Month: September 2022

COA of Formula: C14H14O2《Amine Catalysis for the Organocatalytic Diboration of Challenging Alkenes》 was published in 2016. The authors were Farre, Albert;Soares, Kaline;Briggs, Rachel A.;Balanta, Angelica;Benoit, David M.;Bonet, Amadeu, and the article was included in《Chemistry – A European Journal》. The author mentioned the following in the article:

The generation of in situ sp²-sp³ diboron adducts has revolutionized the synthesis of organoboranes. Organocatalytic diboration reactions have represented a milestone in terms of unpredictable reactivity of these adducts. However, current methodologies have limitations in terms of substrate scope, selectivity and functional group tolerance. Here a new methodol. based on the use of simple amines as catalyst is reported. This methodol. provides a completely selective transformation overcoming current substrate scope and functional/protecting group limitations. Mechanistic studies have been included in this report. 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 COA of Formula: C14H14O2) has been used in the preparation of trans-methyl meso-hydrobenzoin phosphite.

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Minakawa, Maki;Sakurai, Yuya published 《Bismuth(III) Triflate-Catalyzed Intermolecular Cyclization of Phenols with Diols: Direct Access to O-Heterocycles》 in 2022. The article was appeared in 《Synlett》. They have made some progress in their research.SDS of cas: 599-64-4 The article mentions the following:

A direct access to O-heterocycles e.g., I by Bi(OTf)₃-catalyzed intermol. cyclization of phenols such as naphthalene-2,6-diol, 2-naphthol, 4-(2-phenylpropan-2-yl)phenol, etc. with diols such as, propane-1,3-diol, pentane-2,4-diol, 2,5-dimethylhexane-2,5-diol, etc.was described. Catalytic dehydrative tandem formation of C-O and C-C bonds was achieved by using a Bi(OTf)₃ catalyst without any additives. The catalytic intermol. cyclization of phenols with various diols proceeded to give the corresponding chromanes e.g., I in up to 91% yield and/or furan derivatives II [R = H, Me; R¹ = iso-Pr, ethyl; R² = H, Me; R³ = H, COOMe] up to 66% yield. The experimental procedure involved many compounds, such as 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.SDS of cas: 599-64-4 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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Li, Qi;Chai, Changsheng;Zhao, Linguo published 《Biodegradation of Endocrine Disrupting Chemicals with Laccase Isozymes from Recombinant Pichia pastori》. The research results were published in《Catalysis Letters》 in 2022.COA of Formula: C14H22O The article conveys some information:

In this paper, five recombinant strains: GS115-LacA, GS115-LacB, GS115-LacC, KM71H-Lcc1 and GS115-Lcc2 were selected to produce laccase isoenzymes with high activities, which reached 13,001 U/L, 10,254 U/L, 11,495 U/L, 9924 U/L and 10,031 U/L on 15th, resp. Then, we investigated the specificity of several recombinant laccase isoenzymes for the degradation of endocrine disrupting chems. (phenolic compounds). The results showed that LacB had the most efficient in degradation of bisphenol A and octyl phenol, while Lcc1 degraded 4-n-octylphenol, gossypol and hydroquinone better. Finally, the effects of degradation conditions were optimized, which shown that the degradation rates of phenolic compounds increased with the optimum temperature and pH by different laccases were different, which were closely related to their enzymic properties. Under the optimum reaction conditions, the degradation rate of bisphenol A, gossypol, 4-n-octylphenol, octyl phenol and hydroquinone were 95.4%, 93.2%, 89.6%, 71.0% and 91.9% at 8 h, 8 h, 12 h, 24 h and 1 h, resp. Furthermore, the recombinant laccases were used to degrade phenolic compounds in several laccase/mediator systems, which ABTS and vanillin showed most enhancement on degradation rates and reduction of degradation times. In LacB-ABTS and Lcc1-guaiacol/vanillin systems, the degradation rates of five phenolic compounds reached the maximum with totally 100% within 4 h. All of the results open up promising perspectives for the degradation and oxidative biotransformation of typical phenolic pollutants in the environment. Graphical Abstract: [graphic not available: see fulltext]. The experimental procedure involved many compounds, such as 4-tert-Octylphenol (cas: 140-66-9) .

4-tert-Octylphenol(cas: 140-66-9) is a common environmental pollutant showing weak estrogenic effects.COA of Formula: C14H22O It has been shown to cause harm to vertebrate male reproductive systems.

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Sotto, Nicolas;Billamboz, Muriel;Chevrin-Villette, Carole;Len, Christophe published 《Selective Pinacol Coupling on Regeneratable Supported Acids in Sole Water》. The research results were published in《Journal of Organic Chemistry》 in 2015.Synthetic Route of C14H14O2 The article conveys some information:

Efficient pinacol coupling was developed in water, using a reusable heterogeneous supported acid source and zinc as cheap available metal source. This medium can be easily regenerated up to 10-fold without loss of activity. Moreover, supported acids enhance the selectivity of the pinacol coupling reaction compared with homogeneous acids. Thus, e.g., pinacol coupling of 4-bromobenzaldehyde in water using Zn as electron donor and Amberlyst 15 as proton source afforded 1,2-bis(4-bromophenyl)-1,2-ethanediol (82%, DL/meso = 29/71) + 4-bromobenzyl alc. (11%). 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 Synthetic Route of C14H14O2) has been used in the preparation of trans-methyl meso-hydrobenzoin phosphite.

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Wang, Yali;Yang, Lu;Zhang, Ke;Chen, Xiaoxiang;Wang, Hangyu;Cheng, Ping;Wang, Jinhui published 《Untargeted metabolomics analysis of different grape varieties and different parts of wine grape using gas chromatography and mass spectrometry technique》. The research results were published in《Journal of Biobased Materials and Bioenergy》 in 2021.Name: 2,2-Methylenebis(6-tert-butyl-p-cresol) The article conveys some information:

Natural active compounds are an important key to the development and utilization of functional foods and medicine. In this study, the chem. diversity and varietal differences of wine grape were studied by using the untargeted metabolomics method based on gas chromatog.-mass spectrometry (GC-MS), and the secondary metabolites of different cultivars and different parts were analyzed. A GC-MS-based metabolomic approach and chemometrics tools was used to identify potential active compounds in Vitis vinifera. The results showed that the content of active compounds in red wine varieties was higher than that in white wine varieties, and the content of active ingredients in grape seeds was significantly higher than that in fruits. In conclusion, this study analyzed the metabolite composition and differentiation of different wine grape fruits in Turpan as a whole, and is expected to lay a foundation for the study of wine grape and to provide a theor. basis for development and utilization of the Dietary supplement and medicine on them. And 2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) was used in the research process.

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

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Name: 4-tert-Amylphenol《Risk-based high-throughput chemical screening and prioritization using exposure models and in vitro bioactivity assays》 was published in 2015. The authors were Shin, Hyeong-Moo;Ernstoff, Alexi;Arnot, Jon A.;Wetmore, Barbara A.;Csiszar, Susan A.;Fantke, Peter;Zhang, Xianming;McKone, Thomas E.;Jolliet, Olivier;Bennett, Deborah H., and the article was included in《Environmental Science & Technology》. The author mentioned the following in the article:

The authors present a risk-based high-throughput screening (HTS) method to identify chems. for potential health concerns or for which addnl. information is needed. The method is applied to 180 organic chems. as a case study. The authors first obtain information on how the chem. is used and identify relevant use scenarios (e.g., dermal application, indoor emissions). For each chem. and use scenario, exposure models are then used to calculate a chem. intake fraction, or a product intake fraction, accounting for chem. properties and the exposed population. The authors then combine these intake fractions with use scenario-specific estimates of chem. quantity to calculate daily intake rates (iR; mg/kg/day). These intake rates are compared to oral equivalent doses (OED; mg/kg/day), calculated from a suite of ToxCast in vitro bioactivity assays using in vitro-to-in vivo extrapolation and reverse dosimetry. Bioactivity quotients (BQs) are calculated as iR/OED to obtain estimates of potential impact associated with each relevant use scenario. Of the 180 chems. considered, 38 had maximum iRs exceeding min. OEDs (i.e., BQs >1). For most of these compounds, exposures are associated with direct intake, food/oral contact, or dermal exposure. The method provides high-throughput estimates of exposure and important input for decision makers to identify chems. of concern for further evaluation with addnl. information or more refined models. And 4-tert-Amylphenol (cas: 80-46-6) was used in the research process.

4-tert-acylphenol (cas:80-46-6) contains hydroxyl group. Owing to the presence of the polar OH alcohols are more water-soluble than simple hydrocarbons. Methanol, ethanol, and propanol are miscible in water. Butanol, with a four-carbon chain, is moderately soluble.Name: 4-tert-Amylphenol

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Product Details of 579-43-1《Microbial synthesis of (S)- and (R)-benzoin in enantioselective desymmetrization and deracemization catalyzed by Aureobasidium pullulans included in the blossom protect agent》 was published in 2021. The authors were Kolodziejska, Renata;Studzinska, Renata;Tafelska-Kaczmarek, Agnieszka;Pawluk, Hanna;Mlicka, Dominika;Wozniak, Alina, and the article was included in《Molecules》. The author mentioned the following in the article:

Aureobasidium pullulans strains DSM 14940 and DSM 14941 included in the Blossom Protect agent to be used in the bioreduction reaction of a sym. dicarbonyl compound Both chiral 2-hydroxy-1,2-diphenylethanone antipodes were obtained with a high enantiomeric purity. Mild conditions (phosphate buffer [pH 7.0, 7.2], 30°C) were successfully employed in the synthesis of (S)-benzoin using two different methodologies: benzyl desymmetrization and rac-benzoin deracemization. Bioreduction carried out with higher reagent concentrations, lower pH values and prolonged reaction time, and in the presence of additives, enabled enrichment of the reaction mixture with (R)-benzoin. The described procedure was a potentially useful tool in the synthesis of chiral building blocks with a defined configuration in a simple and economical process with a lower environmental impact, enabling one-pot biotransformation. 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 Product Details of 579-43-1) 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.

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Pojmanova, Petra;Ladislavova, Nikola;Skerikova, Veronika;Kania, Patrik;Urban, Stepan published 《Human scent samples for chemical analysis》 in 2020. The article was appeared in 《Chemical Papers》. They have made some progress in their research.SDS of cas: 2425-77-6 The article mentions the following:

This study is focused on finding an optimal preparation of the human scent samples for their detailed chem. anal. in connection with the possible forensic identifications of human individuals in the future. At the present time, the scent identification of people is carried out nearly exclusively using specially trained dogs. It is assumed that the human scent contains a certain group of compounds which allows the identification of people, the so-called human scent signature; however, its chem. composition is completely unknown, as of now. The principal problem of human scent studies consists in the very low concentrations of thousands of the scent compounds, whereas their relative concentrations are usually dramatically different. It seems to be obvious that the most appropriate anal. technique for these thousands of different chem. compounds is GC/MS. However, it is also necessary to find the most suitable sorbent material for human scent collection, an extraction solvent, and a pre-concentration technique. The selection of the appropriate gas chromatog. method is also important to achieve the optimal resolution of the targeted compounds Of course, in the first instance, it is necessary to decide what it means “the most suitable” for human scent chem. anal.2-Hexyl-1-decanol (cas: 2425-77-6) were involved in the experimental procedure.

2-Hexyl-1-decanol(cas: 2425-77-6) is a branched alcohol. It is one of the constituent of the essential oil, extracted from the roots of Adiantum flabellulatum. SDS of cas: 2425-77-6

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Gray, Leon E. Jr.;Furr, Johnathan R.;Lambright, Christy S.;Evans, Nicola;Hartig, Phillip C.;Cardon, Mary C.;Wilson, Vickie S.;Hotchkiss, Andrew K.;Conley, Justin M. published 《Quantification of the uncertainties in extrapolating from in vitro androgen receptor antagonism to in vivo hershberger assay endpoints and adverse reproductive development in male rats》 in 2020. The article was appeared in 《Toxicological Sciences》. They have made some progress in their research.Synthetic Route of C15H16O The article mentions the following:

Multiple mol. initiating events exist that disrupt male sexual differentiation in utero including androgen receptor (AR) antagonism and inhibition of synthesis, and metabolism of fetal testosterone. Disruption of androgen signaling by AR antagonists in utero reduces anogenital distance (AGD) and induces malformations in F1 male rat offspring. We are developing a quant. network of adverse outcome pathways that includes multiple mol. initiating events and key events linking anti-AR activities to permanent reproductive abnormalities. Here, our objective was to determine how accurately the EC50s for AR antagonism in vitro or ED50s for reduced tissue growth in the Hershberger assay (HA) (key events in the adverse outcome pathway) predict the ED50s for reduced AGD in male rats exposed in utero to AR antagonists. This effort included inhouse data and published studies from the last 60 years on AR antagonism in vitro and in vivo effects in the HA and on AGD after in utero exposure. In total, more than 250 studies were selected and included in the anal. with data from about 60 potentially antiandrogenic chems. The ability to predict ED50s for key events and adverse developmental effects from the in vitro EC50s displays considerable uncertainty with R2 values for HA and AGD of < 6%. In contrast, there is considerably less uncertainty in extrapolating from the ED50s in the HA to the ED50s for AGD (R2 value of about 85%). In summary, the current results suggest that the key events measured in the HA can be extrapolated with reasonable certainty to predict the ED50s for the adverse in utero effects of antiandrogenic chems. on male rat offspring. The experimental procedure involved many compounds, such as 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.Synthetic Route of C15H16O 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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Yuan, Shiyu;Li, Haijing;Liu, Zhiqiang;Wang, Yutong;Wang, Li;Zhang, Xiangwen;Liu, Guozhu published 《Measurement of non-hindered and hindered phenolic species in aviation fuels via tandem-SPE with comprehensive GC x GC-MS/FID》 in 2021. The article was appeared in 《Fuel》. They have made some progress in their research.SDS of cas: 80-46-6 The article mentions the following:

Phenolic species have a great impact on the thermal oxidation stability of aviation fuels. However, it is difficult to measure phenolic complex composition and trace content. In this paper, a novel method based on tandem-solid phase extraction (SPE) with comprehensive two-dimensional gas chromatog. (GC x GC)-mass spectrometry (MS) and flame ionization detector (FID) was proposed for measurement of phenolic species in aviation fuels. The tandem of normal phase SPE and anion exchange SPE was employed to extract non-hindered and hindered phenolic species resp. from aviation fuels, and comprehensive GC x GC-MS/FID was used to identify and quantify individual phenolic species with few co-elution. Ninety-eight kinds of phenolic species were identified manually in aviation fuels according to the characteristic m/z and phenolic distribution regular in the 2D chromatogram. Quant. accuracy for phenolic species was verified as their recoveries were satisfactory, especially hindered phenols (BHT), which were totally deprotonated by 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD). Each phenolic species was individually quantified using calibration curve library. Moreover, this work analyzed the adsorption characteristics of phenolic isomers in tandem-SPE procedure and the variation of the contents of phenolic and other oxygenated species after thermal stress. This is an accurate and complete method for measurement of non-hindered and hindered phenolic species in aviation fuels, which is of great significance to establish and improve the kinetic model of thermal oxidation deposition. And 4-tert-Amylphenol (cas: 80-46-6) was used in the research process.

4-tert-acylphenol (cas:80-46-6) contains hydroxyl group. Owing to the presence of the polar OH alcohols are more water-soluble than simple hydrocarbons. Methanol, ethanol, and propanol are miscible in water. Butanol, with a four-carbon chain, is moderately soluble.SDS of cas: 80-46-6

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