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1. The formation of PBDFs from the ortho-disubstituted phenol precursors: A comprehensive theoretical study on the PBDD/Fs formation from 2,4,6-tribromophenol

Author:
Chang, Jiamin; Pan, Wenxiao; Liu, Xian; Xue, Qiao; Fu, Jianjie; Zhang, Aiqian
Source:
The Science of the total environment 2020 v.713 pp. 136657
ISSN:
0048-9697
Subject:
phenol,   etc   ; bromination; dibenzofuran; thermodynamics; toxicity;     Show all 5 Subjects
Abstract:
... Bromophenols are known as direct precursors of the notorious polybrominated dibenzo-p-dioxin/dibenzofurans (PBDD/Fs). There is a long-held viewpoint that only the more toxic dioxin-type products could be formed from the ortho-disubstituted phenols, totally contrary to the experimental observations that both PBDDs and PBDFs are generated. To tackle the issue, the gaseous formation mechanism of PBDD ...
DOI:
10.1016/j.scitotenv.2020.136657

2. Thermal [2 + 2]-cycloaddition between silylalkynes and allenylphenols followed by the nucleophilic addition of water: metal-free and economical synthesis of arylcyclobutenals

Author:
Ohno, Shohei; Avena, Ramon Francisco; Aoyama, Hiroshi; Fujioka, Hiromichi; Arisawa, Mitsuhiro
Source:
Green chemistry 2020 v.22 no.4 pp. 1220-1228
ISSN:
1463-9270
Subject:
phenols,   etc   ; Lewis bases; alkynes; green chemistry;     Show all 4 Subjects
Abstract:
... Herein, we report an unprecedented thermal [2 + 2]-cycloaddition between silylalkynes and allenylphenols to form an aromatizing cyclobutachromene intermediate, followed by the nucleophilic addition of water to yield functionalized arylcyclobutenals. This reaction is atom- and pot-economical because all the atoms contained in the starting material are retained in the final product, no other reactan ...
DOI:
10.1039/c9gc04184b

3. SNAr azidation of phenolic functions utilizing diphenyl phosphorazidate

Author:
Ishihara, Kotaro; Shioiri, Takayuki; Matsugi, Masato
Source:
Tetrahedron letters 2020 v.61 no.7 pp. 151493
ISSN:
0040-4039
Subject:
phenol,   etc   ; azides; chemical reactions; chemical structure;     Show all 4 Subjects
Abstract:
... A useful method for the synthesis of aryl azides via SNAr reaction of phenol derivatives using diphenyl phosphorazidate (DPPA) as an azidation reagent was developed. Various phenol derivatives bearing electron-withdrawing groups were converted into the corresponding aryl azides in a single step. This method is easy to perform and enables the preparation of aryl azides without the use of explosive ...
DOI:
10.1016/j.tetlet.2019.151493

4. Mechanism of the temperature-responsive material regulating porous morphology on epoxy phenolic novolac resin microcapsule surface

Author:
Zhang, Xianpeng; Zhang, Luxia; Zhang, Daxia; Liu, Sisi; Wei, Dengguo; Liu, Feng
Source:
Colloids and surfaces 2020 v.593 pp. 124581
ISSN:
0927-7757
Subject:
phenols,   etc   ; encapsulation; epoxides; lipophilicity; solubility; strength (mechanics); surface area; temperature;     Show all 8 Subjects
Abstract:
... Porous microcapsules (MCs) with tailorable surface morphology are indispensable in practical applications because of their large surface area and controlled release. In this study, epoxy phenolic novolac resin MCs were prepared with temperature-responsive 2,4,6-tris(dimethylaminomethyl)phenol (DMP) as crosslinker. Reaction temperature was proved to generate distinct effects on MC porous morphology ...
DOI:
10.1016/j.colsurfa.2020.124581

5. Correction to: a new Rhodococcus aetherivorans strain isolated from lubricant-contaminated soil as a prospective phenol-biodegrading agent

Author:
Nogina, Taisiya; Fomina, Marina; Dumanskaya, Tatiana; Zelena, Liubov; Khomenko, Lyudmila; Mikhalovsky, Sergey; Podgorskyi, Valentin; Gadd, Geoffrey Michael
Source:
Applied microbiology and biotechnology 2020 v.104 no.8 pp. 3689-3690
ISSN:
0175-7598
Subject:
phenols,   etc   ; Rhodococcus aetherovorans; biodegradation; polluted soils; soil pollution;     Show all 5 Subjects
Abstract:
... The published online version contains mistake in Table 3. ...
DOI:
10.1007/s00253-020-10489-z

6. Stereoselective synthesis of para-quinone monoketals through tri-bromide (TBr) mediated oxidative dearomatization of phenols

Author:
Sahoo, Sushree Ranjan; Sarkar, Debayan
Source:
Tetrahedron letters 2020 v.61 no.12 pp. 151646
ISSN:
0040-4039
Subject:
phenols,   etc   ; chemical reactions; chemical structure; hydrogen; palladium; quinones; stereoselective synthesis;     Show all 7 Subjects
Abstract:
... A metal free one-pot stereoselective synthesis of para-quinone monoketals and their derivatives has been reported in this present work. Tri-bromides (TBrs) have been employed as an effective reagent for intramolecular spirocyclizations leading to excellent yields of the monoketals. The TBrs are slowly turning out to be an important reagent for oxidative dearomatization which is further attested in ...
DOI:
10.1016/j.tetlet.2020.151646

7. M[TPP]Cl (M = Fe or Mn)-Catalyzed Oxidative Amination of Phenols by Primary and Secondary Anilines

Author:
Vershinin, Vlada; Pappo, Doron
Source:
Organic letters 2020 v.22 no.5 pp. 1941-1946
ISSN:
1523-7052
Subject:
phenols,   etc   ; amination; benzoquinones; catalytic activity; chemical structure; dehydrogenation; iron; manganese;     Show all 8 Subjects
Abstract:
... Iron- and manganese-catalyzed para-selective oxidative amination of (4-R)phenols by primary and secondary anilines was developed. Depending on the identity of the R group, the products of this efficient reaction are either benzoquinone anils (C–N coupling) that are produced via a sequential oxidative amination/dehydrogenation (R = H), oxidative amination/elimination (R = OMe) steps, or N,O-biaryl ...
DOI:
10.1021/acs.orglett.0c00296

8. FeCl3 catalyzed 1,6-conjugate addition of phenol C-nucleophiles: Facile synthesis of diarylmethanes

Author:
Sreenivas, Kukkamudi; Khan, Faiz Ahmed
Source:
Tetrahedron 2020 v.76 no.6 pp. 130885
ISSN:
0040-4020
Subject:
phenol,   etc   ; aromatization; catalytic activity; ferric chloride; moieties; quinones;     Show all 6 Subjects
Abstract:
... An efficient synthesis of diarylmethane derivatives from phenol and a p-quinone methide surrogate cyclohexadienone derivative has been described. This 1,6-conjugate addition reaction is catalyzed by earth abundant FeCl₃ and it proceeds via a consecutive Michael type addition followed by aromatization. Various proportions of phenol and cyclohexadienone produced exclusively mono, bis and tris additi ...
DOI:
10.1016/j.tet.2019.130885

9. Enhancing thermal properties of polybenzoxazine by incorporation of 4-cyanophenol

Author:
Zhu, Yongfei; Su, Junming; Lin, Runsheng; Jiang, Yuhua; Li, Peilin
Source:
Thermochimica acta 2020 v.683 pp. 178465
ISSN:
0040-6031
Subject:
phenol,   etc   ; carbon dioxide; polymerization; thermal degradation; thermal properties; volatilization;     Show all 6 Subjects
Abstract:
... In order to study the effect of strong electron-withdrawing group on thermal properties of polybenzoxazine, 4-cyanophenol-based benzoxazines were prepared and their cured samples were investigated by FTIR, TGA, TGA-FTIR, Py-GC–MS and LOI tests. FTIR results indicate that nitrile group hardly polymerized and existed in polybenzoxazine at present cured conditions. TGA results show that the introduct ...
DOI:
10.1016/j.tca.2019.178465

10. Kinetics of PMS activation by graphene oxide and biochar

Author:
Wang, Shizong; Wang, Jianlong
Source:
Chemosphere 2020 v.239 pp. 124812
ISSN:
0045-6535
Subject:
phenol,   etc   ; adsorption; biochar; carbon; catalysts; graphene oxide; kinetics; moieties; pollutants;     Show all 9 Subjects
Abstract:
... Carbon-based materials have been studied as metal-free catalyst for persulfate activation. At present, the activation performance of carbon materials for persulfate is usually characterized by the removal efficiency of organic pollutants. However, the kinetics of persulfate activation by carbon materials has not been investigated. In this study, the kinetics of peroxymonosulfate (PMS) activation b ...
DOI:
10.1016/j.chemosphere.2019.124812

11. Impact of the saturation level on the electrochemical regeneration of activated carbon in a single sequential reactor

Author:
Garcia-Rodriguez, Orlando; Villot, Audrey; Olvera-Vargas, Hugo; Gerente, Claire; Andres, Yves; Lefebvre, Olivier
Source:
Carbon 2020 v.163 pp. 265-275
ISSN:
0008-6223
Subject:
phenol,   etc   ; activated carbon; adsorption; electrochemistry; energy; industrial wastewater; mineralization; pollutants; polymers; porosity;     Show all 10 Subjects
Abstract:
... The removal of non-biodegradable organics from industrial wastewater through adsorption onto activated carbon (AC) is a simple, effective and inexpensive process; however, as with any separation technology there is a need to regenerate the exhausted material. Here, electrochemical regeneration of AC was carried out in a single reactor alternating sequences of adsorption and regeneration. A key fin ...
DOI:
10.1016/j.carbon.2020.02.041

12. Inhibitory effect of phenol on wastewater ammonification

Author:
Rongsayamanont, Chaiwat; Khongkhaem, Piyamart; Luepromchai, Ekawan; Khan, Eakalak
Source:
Bioresource technology 2020 v.309 pp. 123312
ISSN:
0960-8524
Subject:
phenol,   etc   ; Acinetobacter; Nitrosomonas europaea; Pseudomonas putida; ammonia; ammonification; bacteria; dissolved organic nitrogen; mixed culture; wastewater;     Show all 10 Subjects
Abstract:
... This study aimed to elucidate inhibitory effect of phenol on ammonification of dissolved organic nitrogen (DON) in wastewater. Laboratory incubation experiments were conducted using primary and secondary effluent samples spiked with phenol (100–1000 mg/L) and inoculated with mixed cultures, pure strains of phenol-degrading bacteria (Acinetobacter sp. and Pseudomonas putida F1), and/or an ammonia o ...
DOI:
10.1016/j.biortech.2020.123312

13. Accelerated photoelectron transmission by carboxymethyl β-cyclodextrin for organic contaminants removal: An alternative to noble metal catalyst

Author:
Zhou, Yi; Liu, Qiming; Lu, Jian; He, Jie; Liu, Yongdi; Zhou, Yanbo
Source:
Journal of hazardous materials 2020 v.393 pp. 122414
ISSN:
0304-3894
Subject:
phenol,   etc   ; beta-cyclodextrin; bisphenol A; catalysts; hydrophobicity; irradiation; nanogold; nanoparticles; photocatalysis; photooxidation; titanium dioxide; ultraviolet radiation;     Show all 12 Subjects
Abstract:
... Applications of noble metal decorated photocatalytic nanomaterials are restricted by its high cost. In this study, carboxymethyl β-cyclodextrin (CM-β-CD), as an alternative to gold nanoparticle, was used to modified titanium dioxide (CM-β-CD-P25) to accelerate photoelectron transmission and enhance the organic contaminants removal from water. Several of emerging organic contaminants, such as bisph ...
DOI:
10.1016/j.jhazmat.2020.122414

14. Effects of the formation of reactive chlorine species on oxidation process using persulfate and nano zero-valent iron

Author:
Kim, Cheolyong; Thao, Trinh Thi; Kim, Jae-Hyuk; Hwang, Inseong
Source:
Chemosphere 2020 v.250 pp. 126266
ISSN:
0045-6535
Subject:
phenol,   etc   ; chlorides; chlorine; corrosion; free radicals; iron; oxidants; oxidation; reaction kinetics; reaction mechanisms; saline water; sulfates;     Show all 12 Subjects
Abstract:
... The chloride ion (Cl⁻) is a matrix ion that plays crucial roles in radical-based oxidation processes used to treat brackish or saline water. Here, the effects of the formation of reactive chlorine species on the performance of and reaction mechanisms involved in persulfate/nano zero-valent iron process were evaluated by investigating the reaction kinetics and performing reactive species scavenging ...
DOI:
10.1016/j.chemosphere.2020.126266

15. Ultrasound acoustic cavitation enhances depolymerization of organosolv lignin to phenolic monomers and low molecular weight lignin bio-oils

Author:
Liu, Bingyang; Du, Boyu; Sun, Yang; Zhu, Mengni; Yang, Yingying; Wang, Xing; Zhou, Jinghui
Source:
Fuel processing technology 2020 v.203 pp. 106387
ISSN:
0378-3820
Subject:
phenol,   etc   ; acoustics; benzene; biofuels; depolymerization; lignin; liquids; molecular weight; temperature; ultrasonics; value added;     Show all 11 Subjects
Abstract:
... Lignin-first is a strategy for producing value-added phenolics and high-quality bio-oils from lignin. To contribute to this strategy, we investigated the effects of ultrasound acoustic cavitation on depolymerization of organosolv lignin to phenolic monomers and low molecular weight lignin bio-oils. We achieved the highest lignin bio-oil yield of 56.9 wt% at a temperature of 250 °C, a reaction time ...
DOI:
10.1016/j.fuproc.2020.106387

16. Efficient activation of intercalated persulfate via a composite of reduced graphene oxide and layered double hydroxide

Author:
Huang, Xin; Su, Qingqing; Han, Shaohong; Zhou, Jizhi; Qian, Guangren; Gao, Naiyun
Source:
Journal of hazardous materials 2020 v.389 pp. 122051
ISSN:
0304-3894
Subject:
phenol,   etc   ; bisphenol A; electron paramagnetic resonance spectroscopy; free radicals; graphene; graphene oxide; moieties; oxidation; oxygen; remediation;     Show all 10 Subjects
Abstract:
... Efficient activation of peroxydisulfate (PDS, S₂O₈²⁻) was achieved in this study by a hybrid of reduced graphene oxide (rGO) and layered double hydroxide (LDH). The peroxydisulfate was intercalated into the interlayers of LDH that was combined with rGO. This sample contributed to 92.4 % of phenol (PhOH) removal at 25 °C with a PDS loading amount of 0.4 mmol/g, which is better than its LDH-PDS coun ...
DOI:
10.1016/j.jhazmat.2020.122051

17. Computational studies of the mechanism of Pd-Catalyzed Intramolecular Friedel–Crafts allylic alkylation of phenols

Author:
Kuribara, Takahito; Matsumoto, Koki; Nagasawa, Sho; Suzuki, Yuta; Nakajima, Masaya; Hamada, Yasumasa; Nemoto, Tetsuhiro
Source:
Tetrahedron 2020 v.76 no.18 pp. 131146
ISSN:
0040-4020
Subject:
phenol,   etc   ; alkylation; allylation; catalytic activity; chemical structure; density functional theory; palladium;     Show all 7 Subjects
Abstract:
... We previously reported a synthetic method of spirocyclohexadienones using an Pd-catalyzed intramolecular ipso-Friedel–Crafts allylic alkylation of para-substituted phenol derivatives. However, the mechanism for the step leading to spirocyclization and driving force behind the remarkably easier formation of the five-membered spirocyclohexadienone as compared with the six-membered spirocyclohexadien ...
DOI:
10.1016/j.tet.2020.131146

18. A Simple Approach to the Toxicity Prediction of Anilines and Phenols Towards Aquatic Organisms

Author:
Muhire, Jules; Li, Bao Qiong; Zhai, Hong Lin; Li, Sha Sha; Mi, Jia Ying
Source:
Archives of environmental contamination and toxicology 2020 v.78 no.4 pp. 545-554
ISSN:
0090-4341
Subject:
phenols,   etc   ; aquatic organisms; chemical pollutants; models; pollution; prediction; quantitative structure-activity relationships; toxicity;     Show all 8 Subjects
Abstract:
... Chemicals pollution in the environment has attracted attention all over the world, and the toxicity prediction of chemical pollutants has become quite important. In this paper, we introduce a simple approach to predict the toxicity of some chemical components, in which the Tchebichef image moment (TM) method was employed to extract useful chemical information from the images of molecular structure ...
DOI:
10.1007/s00244-019-00703-z

19. Brettanomyces bruxellensis phenotypic diversity, tolerance to wine stress and wine spoilage ability

Author:
Cibrario, Alice; Miot-Sertier, Cécile; Paulin, Margot; Bullier, Bastien; Riquier, Laurent; Perello, Marie-Claire; de Revel, Gilles; Albertin, Warren; Masneuf-Pomarède, Isabelle; Ballestra, Patricia; Dols-Lafargue, Marguerite
Source:
Food microbiology 2020 v.87 pp. 103379
ISSN:
0740-0020
Subject:
phenol,   etc   ; aeration; carbohydrates; ethanol; genetic variation; genotype; pH; phenotype; phenotypic variation; spoilage; sulfur dioxide; wines; yeasts;     Show all 13 Subjects
Abstract:
... Brettanomyces bruxellensis is a yeast species found in many fermented matrices. A high level of genetic diversity prevails in this species and was recently connected with tolerance to sulfur dioxide, the main preservative used in wine. We therefore examine other phenotypes that may modulate the ability of the species to spoil wine, in a selection of representative strains. The species shows a fair ...
DOI:
10.1016/j.fm.2019.103379

20. Physical and biochemical bases of resistance in groundnut against bruchid, Caryedon serratus (Olivier)

Author:
Sreedhar, M.; Singh, D.V.; Shahi, U.P.; Chandrasekhar Reddy, D.V.
Source:
Journal of stored products research 2020 v.87 pp. 101594
ISSN:
0022-474X
Subject:
phenols,   etc   ; Caryedon serratus; entomology; laboratory experimentation; peanuts; pods; proteins; screening; sugars; tannins;     Show all 10 Subjects
Abstract:
... A laboratory experiment was taken to study the “physical and biochemical basis of resistance in groundnut against bruchid, Caryedon serratus (Olivier)” at department of entomology, college of agriculture, svpua&t, Meerut during August 2018 to February 2019. Varietal screening of groundnut pods against bruchid were carried out with ten varieties and the performance of the varieties was assessed bas ...
DOI:
10.1016/j.jspr.2020.101594