Tag: 200-300

Safety of rel-(1R,2S)-1,2-Diphenylethane-1,2-diol《Aerobic oxidation of alcohols with air catalyzed by decacarbonyldimanganese》 was published in 2019. The authors were Meng, Shan-Shui;Lin, Li-Rong;Luo, Xiang;Lv, Hao-Jun;Zhao, Jun-Ling;Chan, Albert S. C., and the article was included in《Green Chemistry》. The author mentioned the following in the article:

The oxidation of alcs. to carbonyl compounds using air as the terminal oxidant is highly desirable. As described in previous reports, the abstraction of α-H of the alc. is the most important step, and it typically requires not only a metal catalyst but also complex ligands, co-catalysts and bases. Herein, we report a practical and efficient method for the oxidation of primary alcs., secondary alcs., 1,2-diols, 1,2-amino alcs., and other α-functionalized alcs. using a com. available catalyst, Mn₂(CO)₁₀, and no additives. Preliminary mechanistic studies indicated that an alkoxyl radical intermediate existed in our system, and a plausible mechanism consistent with the exptl. results and literature was proposed.rel-(1R,2S)-1,2-Diphenylethane-1,2-diol (cas: 579-43-1) were involved in the experimental procedure.

Desymmetrization of rel-(1R,2S)-1,2-Diphenylethane-1,2-diol(cas:579-43-1 Safety of rel-(1R,2S)-1,2-Diphenylethane-1,2-diol) using chiral phosphine catalyst has been reported. Conversion of meso-hydrobenzoin to trans-stillbene oxide by treatment with an aryl sulfonyl chloride and aqueous sodium hydroxide has been reported.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

SDS of cas: 140-66-9《Chemical Characterization of Recycled Consumer Products Using Suspect Screening Analysis》 was published in 2021. The authors were Lowe, Charles N.;Phillips, Katherine A.;Favela, Kristin A.;Yau, Alice Y.;Wambaugh, John F.;Sobus, Jon R.;Williams, Antony J.;Pfirrman, Ashley J.;Isaacs, Kristin K., and the article was included in《Environmental Science & Technology》. The author mentioned the following in the article:

Recycled materials are found in many consumer products as part of a circular economy; however, the chem. content of recycled products is generally uncharacterized. A suspect screening anal. using two-dimensional gas chromatog. time-of-flight mass spectrometry (GC x GC-TOFMS) was applied to 210 products (154 recycled, 56 virgin) across seven categories. Chems. in products were tentatively identified using a standard spectral library or confirmed using chem. standards A total of 918 probable chem. structures identified (112 of which were confirmed) in recycled materials vs. 587 (110 confirmed) in virgin materials. Identified chems. were characterized in terms of their functional use and structural class. Recycled paper products and construction materials contained greater numbers of chems. than virgin products; 733 identified chems. had greater occurrence in recycled compared to virgin materials. Products made from recycled materials contained greater numbers of fragrances, flame retardants, solvents, biocides, and dyes. The results were clustered to identify groups of chems. potentially associated with unique chem. sources, and identified chems. were prioritized for further study using high-throughput hazard and exposure information. While occurrence is not necessarily indicative of risk, these results can be used to inform the expansion of existing models or identify exposure pathways currently neglected in exposure assessments. And 4-tert-Octylphenol (cas: 140-66-9) was used in the research process.

4-tert-Octylphenol(cas: 140-66-9) has been used as a reference standard for the determination of the analyte in water samples using ultra-high-performance liquid chromatography/tandem mass spectrometry (UHPLC/MS/MS).SDS of cas: 140-66-9

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Geng, Hui-Qing;Wu, Xiao-Feng published 《Copper-Catalyzed Alkoxycarbonylation of Alkyl Iodides for the Synthesis of Aliphatic Esters: Hydrogen Makes the Difference》 in 2021. The article was appeared in 《Organic Letters》. They have made some progress in their research.Formula: C15H16O The article mentions the following:

A copper-catalyzed alkoxycarbonylation transformation of unactivated alkyl iodides was developed. Various alkyl iodides were converted into the corresponding tert-Bu esters in good yields. NaOt-Bu acts as both a nucleophile and a base. Moreover, other types of aliphatic esters was also be obtained in moderated yields if extra alcs. are added. Both primary and secondary alkyl alcs. can react successfully.4-(2-Phenylpropan-2-yl)phenol (cas: 599-64-4) were involved in the experimental procedure.

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

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhou, Feng;Hu, Xiaoying;Gao, Ming;Cheng, Tanyu;Liu, Guohua published 《An imidazolium-modified chiral rhodium/diamine-functionalized periodic mesoporous organosilica for asymmetric transfer hydrogenation of α-haloketones and benzils in aqueous medium》. The research results were published in《Green Chemistry》 in 2016.Application In Synthesis of rel-(1R,2S)-1,2-Diphenylethane-1,2-diol The article conveys some information:

The use of a hydrophobic, imidazolium-functionalized periodic mesoporous organosilica for immobilization of chiral organometallic complexes as a heterogeneous catalyst is highly desirable as this catalyst can greatly promote an aqueous organic transformation due to its hydrophobic function and phase-transfer feature in an aqueous medium. Herein, by utilizing a three-component co-condensation strategy, we conveniently incorporate 1,2-bis(triethoxysilyl)ethane, (R,R)-4-((trimethoxysilyl)ethyl)phenylsulfonyl-1,2-diphenylethylene-diamine and 1,3-bis(3-(triethoxysilyl)propyl)-1H-imidazol-3-ium iodide within its silicate network, which is coordinated with (Cp*RhCl₂)₂, leading to an imidazolium-modified chiral rhodium/diamine-functionalized periodic mesoporous organosilica. A solid-state carbon spectrum discloses its well-defined chiral rhodium/diamine active species, and its X-ray diffraction; nitrogen adsorption-desorption measurement and transmission electron microscopy images reveal its ordered dimensional-hexagonal mesostructure. As a bifunctional heterogeneous catalyst, this periodic mesoporous organosilica significantly boosts asym. transfer hydrogenation of α-haloketones and benzils in water, where the hydrophobic periodic mesoporous organosilica, phase-transfer-featured imidazolium-functionality, and the confined chiral organorhodium catalytic nature are responsible for its catalytic performance. Furthermore, the catalyst can be recovered and recycled seven times without the loss of its catalytic activity, making it an attractive heterogeneous catalyst for asym. transfer hydrogenation in an environmentally friendly manner. To complete the study, the researchers used rel-(1R,2S)-1,2-Diphenylethane-1,2-diol (cas: 579-43-1) .

Desymmetrization of rel-(1R,2S)-1,2-Diphenylethane-1,2-diol(cas:579-43-1 Application In Synthesis of rel-(1R,2S)-1,2-Diphenylethane-1,2-diol) using chiral phosphine catalyst has been reported. Conversion of meso-hydrobenzoin to trans-stillbene oxide by treatment with an aryl sulfonyl chloride and aqueous sodium hydroxide has been reported.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Amsallem, Dana;Bedi, Anjan;Tassinari, Francesco;Gidron, Ori published 《Relation between Morphology and Chiroptical Properties in Chiral Conducting Polymer Films: A Case Study in Chiral PEDOT》 in 2020. The article was appeared in 《Macromolecules (Washington, DC, United States)》. They have made some progress in their research.Category: alcohols-buliding-blocks The article mentions the following:

The electronic properties of conducting polymers are influenced by their micro- and macrostructural orders, which can be tailored by substituent modification. However, while the effect of substituents on conducting polymers is extensively investigated, chiral substituents are far less studied. Furthermore, many chiral conducting polymers have regioirregular structures, which result in polymer films with inferior properties. In this work, we apply electronic CD (ECD) spectroscopy to study the morphol. changes to the chiral polymers under different polymerization conditions. For this purpose, we investigated 3,4-ethylenedioxythiophene (EDOT) derivatives having two stereogenic centers on each monomer and bearing Me or Ph side groups (dimethyl-EDOT and diphenyl-EDOT, resp.). Polymerizing the enantiomerically pure monomers produces regioregular and stereoregular dimethyl-PEDOT and diphenyl-PEDOT, resp. The effect of the electrolyte and solvent on polymer film morphol. was studied using SEM and ECD, showing a correlation between the polymer’s morphol. and the chiroptical properties of its films. We found that, for diphenyl-PEDOT, the combination of perchlorate anion electrolyte and acetonitrile solvent resulted in a unique morphol. characterized by significant intermol. interactions. These interactions were clearly observable in the ECD spectra in the form of exciton couplings, whose presence was supported by TD-DFT calculations A small enantiomeric excess was sufficient to induce very intense ECD signals, demonstrating chiral amplification in electropolymerized films. To complete the study, the researchers used rel-(1R,2S)-1,2-Diphenylethane-1,2-diol (cas: 579-43-1) .

rel-(1R,2S)-1,2-Diphenylethane-1,2-diol(cas: 579-43-1 Category: alcohols-buliding-blocks) has been used in the preparation of trans-methyl meso-hydrobenzoin phosphite.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Safety of 4-tert-Octylphenol《Electrospun alginate mats embedding silver nanoparticles with bioactive properties》 was published in 2022. The authors were Alloisio, Marina;Dodero, Andrea;Alberti, Stefano;Vicini, Silvia;Castellano, Maila, and the article was included in《International Journal of Biological Macromolecules》. The author mentioned the following in the article:

Polysaccharide-based composites embedding silver nanoparticles (AgNPs) represent a promising alternative to common antimicrobial materials because of the effective, broad-spectrum biocidal properties of AgNPs combined with the biocompatibility and environmental safety of the naturally occurring polymeric component. In this work, AgNPs stabilized with alginate chains (Alg@AgNPs) were successfully synthesized in situ within the polysaccharide solution through a wet chem. approach carried out at different concentrations of the silver salt precursor. Once obtained, the aqueous suspensions were electrospun to prepare non-woven membranes, showing a homogeneous nanostructured texture (with fiber diameter between 100 and 150 nm), which was found to be influenced by the size (between 20 and 35 nm) of the embedded metal nanoparticles. The biocidal potential of the nanocomposite mats was preliminarily tested against Gram-neg. E. coli. The results showed that the antimicrobial response of the investigated samples occurred within a day of incubation and can be observed for AgNPs content in the polysaccharide fibers far below the nanomolar regime. The experimental procedure involved many compounds, such as 4-tert-Octylphenol (cas: 140-66-9) .

4-tert-Octylphenol(cas: 140-66-9) has been used as a reference standard for the determination of the analyte in water samples using ultra-high-performance liquid chromatography/tandem mass spectrometry (UHPLC/MS/MS).Safety of 4-tert-Octylphenol

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Safety of rel-(1R,2S)-1,2-Diphenylethane-1,2-diolIn 2020, Chatterjee, Gourav;Shadangi, Krushna Prasad;Mohanty, Kaustubha published 《Effect of Catalyst Bed Height on the Yield and Composition of Non-edible Seed Pyrolytic Oil》. 《Waste and Biomass Valorization》published the findings. The article contains the following contents:

The thermal and catalytic vapor cracking of non-edible seed such as Kassod seed was studied in a fixed bed reactor. The effect of temperature on the yield of pyrolytic liquid was observed from thermal pyrolysis and the optimum temperature was determined At the optimum temperature catalytic vapor cracking using CaO was studied by varying the catalyst loading as well as the bed height. The effect of catalyst loading and bed height on the yield, fuel properties, distillation temperature and composition of pyrolytic oil were determined The results confirmed that thermal pyrolysis of Kassod seed at 550°C yielded 50.21 wt% of pyrolytic liquid containing 39.86 wt% and 10.35 wt% organic and aqueous phase resp. The highest yield of pyrolytic oil (organic liquid) was 31.2 wt% and 22.95 wt% obtained at 2 wt% loading of catalyst at a bed height of 8.5 cm and 11.1 cm resp. The effect of catalytic vapor cracking with the variation in the bed height on the fuel properties confirmed that increasing the catalyst bed height raised the basicity of the pyrolytic oil. The gross calorific value of the oil increased at higher wt% of catalyst loading and were better at the catalyst bed height of 11.1 cm. The catalytic vapor cracking enhanced the fuel properties of the pyrolytic oil by the formation of more volatile components in the pyrolytic oil. The variation in the composition of the pyrolytic oil with and without catalyst was confirmed from the GC-MS anal.rel-(1R,2S)-1,2-Diphenylethane-1,2-diol (cas: 579-43-1) were involved in the experimental procedure.

Desymmetrization of rel-(1R,2S)-1,2-Diphenylethane-1,2-diol(cas:579-43-1 Safety of rel-(1R,2S)-1,2-Diphenylethane-1,2-diol) using chiral phosphine catalyst has been reported. Conversion of meso-hydrobenzoin to trans-stillbene oxide by treatment with an aryl sulfonyl chloride and aqueous sodium hydroxide has been reported.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hu, Junjie;Liu, Jinhuan;Lv, Xiaomei;Yu, Lili;Lan, Shanhong;Li, Yanliang;Yang, Yan published 《Assessment of epigenotoxic profiles of Dongjiang River: A comprehensive of chemical analysis, in vitro bioassay and in silico approach》 in 2021. The article was appeared in 《Environmental Pollution (Oxford, United Kingdom)》. They have made some progress in their research.Product Details of 140-66-9 The article mentions the following:

This research explored the occurrence, epigenetic toxic profiling and main toxic pollutants of POPs in surface water of Dongjiang River, southern China. The concentrations of selected POPs including polycyclic aromatic hydrocarbons (PAHs), endocrine disrupting chems. (EDCs), phthalate esters (PAEs) and polybrominated di-Ph ethers (PBDEs) of surface water from 18 sites were investigated. ∑16PAHs and ∑4EDCs were at a moderate level, while ∑6PAEs and ∑6PBDEs had low pollution levels. PAHs, EDCs and PAEs showed higher concentrations in dry season than those in wet season, and the loading of selected POPs in tributaries was higher than those in mainstream due to intensive manufactures and lower runoff volume Moreover, activities of DNA methyltransferase (DNMT)1, histone deacetylase (HDAC2, HDAC8) were confirmed to be sensitive indicators for epigenetic toxicity. The DNMT1-mediated epigenetic equivalency toxicity of organic extracts in Dongjiang River were more serious than those of HDAC2 and HDAC8. Correlation anal. shown binding affinity between POPs and DNMT1, HDAC2 and HDAC8 could be regarded as toxic equivalency factors. Risk assessment suggested that 4-nonylphenol and bisphenol A were the largest contributors to epigenetic risk. This study is the first attempt to quantify epigenetic toxicity and epigenetic risk evaluation of river water.4-tert-Octylphenol (cas: 140-66-9) were involved in the experimental procedure.

4-tert-Octylphenol(cas: 140-66-9) has been used as a reference standard for the determination of the analyte in water samples using ultra-high-performance liquid chromatography/tandem mass spectrometry (UHPLC/MS/MS).Product Details of 140-66-9

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Pan, Liangkun;Ke, Zhihai;Yeung, Ying-Yeung published 《Lewis Base Catalyzed Dioxygenation of Olefins with Hypervalent Iodine Reagents》. The research results were published in《Organic Letters》 in 2021.Category: alcohols-buliding-blocks The article conveys some information:

1,2-Diols were extremely useful building blocks in organic synthesis. Hypervalent iodine reagents were useful for the vicinal dihydroxylation of olefins to gave 1,2-diols under metal-free conditions, but strongly acidic promoters were often required. Herein, synthesis of 1,2-diols R¹CHOHCHOHR² [R¹ = n-hexyl, Ph, Bn, etc.; R² = H, Ph] and acetals R³CH₂CH(OMe)₂ [R³ = Ph, 4-MeOC₆H₄, (4-acetoxyphenyl), etc.] via catalytic vicinal dioxygenation of olefins with hypervalent iodine reagents using Lewis bases as catalysts was reported. The conditions were mild and compatible with various functional groups. To complete the study, the researchers used rel-(1R,2S)-1,2-Diphenylethane-1,2-diol (cas: 579-43-1) .

Desymmetrization of rel-(1R,2S)-1,2-Diphenylethane-1,2-diol(cas:579-43-1 Category: alcohols-buliding-blocks) using chiral phosphine catalyst has been reported. Conversion of meso-hydrobenzoin to trans-stillbene oxide by treatment with an aryl sulfonyl chloride and aqueous sodium hydroxide has been reported.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Formula: C15H16O《Accelerated SuFEx Click Chemistry For Modular Synthesis》 was published in 2022. The authors were Smedley, Christopher J.;Homer, Joshua A.;Gialelis, Timothy L.;Barrow, Andrew S.;Koelln, Rebecca A.;Moses, John E., and the article was included in《Angewandte Chemie, International Edition》. The author mentioned the following in the article:

The development of accelerated SuFEx click chem. (ASCC), an improved SuFEx method for the efficient and catalytic coupling of aryl and alkyl alcs. with a range of SuFExable hubs was reported. Barton’s hindered guanidine base (2-tert-butyl-1,1,3,3-tetramethylguanidine; BTMG) was demonstrated as a superb SuFEx catalyst, when used in synergy with silicon additive hexamethyldisilazane (HMDS), yielded stable S-O bond linkages in a single step; often within minutes. The powerful combination of BTMG and HMDS reagents allowed for catalyst loadings as low as 1.0 mol % and in congruence with click-principles, provided a scalable method that is safe, efficient and practical for modular synthesis. ASSC expands the number of accessible SuFEx products and will find significant application in organic synthesis, medicinal chem., chem. biol., and materials science. 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.Formula: C15H16O 4-(2-Phenylpropan-2-yl)phenol is a useful reagent for preparing and characterizing aromatic polyphosphonates as high refractive index polymers.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts