Month: September 2022

Recommanded Product: 119-47-1《Preparation of a Coal-Based MoS₂/SiO₂/GO Composite Catalyst and Its Performance in the Photocatalytic Degradation of Wastewater and Hydrogen Production》 was published in 2022. The authors were Sun, Jinyan;Maimaiti, Halidan;Zhai, Peishuai;Zhang, Haizheng;Feng, Lirong;Bao, Jianzhao;Zhao, Xuwei, and the article was included in《Langmuir》. The author mentioned the following in the article:

Photocatalytic degradation of wastewater and the simultaneous production of hydrogen (H₂) is a green and efficient method to solve energy and environmental problems. In this paper, coal-based SiO₂/GO with a stable structure was prepared by a modified Hummers oxidation method, and then, a lotus-shaped composite photocatalyst, MoS₂/SiO₂/GO, was prepared by in situ loading of flower cluster MoS₂ from sodium molybdate reduction onto SiO₂/GO. Its photocatalytic degradation of wastewater and H₂ production properties were investigated while characterizing the material structure. The results show that SiO₂/GO as a carrier not only ensures adequate dispersion of MoS₂ but also enhances the visible-light response of the composite catalyst. In addition, it can also hinder the recombination of photogenerated electrons and holes in MoS₂ and act as an electron transport channel in composite catalysts. MoS₂/SiO₂/GO exhibits much higher photocatalytic degradation of wastewater and H₂ production capacity than MoS₂: after 180 min of reaction, the CODcr removal of wastewater increased from 45.6% for MoS₂ to 84.2% for MoS₂/SiO₂/GO and the H₂ yield reached 233.4μmol. The goal of degrading wastewater while producing H₂ more economically has been tentatively achieved, although not to the extent required for industrialization. The experimental procedure involved many compounds, such as 2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) .

Recommanded Product: 119-47-12,2′-Methylenebis(4-methyl-6-tert-butylphenol)(CAS: 119-47-1) is a natural product found in Streptomyces and Aspergillus fumigatus .

Reference:
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Recommanded Product: 110-03-2《Selective deoxygenative alkylation of alcohols via photocatalytic domino radical fragmentations》 was published in 2021. The authors were Guo, Hong-Mei;Wu, Xuesong, and the article was included in《Nature Communications》. The author mentioned the following in the article:

A one-pot strategy for deoxygenative Giese reaction of alcs. with electron-deficient alkenes, by using xanthate salts as alc.-activating groups for radical generation under visible-light photoredox conditions in the presence of triphenylphosphine were reported. The convenient generation of xanthate salts and high reactivity of sequential C-S/C-O bond homolytic cleavage enable efficient deoxygenation of primary, secondary and tertiary alcs. with diverse functionality and structure to generate the corresponding alkyl radicals, including Me radical. Moreover, chemoselective radical monodeoxygenation of diols was achieved via selective formation of xanthate salts.2,5-Dimethyl-2,5-hexanediol (cas: 110-03-2) were involved in the experimental procedure.

2,5-Dimethyl-2,5-hexanediol(cas:110-03-2) on heteropoly acid catalyzed dehydration yields cyclic ethers via stereospecific intramolecular SN2 mechanism. It reacts with nitriles in concentrated sulfuric acid to yield Δ1-pyrrolines.Recommanded Product: 110-03-2

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Li, Shuying;Hu, Tiantian;Bertotto, Luisa Becker;Jiang, Yao;Gui, Wenjun;Schlenk, Daniel published 《Pesticide and Surfactant Mixtures Alter Sexual Differentiation in Japanese Medaka (Oryzias latipes)》 in 2021. The article was appeared in 《ACS ES&T Water》. They have made some progress in their research.Product Details of 140-66-9 The article mentions the following:

Effects-directed analyses of water extracts from the San Francisco Bay Delta of California using estrogenic activity indicated that the pesticides, bifenthrin, and diuron, as well as alkylphenol surfactants, were observed in active fractions. To determine whether the estrogenic activity of the mixture had any impacts on sexual development, Japanese medaka (Oryzias latipes) embryos were exposed to an ambient concentration of the compounds, individually and as mixtures, using components of the US Environmental Protection Agency (USEPA), Endocrine Disruptor Screening Program, and Organization for Economic Co-operation and Development (OECD) assay. In medaka exposed to diuron, or surfactants alone, the percentages of phenotypic females were 88.9 ± 19.2% and 66.4 ± 3.8%, resp. When diuron was combined with surfactants, 93.3 ± 5.8% of the animals were female. To evaluate whether phenotypic females were changed from genetically male animals, the expression of the male-specific gene (DMY) was measured in animals following treatment. Treatments with ambient concentrations of surfactants and diuron had animals with higher percentages (78 ± 19%) of phenotypic females that were derived from genotypic males. Our results demonstrated that mixtures of pesticides and surfactants may alter sexual development after embryonic exposure in fish.4-tert-Octylphenol (cas: 140-66-9) were involved in the experimental procedure.

4-tert-Octylphenol(cas: 140-66-9) is a common environmental pollutant showing weak estrogenic effects.Product Details of 140-66-9 It has been shown to cause harm to vertebrate male reproductive systems.

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Tang, Xiaowen;Luo, Xiang;Su, Qiong;Wei, Gaofei;Meng, Shan-Shui;Chan, Albert S. C. published 《Chemoselective dual functionalization of phenols via relay catalysis of borane with different forms》 in 2021. The article was appeared in 《CCS Chemistry》. They have made some progress in their research.Application In Synthesis of 4-(2-Phenylpropan-2-yl)phenol The article mentions the following:

A highly efficient and chemoselective dual functionalization of unprotected phenols with α- or β- hydroxyl acids was presented. A variety of valuable benzofuranones and dihydrocoumarins were delivered in moderate to high yields. D. functional theory (DFT) calculations and control experiments indicated that an untypical Friedel-Crafts alkylation and the subsequent lactonization were catalyzed by the Lewis acid form and the Bronsted acid form of borane, resp. Gram-scale experiments and late-stage functionalization of complex mols. were performed to highlight the utility of this reaction. And 4-(2-Phenylpropan-2-yl)phenol (cas: 599-64-4) was used in the research process.

4-(2-Phenylpropan-2-yl)phenol(cas:599-64-4) is a natural product found in Panax ginseng.Application In Synthesis of 4-(2-Phenylpropan-2-yl)phenol 4-(2-Phenylpropan-2-yl)phenol is a useful reagent for preparing and characterizing aromatic polyphosphonates as high refractive index polymers.

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Category: alcohols-buliding-blocksIn 1985, Benecky, Michael J.;Copeland, Robert A.;Hays, Thomas R.;Lobenstine, Eric W.;Rava, Richard P.;Pascal, Robert A. Jr.;Spiro, Thomas G. published 《Resonance Raman spectroscopy of pyridoxal Schiff bases》. 《Journal of Biological Chemistry》published the findings. The article contains the following contents:

Resonance Raman (RR) spectra are reported for amino acid and amine adducts of pyridoxal 5′-phosphate (PLP) and 5′-deoxypyridoxal (5′-dPL) in aqueous solution For the valine adducts, a detailed study was carried out on solutions at pH and pD 5, 9, and 13, values at which the pyridine and imine protons are successively ionized, and on the adducts formed from [¹⁵N]valine, α-deuterovaline, and N-methyl-PLP. Good quality spectra were obtained, despite the strong fluorescence of pyridoxal Schiff bases, by adding KI as a quencher, and by exciting the mols. on the blue side of their absorption bands: 406.7 nm (cw K⁺ laser) for the pH 5 and 9 species (λ_max = 409 and 414 nm), and 354.7 nm (pulsed YAG laser, 3rd harmonic) for the pH 13 species (λ_max = 360 nm). A prominent band at 1646 cm^-1 was assigned to the imine C:N stretch via its 13 cm^-1 15N shift. A 12 cm^-1 downshift of the band in D₂O confirmed that the Schiff base linkage is protonated at pH 9. Deprotonation at pH 13 shifted ν_C:N from 1646 to 1629 cm^-1, values typical of conjugated Schiff bases. The strongest band in the spectrum, at 1338 cm^-1, shifted to 1347 cm^-1 upon pyridine protonation at pH 5, and was assigned to a ring mode with a large component of phenolate C-O stretch. A shoulder on its low-frequency side was assigned to the C4-C4′ stretch. Large enhancements of these modes could be understood qual. in terms of the dominant resonance structures contributing to the ground and resonant excited states. A number of weaker bands were observed, and assigned to pyridine ring modes. These modes gained significantly in intensity, and the exocyclic modes diminished, when the spectra were excited at 266 nm (YAG laser, 4th harmonic) in resonance with ring-localized electronic transitions. The experimental procedure involved many compounds, such as 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride (cas: 148-51-6) .

5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride(cas:148-51-6 Category: alcohols-buliding-blocks) is a vitamin B6 antimetabolite with diverse biological activities. It inhibits transport of pyridoxine , pyridoxal, and pyridoxamine in and reduces growth of S. carlsbergensis cells. DOP inhibits sphingosine-1-phosphate (S1P) lyase and reduces cyclic stretch-induced apoptosis in alveolar epithelial MLE-12 cells.

Reference:
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Liu, Xufang;Rong, Xianle;Liu, Shihan;Lan, Yu;Liu, Qiang published 《Cobalt-Catalyzed Desymmetric Isomerization of Exocyclic Olefins》. The research results were published in《Journal of the American Chemical Society》 in 2021.COA of Formula: C15H16O The article conveys some information:

Chiral cyclic olefins, 1-methylcyclohexenes, are versatile building blocks for the synthesis of pharmaceuticals and natural products. Despite the prevalence of these structural motifs, the development of efficient synthetic methods remains an unmet challenge. Herein the authors report a novel desym. isomerization of exocyclic olefins using a series of newly designed chiral cobalt catalysts, which enables a straightforward construction of chiral 1-methylcyclohexenes with diversified functionalities. The synthetic utility of this methodol. is highlighted by a concise and enantioselective synthesis of a natural product, β-bisabolene. The versatility of the reaction products is further demonstrated by multifarious derivatization. To complete the study, the researchers used 4-(2-Phenylpropan-2-yl)phenol (cas: 599-64-4) .

4-(2-Phenylpropan-2-yl)phenol(cas:599-64-4) is a natural product found in Panax ginseng.COA of Formula: C15H16O 4-(2-Phenylpropan-2-yl)phenol is a useful reagent for preparing and characterizing aromatic polyphosphonates as high refractive index polymers.

Reference:
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Name: 2-Hexyl-1-decanol《Plant extracts effectiveness to extend bison meat shelf life》 was published in 2020. The authors were Sood, Vipasha;Tian, Wenchao;Narvaez-Bravo, Claudia;Arntfield, Susan D.;Gonzalez, Argenis Rodas, and the article was included in《Journal of Food Science》. The author mentioned the following in the article:

The effectiveness of plant extracts (0.05% rosemary and 0.08% oregano) to extend shelf life of bison strip loin steaks in terms of color stability and consumer acceptability was studied. Steaks treated with oregano presented lower oxygen consumption, higher metmyoglobin-reducing activity (MRA), decreased lipid oxidation, and provided a stable red color with less discoloration during the retail display period than the control and rosemary treated steaks (P < 0.05). Results from consumer sensory evaluation indicated that treated steaks under study were not significantly different from the control (P > 0.05) based on palatability attributes and acceptability. However, rosemary treated steaks were more desirable and palatable than their oregano counterparts (P < 0.05). Overall, plant extracts, particularly oregano, can improve color stability of bison steaks due to its antioxidants properties and ability to increase MRA capacity in fresh bison meat without posing any neg. impact on its sensory attributes. Practical Application : This study will provide valuable information to the bison meat industry on how to offer a more consistent and acceptable product (in terms of palatability and color) to consumers using plant-based natural antioxidants, without diminishing the palatability of their products. This technol. can offer two more days of shelf life in retail overwrap packaging, consequently, opening the possibility for the bison industry to expand its market with a potential to reduce retail losses due to poor color stability and early browning (i.e., stock out, markdowns, and waste due to expired display life). And 2-Hexyl-1-decanol (cas: 2425-77-6) was used in the research process.

2-Hexyl-1-decanol(cas: 2425-77-6) may be employed as an organic solvent to study the extraction of non-polar acidic drugs from human plasma by parallel artificial liquid membrane extraction (PALME). Name: 2-Hexyl-1-decanol

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Related Products of 224434-01-9《Chiral Alkyl Amine Synthesis via Catalytic Enantioselective Hydroalkylation of Enecarbamates》 was published in 2021. The authors were Qian, Deyun;Bera, Srikrishna;Hu, Xile, and the article was included in《Journal of the American Chemical Society》. The author mentioned the following in the article:

A nickel-catalyzed hydroalkylation method to assemble a wide range of chiral alkyl amines from enecarbamates (N-Cbz-protected enamines) and alkyl halides with high regio- and enantioselectivity was reported. The method works for both nonactivated and activated alkyl halides and was able to produce enantiomerically enriched amines with two minimally differentiated α-alkyl substituents. The mild conditions led to high functional group tolerance, which is demonstrated in the postproduct functionalization of many natural products and drug mols., as well as the synthesis of chiral building blocks and key intermediates to bioactive compounds And (S)-2-Amino-2-(4-fluorophenyl)ethanol (cas: 224434-01-9) was used in the research process.

(S) – 2-amino-2 – (4-fluorophenyl) ethanol (cas: 224434-01-9) has the characteristics of alcohol. In general, the hydroxyl group makes alcohols polar. Those groups can form hydrogen bonds to one another and to most other compounds. Related Products of 224434-01-9

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Yada, Shiho;Yoshioka, Yuiko;Ohno, Masashi;Koda, Toshinari;Yoshimura, Tomokazu published 《Adsorption and aggregation properties of homogeneous polyoxyethylene alkyl ether- and ester-type nonionic surfactants with multi-branched double chains》 in 2022. The article was appeared in 《Colloids and Surfaces, A: Physicochemical and Engineering Aspects》. They have made some progress in their research.Electric Literature of C16H34O The article mentions the following:

Homogeneous polyoxyethylene (EO) alkyl ether- and ester-type nonionic surfactants with multi-branched double chains were newly synthesized. Their adsorption and aggregation properties were investigated through cloud point, surface tension, and small-angle X-ray scattering measurements, and compared to those of homogeneous EO alkyl ether- and ester-type nonionic surfactants with sym. and asym. linear double chains as well as a conventional surfactant with a linear single chain. The surface tension at the critical micelle concentration for the multi-branched double-chain type decreased considerably to 27.9-28.8 mN m^-1 despite having a large hydrophilic group of EO12 when multi-branched Me groups with low surface energy were used as the hydrophobic groups of the surfactants. In the temperature vs. concentration phase diagrams, the regions of lamellar liquid crystals were more extensive for the linear double-chain surfactants because of the small interfacial curvature induced by the steric hindrance of the multi-branched chains. To complete the study, the researchers used 2-Hexyl-1-decanol (cas: 2425-77-6) .

2-Hexyl-1-decanol(cas: 2425-77-6) may be employed as an organic solvent to study the extraction of non-polar acidic drugs from human plasma by parallel artificial liquid membrane extraction (PALME). Electric Literature of C16H34O

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dos Santos Andrade, Moacir;do Prado Ribeiro, Leandro;Borgoni, Paulo Cesar;das Gracas Fernandes da Silva, Maria Fatima;Forim, Moacir Rossi;Fernandes, Joao Batista;Vieira, Paulo Cezar;Vendramin, Jose Djair;Machado, Marcos Antonio published 《Essential oil variation from twenty two genotypes of Citrus in Brazil-chemometric approach and repellency against Diaphorina citri Kuwayama》. The research results were published in《Molecules》 in 2016.COA of Formula: C10H22O The article conveys some information:

The chem. composition of volatile oils from 22 genotypes of Citrus and related genera was poorly differentiated, but chemometric techniques have clarified the relationships between the 22 genotypes, and allowed us to understand their resistance to D. citri. The most convincing similarities include the synthesis of (Z)-β-ocimene and (E)-caryophyllene for all 11 genotypes of group A. Genotypes of group B are not uniformly characterized by essential oil compounds When stimulated with odor sources of 22 genotypes in a Y-tube olfactometer D. citri preferentially entered the arm containing the volatile oils of Murraya paniculata, confirming orange jasmine as its best host. C. reticulata × C. sinensis was the least preferred genotype, and is characterized by the presence of phytol, (Z)-β-ocimene, and β-elemene, which were not found in the most preferred genotype. We speculate that these three compounds may act as a repellent, making these oils less attractive to D. citri. The experimental procedure involved many compounds, such as 3,7-Dimethyloctan-3-ol (cas: 78-69-3) .

3,7-Dimethyloctan-3-ol(cas:78-69-3) is a fatty alcohol that is 3-octanol substituted by methyl groups at positions 3 and 7.COA of Formula: C10H22O Metabolite observed in cancer metabolism. It has a role as a human metabolite.

Reference:
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