Month: September 2022

Safety of rel-(1R,2S)-1,2-Diphenylethane-1,2-diol《Enantioselective acyl transfer catalysis by a combination of common catalytic motifs and electrostatic interactions》 was published in 2016. The authors were Mandai, Hiroki;Fujii, Kazuki;Yasuhara, Hiroshi;Abe, Kenko;Mitsudo, Koichi;Korenaga, Toshinobu;Suga, Seiji, and the article was included in《Nature Communications》. The author mentioned the following in the article:

It was demonstrated that by attaching a binaphthyl moiety, appropriately modified to establish H-bonding interactions within the key intermediates in the catalytic cycle and a 4-aminopyridyl unit, exceptionally efficient organic mols. could be prepared that facilitated enantioselective acyl transfer reactions. As little as 0.5 mol% of a member of the new catalyst class was sufficient to generate acyl-substituted all-carbon quaternary stereogenic centers in quant. yield and in up to 98:2 enantiomeric ratio (er) in 5 h. Kinetic resolution or desymmetrization of 1,2-diol could be performed with high efficiency and enantioselectivity as well.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.

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Li, Wengkun;Li, Jia;Wu, Bingmin;Lin, Ying;Kang, Huasheng;Liu, Li;Zhang, Guifang published 《Analysis of liposoluble components of cultivated and wild Lignosus rhinocerus》 in 2021. The article was appeared in 《Zhongyao Xinyao Yu Linchuang Yaoli》. They have made some progress in their research.HPLC of Formula: 119-47-1 The article mentions the following:

Objective Analyzing the differences in fat-soluble chem. composition between cultivated and wild Lignosus rhinocerus. Methods The sclerotium of Lignosus rhinocerus was artificially cultivated, and then, the liposol. components were extracted from sclerotium by refluxing extraction with petroleum ether, and the difference in chem. compositions between cultivated (in rice and in sawdust, resp.) and wild Lignosus rhinocerus were analyzed by gas chromatog.-mass spectrometry (GC-MS). The relative percentages of components were also calculated Results Eleven, 10 and 14 compounds were identified from the ingredients in petroleum ether extracts of the rice group (RP), sawdust group (SP), and wild group (WP) resp. The majority of them are hydrocarbon compounds The common components are 2, 4-Di-tert-butylphenol, pentacosane and hentriacontane. The relative percentage contents of pentacosane and hentriacontane were 15.85%, 17.36%, 16.43% and 12.01%, 11.58%, 19.29% for RP, SP and WP, resp. The difference of these three are:the ingredients of the rice group mainly contain Ergosterol and Nonacosane; those of the sawdust group mainly contain Docosane, Tricosane, Tetracosane; those of wild group varieties mainly contain Tetracosane, Erucylamide, Di-Bu phthalate, and 9, 12-Octadecadienoic acid (Z, Z) -, Et ester. Conclusion The lipophilic composition in petroleum ether extracts of cultivated and wild Lignosus rhinocerus are identical, which included 2, 4-Di-tertbutylphenol, pentacosane and hentriacontane; but there are clear differences. These findings provide reference for the quality evaluation and utilization of cultivated products of Lignosus rhinocerus.2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) were involved in the experimental procedure.

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

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Recommanded Product: 4-tert-OctylphenolIn 2022, Jiang, Qunjiao;Liu, Runfeng;Liu, Tao;Liang, Jun;Wu, Yanan;Feng, Baoying;Liu, Shun;Li, Han;Pan, Dongxiang;Qiu, Xiaoqiang;Huang, Dongping published 《Relationship between exposure of alkylphenols in serum of pregnant women during early pregnancy and adverse birth outcomes》. 《Environmental Science and Pollution Research》published the findings. The article contains the following contents:

Alkylphenols are a type of endocrine disruptors, which are commonly found in personal care products, food, and water and are more harmful to the human body. To investigate the relationship between exposure of alkylphenols in serum of pregnant women during early pregnancy and adverse birth outcomes, a total of 2035 healthy pregnant women and their neonates were recruited in the birth cohort of Zhuang nationality in Guangxi from 2015 to 2018. The peripheral venous blood samples were collected from pregnant women in early pregnancy; the concentrations of nonylphenol (NP), 4-nonylphenol (4-N-NP), 4-tert-octylphenol (4-T-OP), and 4-n-octylphenol (4-N-OP) in serum were detected by ultra-performance liquid performance chromatog.-tandem mass spectrometry (UPLC-MS). Binary logistic regression showed that NP [OR = 1.40 (95% CI: 1.00, 1.94)] was pos. associated with preterm birth. Restricted cubic spline analyses showed that logNP and log4-T-OP had non-linearity associations with preterm birth (logNP: P_overall = 0.006, P_non-linear = 0.003; log4-T-OP: P_overall = 0.004, P_non-linear = 0.002). Multiple linear regression anal. showed that maternal serum concentration of NP was neg. associated with birth weight of perinatal infants (β = -14.68, 95% CI: -29.18, -0.19), which may be sensitive in male neonates (β = -26.18, 95% CI: -47.33, -5.02). The findings demonstrate that nonylphenol is a risk factor of preterm birth, and nonylphenol is neg. associated with the birth weight in male infants. 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).Recommanded Product: 4-tert-Octylphenol

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Tan, Haoyue;Chen, Qinchang;Hong, Huixiao;Benfenati, Emilio;Gini, Giuseppina C.;Zhang, Xiaowei;Yu, Hongxia;Shi, Wei published 《Structures of Endocrine-Disrupting Chemicals Correlate with the Activation of 12 Classic Nuclear Receptors》. The research results were published in《Environmental Science & Technology》 in 2021.Quality Control of 4-(2-Phenylpropan-2-yl)phenol The article conveys some information:

Endocrine-disrupting chems. (EDCs) can inadvertently interact with 12 classic nuclear receptors (NRs) that disrupt the endocrine system and cause adverse effects. There is no widely accepted understanding about what structural features make thousands of EDCs able to activate different NRs as well as how these structural features exert their functions and induce different outcomes at the cellular level. This paper applies the hierarchical characteristic fragment methodol. and high-throughput screening mol. docking to comprehensively explore the structural and functional features of EDCs for the 12 NRs based on more than 7000 chems. from curated datasets. EDCs share three levels of key fragments. The primary and secondary fragments are associated with the binding of EDCs to four groups of receptors: steroidal nuclear receptors (SNRs, including androgen, estrogen, glucocorticoid, mineralocorticoid, and progesterone), retinoic acid receptors, thyroid hormone receptors, and vitamin D receptors. The tertiary fragments determine the activity type by interacting with two key locations in the ligand-binding domains of NRs (N-H5-H3-C and N-H7-H11-C for SNRs and N-H5-H5′-H2′-H3-C and N-H6′-H11-C for non-SNRs). The resulting compiled structural fragments of EDCs together with elucidated compound NR binding modes provide a framework for understanding the interactions between EDCs and NRs, facilitating faster and more accurate screening of EDCs for multiple NRs in the future. 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.Quality Control 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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Guardian, Mary Grace E.;He, Ping;Bermudez, Alysson;Duan, Shuiwang;Kaushal, Sujay S.;Rosenfeldt, Erik;Aga, Diana S. published 《Optimized suspect screening approach for a comprehensive assessment of the impact of best management practices in reducing micropollutants transport in the Potomac River watershed》. The research results were published in《Water Research: X》 in 2021.Recommanded Product: 140-66-9 The article conveys some information:

The vast number of chems. potentially reaching aquatic environment pose a challenge in maintaining the quality of water resources. However, best management practices to improve water quality are typically focused on reducing nutrient transport without assessing how these practices may impact the occurrence of micropollutants. The potential for co-management of nutrients and organic micropollutants exists, but few studies have comprehensively evaluated the suite of contaminants associated with different water quality management practices (riparian zone restoration, stormwater management, etc.). Furthermore, most studies dealing with the determination of micropollutants in environmental samples include only a limited number of target analytes, leaving many contaminants undetected. To address this limitation, there has been a gradual shift in environmental monitoring from using target anal. to either suspect screening anal. (SSA) or non-targeted anal. (NTA), which relies on accurate mass measurements, mass spectral fragmentation patterns, and retention time information obtained using liquid chromatog. coupled to high-resolution mass spectrometry. The work presented in this paper focuses on a wide-scope detection of micropollutants in surface water samples from the Potomac River watershed (United States). An inhouse database composed of 1039 compounds based on exptl. anal. of primary standards was established, and SSA workflow was optimized and applied to determine the presence of micropollutants in surface water. A total of 103 micropollutants were detected in the samples, some of which are contaminants that were not previously monitored and belong to various classes such as pharmaceuticals, personal care products, per-and polyfluoroalkyl substances and other persistent industrial chems. The impact of best management practices being implemented for nitrogen and phosphorus reductions were also assessed for their potential to reduce micropollutant transport. This work illustrates the advantages of suspect screening methods to determine a large number of micropollutants in environmental samples and reveals the potential to co-manage a diverse array of micropollutants based on shared transport and transformation mechanisms in watersheds. 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.Recommanded Product: 140-66-9 It has been shown to cause harm to vertebrate male reproductive systems.

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Baldwin, Austin K.;Corsi, Steven R.;Stefaniak, Owen M.;Loken, Luke C.;Villeneuve, Daniel L.;Ankley, Gerald T.;Blackwell, Brett R.;Lenaker, Peter L.;Nott, Michelle A.;Mills, Marc A. published 《Risk-Based Prioritization of Organic Chemicals and Locations of Ecological Concern in Sediment From Great Lakes Tributaries》. The research results were published in《Environmental Toxicology and Chemistry》 in 2022.COA of Formula: C14H22O The article conveys some information:

With improved anal. techniques, environmental monitoring studies are increasingly able to report the occurrence of tens or hundreds of chems. per site, making it difficult to identify the most relevant chems. from a biol. standpoint. For the present study, organic chem. occurrence was examined, individually and as mixtures, in the context of potential biol. effects. Sediment was collected at 71 Great Lakes (USA/Canada) tributary sites and analyzed for 87 chems. Multiple risk-based lines of evidence were used to prioritize chems. and locations, including comparing sediment concentrations and estimated porewater concentrations with established whole-organism benchmarks (i.e., sediment and water quality criteria and screening values) and with high-throughput toxicity screening data from the US Environmental Protection Agency′s ToxCast database, estimating additive effects of chem. mixtures on common ToxCast endpoints, and estimating toxic equivalencies for mixtures of alkylphenols and polycyclic aromatic hydrocarbons (PAHs). This multiple-lines-of-evidence approach enabled the screening of more chems., mitigated the uncertainties of individual approaches, and strengthened common conclusions. Collectively, at least one benchmark/screening value was exceeded for 54 of the 87 chems., with exceedances observed at all 71 of the monitoring sites. Chems. with the greatest potential for biol. effects, both individually and as mixture components, were bisphenol A, 4-nonylphenol, indole, carbazole, and several PAHs. Potential adverse outcomes based on ToxCast gene targets and putative adverse outcome pathways relevant to individual chems. and chem. mixtures included tumors, skewed sex ratios, reproductive dysfunction, hepatic steatosis, and early mortality, among others. The results provide a screening-level prioritization of chems. with the greatest potential for adverse biol. effects and an indication of sites where they are most likely to occur. To complete the study, the researchers used 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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Jiang, Qian;Liu, He;Zhang, Yan;Cui, Min-hua;Fu, Bo;Liu, Hong-bo published 《Insight into sludge anaerobic digestion with granular activated carbon addition: Methanogenic acceleration and methane reduction relief》. The research results were published in《Bioresource Technology》 in 2021.Product Details of 119-47-1 The article conveys some information:

In this study, the multiple effects of granular activated carbon (GAC) on sludge anaerobic digestion at ambient (16-24°C), mesophilic (35°C) and thermophilic (55°C) temperature were investigated. After GAC addition, although the methane yields of raw sludge were reduced by 6.5%-36.9%, the lag phases of methanogenesis were shortened by 19.3%-30.6% and the reductions of methane yields were declined to only 5.9%-8.1% simultaneously for pretreated sludge. The inhibitory substances like phenols that generated by thermal pretreatment were reduced after GAC addition, which were demonstrated to be responsible for the methanogenic acceleration. Meanwhile, the methane reduction due to the non-selective adsorption by GAC could be mitigated by pretreatment and elevated temperature Thus, a strategy coupling thermal pretreatment with detoxification by GAC was proposed to improve the methane production rate and avoid the neg. effects during sludge anaerobic digestion with GAC addition2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) were involved in the experimental procedure.

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

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Cain, Caitlin N.;Trinklein, Timothy J.;Ochoa, Grant S.;Synovec, Robert E. published 《Tile-Based Pairwise Analysis of GC x GC-TOFMS Data to Facilitate Analyte Discovery and Mass Spectrum Purification》. The research results were published in《Analytical Chemistry (Washington, DC, United States)》 in 2022.Computed Properties of C16H34O The article conveys some information:

A new tile-based pairwise anal. workflow, termed 1v1 anal., is presented to discover and identify analytes that differentiate two chromatograms collected using comprehensive two-dimensional (2D) gas chromatog. coupled with time-of-flight mass spectrometry (GC x GC-TOFMS). Tile-based 1v1 anal. easily discovered all 18 non-native analytes spiked in diesel fuel within the top 30 hits, outperforming standard pairwise chromatog. analyses. However, eight spiked analytes could not be identified with multivariate curve resolution-alternating least-squares (MCR-ALS) nor parallel factor anal. (PARAFAC) due to background contamination. Analyte identification was achieved with class comparison enabled-mass spectrum purification (CCE-MSP), which obtains a pure analyte spectrum by normalizing the spectra to an interferent mass channel (m/z) identified from 1v1 anal. and subtracting the two spectra. This report also details the development of CCE-MSP assisted MCR-ALS, which removes the identified interferent m/z from the data prior to decomposition In total, 17 out of 18 spiked analytes had a match value (MV) > 800 with both versions of CCE-MSP. For example, MCR-ALS and PARAFAC were unable to decompose the pure spectrum of Me decanoate (MVs < 200) due to its low 2D chromatog. resolution (~0.34) and high interferent-to-analyte signal ratio (~30:1). By leveraging information gained from 1v1 anal., CCE-MSP and CCE-MSP assisted MCR-ALS obtained a pure spectrum with an average MV of 908 and 964, resp. Furthermore, tile-based 1v1 anal. was applied to track moisture damage in cacao beans, where 86 analytes with at least a 2-fold concentration change were discovered between the unmolded and molded samples. This 1v1 anal. workflow is beneficial for studies where multiple replicates are either unavailable or undesirable to save anal. time. The experimental procedure involved many compounds, such as 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). Computed Properties of C16H34O

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Related Products of 119-47-1In 2022, Shi, Jinyu;Sun, Dezhi;Dang, Yan;Qu, Dan published 《Characterizing the degradation of refractory organics from incineration leachate membrane concentrate by VUV/O₃》. 《Chemical Engineering Journal (Amsterdam, Netherlands)》published the findings. The article contains the following contents:

In this study, we used a combined vacuum-UV (VUV) and O₃ process treating the chem. precipitation pre-treated incineration leachate membrane concentrate to further decompose substantial refractory organics which led to membrane organic fouling in the subsequent membrane distillation process. The highest removal of COD (88.1%) was achieved when 50 mg/min of O₃ dosage was used at a pH of 11.5-12. Multi-spectrum methods, mol. weight distribution (MW), gas chromatog.-mass spectrometry (GC-MS), two-dimensional correlation spectroscopy (2D-COS), and hetero-spectral 2D-COS were used to investigate the organics degradation mechanism. The combined action of O₃ and hydroxyl radicals (·OH) effectively degraded macromol. organics with high aromaticity and high conjugation (mainly distributed at 1-3 kDa) into aliphatic products with lower mol. weight (<1 kDa) and simple structures. The order of organics that were oxidized were humic-like acids > fulvic-like acids > protein-like substances. Organic acids (acetate, propionate, and butyrate) also accumulated in the VUV/O₃ systems. And 2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) was used in the research process.

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

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Jia, Jialin;Liu, Dongmei;Wang, Songxue;Li, Huarui;Ni, Jiaxin;Li, Xiaobo;Tian, Jiayu;Wang, Qiao published 《Visible-light-induced activation of peroxymonosulfate by TiO₂ nano-tubes arrays for enhanced degradation of bisphenol A》. The research results were published in《Separation and Purification Technology》 in 2020.Reference of 4-(2-Phenylpropan-2-yl)phenol The article conveys some information:

TiO₂ photocatalysis and peroxymonosulfate (PMS) oxidation can exhibit a good performance in UV light but a less activity in visible light (VL). Herein, the TiO₂ nano-tubes arrays (TiO₂NTAs) and PMS were combined to degrade bisphenol A (BPA) under VL irradiation Surprisingly, about 94.6% of BPA was removed in TiO₂NTAs/PMS/VL system within 30 min, which was much higher than that of TiO₂NTAs/VL (20.1%) and PMS/VL (9.4%) systems. A series of spectroscopic characterizations and photoelectrochem. measurements confirmed the formation of PMS-TiO₂ complex with VL response, which can be excited by VL to transfer electrons to the conduction band (CB) of TiO₂ for activating PMS. The quenching tests and ESR (ESR) spectra indicated that SO^·-₄ and ·OH were responsible for BPA degradation, and then the possible degradation pathways of BPA were proposed. Humic acid (HA) and chloride ions (Cl^–) significantly enhanced the BPA degradation, while bicarbonate (HCO^–₃) and phosphate (H₂PO^–₄) exhibited an inhibition effect. Moreover, TiO₂NTAs/PMS/VL system displayed an enhanced BPA degradation in tap water and drinking water compared with deionized water, and as an immobilization catalyst which fabricated on Ti plate, TiO₂NTAs exhibited excellent stability and separability without complex catalyst separation/recovery processes. We believe this work will provide a new insight of the VL-induced photocatalytic PMS activation in practical water treatment. 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.Reference 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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