Tag: 200-300

Synthetic Route of C14H22O《Occurrence and Fate of Triclosan and Triclocarban in Selected Wastewater Systems across Durban Metropolis, KwaZulu-Natal, South Africa》 was published in 2022. The authors were Bakare, Babatunde Femi;Adeyinka, Gbadebo Clement, and the article was included in《International Journal of Environmental Research and Public Health》. The author mentioned the following in the article:

Triclosan (TCS) and triclocarban (TCC) are antimicrobial agents that have been used in personal care and consumer products in the past decades. In this study, influent, effluent, and sludge samples collected in selected wastewater treatment plants across the Durban metropolis were qual. and quant. investigated. It was revealed that the concentration of TCS ranged from 1.906 to 73.462μg/L, from 1.732 to 6.980μg/L, and from 0.138 to 2.455μg/kg in influent, effluent, and sludge samples, resp. The concentrations of TCC were found to be between 0.320 and 45.261μg/L, <LOQ-1.103μg/L, and from 0.107 to 8.827μg/kg in the influent, effluent, and sludge samples, resp. Higher concentrations of TCS as compared with TCC were observed in the aqueous samples. However, the concentrations of TCC in the sludge samples were significantly higher than the level of TCS. More water solubility of TCS could be responsible for the observed trend in the influent and effluent samples, while the trend observed in the sludge could be due to the more hydrophobicity character of TCC. The results of this study indicated that substantial amounts of TCS and TCC are been removed during the treatment process which could be a major reason for the decline in the levels recorded in the effluent samples, therefore, reducing the amount of the TCS and TCC that would eventually end up in the surface rivers. Qual. analyses of the samples indicated the presence of caffeine, tert-butylhydroquinone, chloroxylenol, phenol, 4-(1,1,3,3-tetra-Me butyl), and dimethyl-bisphenol A. Further investigative ecol. risk assessment studies are crucial due to the potential threat the contaminants may pose to aquatic lives and humans. 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).Synthetic Route of C14H22O

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Wang, Xuan;Yu, Liangmin;Liu, Yujing;Jiang, Xiaohui published 《Synthesis and fouling resistance of capsaicin derivatives containing amide groups》 in 2020. The article was appeared in 《Science of the Total Environment》. They have made some progress in their research.SDS of cas: 599-64-4 The article mentions the following:

Capsaicin, which inhibits the attachment and growth of fouling organisms, is a bioactive substance that is generally recognized as a highly active environmental algaecide agent. Its derivatives are simple in structure and have been proven to have low toxicity and be environmentally friendly. Six capsaicin derivatives were synthesized via Friedel-Crafts alkylation and characterized using m.p. (MP) anal., IR spectroscopy, NMR (¹H NMR) spectroscopy and high-resolution mass spectrometry (HRMS). The inhibition effect and toxicity of these compounds towards Phaeodactylum tricornutum (P. tricornutum), Skeletonema costatum (S. costatum) and Chaetoceros curvisetus (C. curvisetus) were tested. The capsaicin derivatives all showed inhibitory effects. In particular, compound E with over 95% (3 mg·L^-1) inhibition and intermediate toxicity was superior to the other compounds, reflecting an environmentally friendly effect. This finding indicates that capsaicin derivatives possess the potential to become environmentally friendly algaecide agents. The fouling resistance of capsaicin derivatives incorporated into the coatings as antifouling agents was measured in the marine environment. The results showed that capsaicin derivatives possess excellent fouling resistance, with only a small amount of algae and muck attached to the tested panel at 90 days. The above results provide a scientific basis for the application of capsaicin derivatives as environmentally friendly antifouling agents. 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.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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Category: alcohols-buliding-blocks《Development of β-cyclodextrin crosslinked citric acid encapsulated in polypropylene membrane protected-μ-solid-phase extraction device for enhancing the separation and preconcentration of endocrine disruptor compounds》 was published in 2022. The authors were Hafiz Rozaini, Muhammad Nur’;Saad, Bahruddin;Lim, Jun Wei;Yahaya, Noorfatimah;Ramachandran, Muggundha Raoov;Kiatkittipong, Worapon;Mohamad, Mardawani;Chan, Yi Jing;Goh, Pei Sean;Shaharun, Maizatul Shima, and the article was included in《Chemosphere》. The author mentioned the following in the article:

Endocrine disruptor compounds (EDCs) such as plasticisers, surfactants, pharmaceutical products, personal care products and pesticides are frequently released into the environmental waters. Therefore, a sensitive and environmentally friendly method is entailed to quantify these compounds at their trace level concentrations This study encapsulated the β-cyclodextrin crosslinked with citric acid in a polypropylene membrane protected-μ-solid phase extraction (BCD-CA μ-SPE) device for preconcg. the EDCs (triclosan, triclocarban, 2-phenylphenol, 4-tert-octylphenols and bisphenol A) in real water samples before the anal. by high-performance liquid chromatog. FT-IR and TGA results indicated that BCD-CA was successfully synthesized with the formation of ester linkage (1078.33 cm^-1) and O-H stretching from carboxylic acid (3434.70 cm^-1) with higher thermal stability as compared with native CD with the remaining weight above 72.1% at 500°C. Several critical parameters such as the sorbent loading, type and amount of salts, extraction time, sample volume, sample pH, type and volume of desorption solvents and desorption time were sequentially optimized and statistically validated. Under the optimum condition, the use of BCD-CA μ-SPE device had manifested good linearity (0.5-500μg L^-1) with the determination of the coefficient range of 0.9807-0.9979. The p-values for the F-test and t-test (6.60 x 10^-8 – 1.77 x 10^-5) were lesser than 0.05 and low detection limits ranging from 0.27 to 0.84μg L^-1 for all studied EDCs. The developed technique was also successfully applied for EDC analyses in four distinct real water samples, namely, wastewater, river water, tap water and mineral water, with good EDCs recoveries (80.2%-99.9%), low relative standard deviations (0.1%-3.8%, n = 3) with enrichment factor ranging from 9 to 82 folds. These results signified the potential of the BCD-CA μ-SPE device as an efficient, sensitive, and environmentally friendly approach for analyzing EDCs. And 4-tert-Octylphenol (cas: 140-66-9) was used in the research process.

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

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Chen, Zhuo;Wang, Dan;Dao, Guohua;Shi, Qi;Yu, Tong;Guo, Fang;Wu, Guangxue published 《Environmental impact of the effluents discharging from full-scale wastewater treatment plants evaluated by a hybrid fuzzy approach》. The research results were published in《Science of the Total Environment》 in 2021.Related Products of 140-66-9 The article conveys some information:

Increasing attention is being paid to the environmental impacts of wastewater treatment plant (WWTP) effluent. In this study, comprehensive environmental impact analyses (EIAs) were performed for the secondary treatment processes, tertiary treatment processes, and entire plants at five full-scale WWTPs in Kunming, China. The EIAs took into account greenhouse gas (GHG) emissions, potential for the effluent to cause eutrophication, ecol. risks posed by endocrine disrupting compounds (EDCs) in treated effluent, and the risks posed by heavy metals in excess sludge. A comprehensive assessment toward environmental sustainability was performed using a fuzzy approach. The results indicated that the biol. treatment process made the largest contribution (>68% of the total) of the secondary treatment processes to GHG emissions and that electricity consumption made the largest contribution (>64% of the total) of the tertiary treatment processes to GHG emissions. Large numbers of EDCs were removed during the secondary treatment processes, but the potential ecol. risks posed by EDCs still require attention. High mercury concentrations were found in excess sludge. The plant that removed the largest proportion of pollutants and produced effluent posing the least ecol. risks gave the best comprehensive EIA performance. 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).Related Products of 140-66-9

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Formula: C14H14O2《Iron-catalyzed one-pot synthesis of quinoxalines: transfer hydrogenative condensation of 2-nitroanilines with vicinal diols》 was published in 2021. The authors were Putta, Ramachandra Reddy;Chun, Simin;Lee, Seok Beom;Hong, Junhwa;Oh, Dong-Chan;Hong, Suckchang, and the article was included in《RSC Advances》. The author mentioned the following in the article:

Here, iron-catalyzed one-pot synthesis of quinoxalines via transfer hydrogenative condensation of 2-nitroanilines with vicinal diols was reported. The tricarbonyl (η⁴-cyclopentadienone) iron complex, which was well known as the Knolker complex, catalyzed the oxidation of alcs. and the reduction of nitroarenes, and the corresponding carbonyl and 1,2-diaminobenzene intermediates were generated in situ. Trimethylamine N-oxide was used to activate the iron complex. Various unsym. and sym. vicinal diols were applied for transfer hydrogenation, resulting in quinoxaline derivatives in 49-98% yields. A plausible mechanism was proposed based on a series of control experiments The major advantages of this protocol were that no external redox reagents or addnl. base was needed and that water is liberated as the sole byproduct. 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 Formula: C14H14O2) 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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Lee, Sangsuk;Straub, Anthony P. published 《Analysis of Volatile and Semivolatile Organic Compound Transport in Membrane Distillation Modules》 in 2022. The article was appeared in 《ACS ES&T Engineering》. They have made some progress in their research.HPLC of Formula: 140-66-9 The article mentions the following:

Membrane distillation (MD) is an emerging water treatment process that offers near-complete removal of nonvolatile contaminants. However, the transport of volatile compounds in the process is highly varied and poorly understood. In this work, we investigate the transport of a wide range of semivolatile and volatile compounds in membrane distillation (55 compounds total) allowing us to gain broad insights into the compound properties, system designs, and operating conditions that impact transport rates in direct-contact MD. We first use exptl. verified simulations to study the effects of different mol. properties on transport and show that the Henry’s constant and diffusion coefficient are the most important mol. properties in determining solute flux. We then study the transport resistances across MD membranes and find distinct transport regimes dominated by resistances associated with either diffusion through the membrane or boundary layers on either side of the membrane. Simulations of large-scale MD modules reveal the impact of membrane area, operating temperature, and crossflow velocity on the removal of contaminants. Finally, we comprehensively compare the removal of different classes of contaminants between MD and RO, finding that MD is more effective in removing small neutral compounds with low volatility. Overall, the results of this work demonstrate important compound properties and operating conditions that control volatile mass transport in MD. 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.HPLC of Formula: 140-66-9 It has been shown to cause harm to vertebrate male reproductive systems.

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HPLC of Formula: 599-64-4In 2021, Shi, Junbin;Wang, Yubin;Bu, Qingqing;Liu, Binyuan;Dai, Bin;Liu, Ning published 《Cr-Catalyzed Direct ortho-Aminomethylation of Phenols》. 《Journal of Organic Chemistry》published the findings. The article contains the following contents:

A Cr-catalyzed strategy for the regioselective formation of Csp²-Csp³ bonds through the direct and efficient ortho-aminomethylation of N,N-dimethylanilines with phenols is reported. The approach showed excellent site selectivity at the ortho-position of phenols and accommodated broad substrate scope and functional group compatibility for both N,N-dimethylanilines and phenols. Mechanistic studies revealed that the direct ortho-aminomethylation between N,N-dimethylanilines and phenols occurred via an ionic mechanism. 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.HPLC of Formula: 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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Siu, Timothy C.;Silva, Israel Jr;Lunn, Maiko J.;John, Alex published 《Influence of the pendant arm in deoxydehydration catalyzed by dioxomolybdenum complexes supported by amine bisphenolate ligands》 in 2020. The article was appeared in 《New Journal of Chemistry》. They have made some progress in their research.SDS of cas: 579-43-1 The article mentions the following:

Dioxomolybdenum complexes supported by aminebisphenolate ligands were evaluated for their potential in catalyzing the deoxydehydration (DODH) reaction to establish structure-activity relationships. The nature of the pendant arm in these aminebisphenolate ligands was found to be crucial in determining reactivity in the deoxydehydration of styrene glycol (1-phenyl-1,2-ethanediol) to styrene. Pendant arms bearing strongly coordinating N-based groups such as pyridyl or amino substituents were found to hinder activity while those bearing non-coordinating pendant arms (benzyl) or even weakly coordinating groups (an ether) resulted in up to 6 fold enhanced catalytic activity. A dioxomolybdenum complex featuring an aminemonophenolate ligand derived from the aminebisphenolate skeleton also resulted in similar yield enhancements. Although aromatic solvents were found to be ideal for performing these catalytic reactions, polar solvents such as N,N-dimethylformamide (DMF) and N,N’-dimethylpropyleneurea (DMPU) were also suitable. The catalyst was found to maintain its structural integrity under the optimized conditions and could be recycled for a second catalytic run without loss of activity. With the activated substrate meso-hydrobenzoin, trans-stilbene was obtained in a 56% yield at 220°C along with benzaldehyde (71%) suggesting that the diol was a competing reductant under these conditions.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 SDS of cas: 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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Pilevar, Afsaneh;Hosseini, Abolfazl;Becker, Jonathan;Schreiner, Peter R. published 《Syn-Dihydroxylation of Alkenes Using a Sterically Demanding Cyclic Diacyl Peroxide》 in 2019. The article was appeared in 《Journal of Organic Chemistry》. They have made some progress in their research.Name: rel-(1R,2S)-1,2-Diphenylethane-1,2-diol The article mentions the following:

The syn-dihydroxylation of alkenes is a highly valuable reaction in organic synthesis. Cyclic acyl peroxides (CAPs) have emerged recently as promising candidates to replace the commonly employed toxic metals for this purpose. Here, we demonstrate that the structurally demanding cyclic peroxide spiro[bicyclo[2.2.1]heptane-2,4′-[1,2]dioxolane]-3′,5′-dione (P4) can be effectively used for the syn-dihydroxylation of alkenes. Reagent P4 also shows an improved selectivity for dihydroxylation of alkenes bearing β-hydrogens as compared to other CAPs, where both diol and allyl alc. products compete with each other. Furthermore, the use of enantiopure P4 (labeled P4′) demonstrates the potential of P4′ for a metal-free asym. syn-dihydroxylation of alkenes. And rel-(1R,2S)-1,2-Diphenylethane-1,2-diol (cas: 579-43-1) was used in the research process.

Desymmetrization of rel-(1R,2S)-1,2-Diphenylethane-1,2-diol(cas:579-43-1 Name: 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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Related Products of 599-64-4In 2020, Yan, Xin;Yi, Chengwu;Wang, Yonghui;Cao, Wudi;Mao, Danni;Ou, Qingqing;Shen, Peiyao;Wang, Huijuan published 《Multi-catalysis of nano-zinc oxide for bisphenol A degradation in a dielectric barrier discharge plasma system: Effect and mechanism》. 《Separation and Purification Technology》published the findings. The article contains the following contents:

As a widely used chem. material, bisphenol A (BPA) is often used to produce kinds of chems., which lead risk to the ecol. environment and human health. Based on the multi-catalysis of the nano-ZnO and multi-effect (chem. and phys.) formed in the dielec. barrier discharge plasma (DBDP) system, the synergistic elimination of the BPA in the DBDP system combined with nano-ZnO was evaluated. The obtained exptl. results showed that the superior adding amount of the nano-ZnO was 50 mg/L and the synergistic system on the condition had the best effect for the BPA degradation (85.4%), which was 17% higher than that in the sole DBDP system. When O₂ was bubbled into the reaction system, the degradation efficiency of the BPA in the synergistic system reached 100% after 20 min treatment. Compared with the alk. solution, the acidic and weakly acidic solution could obtain higher treatment efficiency. ^.OH and O^–₂ had a vital role for the BPA elimination in the synergistic system. The intermediate products detected by LC-MS included 4-cumylphenol, 4-isopropenylphenol, 4-tert-butylphenol, propiophenone, 1-(4-hydroxyphenyl) ethanone, tert-butylbenzene, benzoquinone and 1,4-dihydroxybenzene. 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.Related Products of 599-64-4 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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