; Y = O, S], in racemic form or as optical isomers, are claimed. The compounds are inhibitors of farnesyl transferase, and show marked antitumor and antileukemic properties. For example, cis-3,6-diphenyl-1,4-cyclohexadienecarboxylic acid Me ester (preparation given) reacted with PhCH2N(CH2OBu)(CH2SiMe3) in refluxing CF3CO2H to give the intermediate hexahydroisoindole derivative II.HCl, which was further cyclized by CF3SO3H at 5-20�to give the benz[f]isoindole intermediate III. This was then converted in 3 steps to title compound IV. In an assay for inhibition of farnesyl transferase, IV had an IC50 of 0.31 渭M. The experimental process involved the reaction of (S)-2-(2-Methoxyphenyl)propanoic acid(cas: 81616-80-0).SDS of cas: 81616-80-0

The Article related to benzisoindole preparation farnesyl transferase inhibitor antitumor, Heterocyclic Compounds (One Hetero Atom): Indoles, Indolizines, Carbazoles, and Other Arenopyrroles and other aspects.SDS of cas: 81616-80-0

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On April 30, 2022, Ali, Hadi; Vandevyvere, Tom; Lauwaert, Jeroen; Kansal, Sushil Kumar; Saravanamurugan, Shunmugavel; Thybaut, Joris W. published an article.Quality Control of 2-Methylanisole The title of the article was Impact of oxygen vacancies in Ni supported mixed oxide catalysts on anisole hydrodeoxygenation. And the article contained the following:

The hydrodeoxygenation (HDO) activity of anisole has been investigated over Ni catalysts on mixed metal oxide supports containing Nb-Zr and Ti-Zr in 1:1 and 1:4 ratios. XRD patterns indicate the incorporation of Ti (or Nb) into the ZrO2 framework. XPS and oxygen pulse chemisorption analyses reveal that Ni/Ti1Zr4 and Ni/Nb1Zr4 possessed more oxygen vacancy sites than Ni/Ti1Zr1 and Ni/Nb1Zr1, resp. Correspondingly, the HDO activity of Ni/Ti1Zr4 and Ni/Nb1Zr4 was higher with an anisole conversion up to 30.7 and 34.4%, with high selectivity towards benzene (up to 64.7 and 63.3%), compared to corresponding Ni/Ti1Zr1 and Ni/Nb1Zr1 catalysts. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).Quality Control of 2-Methylanisole

The Article related to oxygen nickel supported oxide catalyst anisole hydrodeoxygenation, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Quality Control of 2-Methylanisole

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On September 15, 2021, Siccama, Joanne W.; Pegiou, Eirini; Eijkelboom, Nienke M.; Zhang, Lu; Mumm, Roland; Hall, Robert D.; Schutyser, Maarten A. I. published an article.COA of Formula: C8H10O2 The title of the article was The effect of partial replacement of maltodextrin with vegetable fibres in spray-dried white asparagus powder on its physical and aroma properties. And the article contained the following:

Asparagus concentrate was spray-dried in different carrier formulations in which maltodextrin was partially replaced by cellulose-based carriers, i.e. asparagus fiber, citrus fiber or microcrystalline cellulose. This replacement was limited to a maximum level of 3% weight/weight for asparagus and citrus fibers, and 10% weight/weight for microcrystalline cellulose, due to fiber insolubility and increased viscosity of the feed. Powders obtained from feed solutions with an initial solids content of 40% weight/weight showed better phys. properties and aroma retention than 30% weight/weight Partial replacement of maltodextrin by cellulose-based carriers resulted in powders with similar phys. properties as the control and did not detrimentally influence the aroma profiles as analyzed by headspace solid-phase microextraction and gas chromatog.-mass spectrometry. This research shows that fiber obtained from asparagus waste streams could potentially be used as a carrier to produce spray-dried asparagus powder with retained key asparagus volatiles such as 2-methoxy-3-iso-Pr pyrazine. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).COA of Formula: C8H10O2

The Article related to maltodextrin vegetable fiber asparagus spray drying aroma, asparagus fibres, gc–ms, maltodextrin, metabolomics, spray drying, volatiles retention, Food and Feed Chemistry: Fruits, Vegetables, Legumes, and Nuts and other aspects.COA of Formula: C8H10O2

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem