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1. Oxygen vacancy BiO2-x/Bi2WO6 synchronous coupling with Bi metal for phenol removal via visible and near-infrared light irradiation

Author:
Jin, Jiafeng; Sun, Jinsheng; Lv, Kaihe; Guo, Xuan; Hou, Qilin; Liu, Jingping; Wang, Jintang; Bai, Yingrui; Huang, Xianbin
Source:
Journal of colloid and interface science 2022 v.605 pp. 342-353
ISSN:
0021-9797
Subject:
phenol,   etc   ; crystal structure; elemental composition; hybridization; irradiation; moieties; oxygen; photocatalysis; photocatalysts; photolysis; surface plasmon resonance; synergism;     Show all 12 Subjects
Abstract:
... The introduction of oxygen-defects has been a versatile strategy to enhance photocatalysis efficiency. In this work, a 2D/3D Bi/BiO₂₋ₓ/Bi₂WO₆ heterojunction photocatalyst with rich oxygen-defective was in sequence prepared through a facile solvothermal method, which displays favorable photocatalytic activity towards organic contaminants under visible-NIR light irradiation. The enhancement in photo ...
DOI:
10.1016/j.jcis.2021.06.085

2. A high-nuclearity Cuᴵ/Cuᴵᴵ nanocluster catalyst for phenol degradation

Author:
Liu, Li-Juan; Zhang, Jiang-Wei; Asad, Muhammad; Wang, Zhao-Yang; Zang, Shuang-Quan; Mak, Thomas C. W.
Source:
Chemical communications 2021 v.57 no.45 pp. 5586-5589
ISSN:
1364-548X
Subject:
phenol,   etc   ; catalysts; light; photocatalysis;     Show all 4 Subjects
Abstract:
... Herein, we report a 54-nuclei copper nanocluster, [Cu₅₄S₁₃O₆(ᵗBuS)₂₀(ᵗBuSO₃)₁₂] (Cu₅₄), which is the largest atom-precise Cuᴵ/Cuᴵᴵ mix-valent cluster reported. The Cu₅₄ nanoclusters supported by TiO₂ exhibit decent photocatalytic activity for phenol degradation under visible light. This work provides a platform to explore the catalytic behaviors of Cuᴵ/Cuᴵᴵ nanosystems. ...
DOI:
10.1039/d1cc01319j

3. Gram-Scale, Seven-Step Total Synthesis of (−)-Colchicine

Author:
Liang, Xiao; Li, Lei; Wei, Kun; Yang, Yu-Rong
Source:
Organic letters 2021 v.23 no.7 pp. 2731-2735
ISSN:
1523-7052
Subject:
phenol,   etc   ; biomimetics; couplings; shortenings;     Show all 4 Subjects
Abstract:
... Herein we report a streamlined, gram-scale total synthesis of (−)-colchicine that takes only 7 easy steps, with an overall yield of 27–36%. To warrant the synthetic efficiency and practicality of (−)-colchicine, we tactically utilized a modified version of a powerful Ir-catalyzed amidation reported by Carreira to install the key chiral C-7 acetamido group, Suzuki and biomimetic phenol oxidative co ...
DOI:
10.1021/acs.orglett.1c00638

4. Synthesis of Benzothienobenzofurans via Annulation of Electrophilic Benzothiophenes with Phenols

Author:
Krishnan R., Akhil; Babu, Sheba Ann; P. R., Nitha; Krishnan, Jagadeesh; John, Jubi
Source:
Organic letters 2021 v.23 no.5 pp. 1814-1819
ISSN:
1523-7052
Subject:
phenol,   etc   ; Lewis acids; benzofurans;     Show all 3 Subjects
Abstract:
... We have developed a metal-free, mild, and green synthetic route toward benzothieno[3,2-b]benzofurans by the annulation of 3-nitrobenzothiophene with phenols. The reaction was found to be general with a range of substituted phenols. In addition, we could extend the methodology for the synthesis of pentacenes and could demonstrate the synthesis in gram-scale. Moreover, we extended the strategy for t ...
DOI:
10.1021/acs.orglett.1c00219

5. Interrupting the Barton–McCombie Reaction: Aqueous Deoxygenative Trifluoromethylation of O-Alkyl Thiocarbonates

Author:
Liu, Zhi-Yun; Cook, Silas P.
Source:
Organic letters 2021 v.23 no.3 pp. 808-813
ISSN:
1523-7052
Subject:
phenol,   etc   ; alkynes; aromatic hydrocarbons;     Show all 3 Subjects
Abstract:
... The site-selective trifluoromethylation of aliphatic systems remains an important challenge. This work describes a light-driven, copper-mediated trifluoromethylation of O-alkyl thiocarbonates. The reaction provides broad functional group tolerance (e.g., alkyne, alkene, phenol, free alcohol, electron-rich and -deficient arenes), thereby offering orthogonality and practicality for trifluoromethylat ...
DOI:
10.1021/acs.orglett.0c04039

6. Seven-Step Stereodivergent Total Syntheses of Punicafolin and Macaranganin

Author:
Shibayama, Hiromitsu; Ueda, Yoshihiro; Tanaka, Takashi; Kawabata, Takeo
Source:
Journal of the American Chemical Society 2021 v.143 no.3 pp. 1428-1434
ISSN:
1520-5126
Subject:
phenol,   etc   ; glucose; glycosides;     Show all 3 Subjects
Abstract:
... The first total syntheses of punicafolin (1) and macaranganin (2) were achieved in seven steps, respectively, from commercial α-d-glucose. The characteristic features of the synthesis are (1) sequential site-selective introduction of the adequate galloyl groups into unprotected d-glucose by a catalyst-controlled manner and (2) stereodivergent construction of the 3,6-HHDP bridge by oxidative phenol ...
DOI:
10.1021/jacs.0c10714

7. Cu-Catalyzed O-alkylation of phenol derivatives with alkylsilyl peroxides

Author:
Sakurai, Shunya; Kano, Taichi; Maruoka, Keiji
Source:
Chemical communications 2021 v.57 no.1 pp. 81-84
ISSN:
1364-548X
Subject:
phenol,   etc   ; alkylation; catalysts; ligands;     Show all 4 Subjects
Abstract:
... A Cu-catalyzed O-alkylation of phenol derivatives using alkylsilyl peroxides as alkyl radical precursors is described. The reaction proceeds smoothly under mild reaction conditions and the use of two different ligands with a Cu catalyst provides a wide range of products. A mechanistic study suggested that the reaction proceeds via a radical mechanism. ...
DOI:
10.1039/d0cc07305a

8. Designing Low-Viscosity Deep Eutectic Solvents with Multiple Weak-Acidic Groups for Ammonia Separation

Author:
Cao, Yanning; Zhang, Jiayin; Ma, Yongde; Wu, Wenquan; Huang, Kuan; Jiang, Lilong
Source:
ACS sustainable chemistry & engineering 2021 v.9 no.21 pp. 7352-7360
ISSN:
2168-0485
Subject:
phenol,   etc   ; absorption; ammonia; green chemistry;     Show all 4 Subjects
Abstract:
... Developing NH₃ separation technology with high efficiency is very meaningful for the advancement of the NH₃ synthesis process. In this work, a new class of deep eutectic solvents (DESs) were designed by pairing N,N,N′,N′-tetramethyl-1,3-propanediamine dihydrochloride ([TMPDA]Cl₂) with phenol (PhOH) at the molar ratios of 1:3∼7. [TMPDA]Cl₂ + PhOH DESs have multiple weak-acidic groups and viscositie ...
DOI:
10.1021/acssuschemeng.1c01674

9. Water Mediated Rearrangement of Alkynyl Cyclohexadienones: Access to meta-Alkenylated Phenols

Author:
Nair, Akshay M.; Halder, Indranil; Sharma, Ritu; Volla, Chandra M. R.
Source:
Organic letters 2021 v.23 no.5 pp. 1840-1845
ISSN:
1523-7052
Subject:
phenol,   etc   ; cations; utilities; water yield;     Show all 4 Subjects
Abstract:
... We report an efficient water mediated, Brønsted acid-catalyzed rearrangement of alkynyl cyclohexadienones to access meta-olefinated phenols under metal-free conditions. The reaction displayed excellent substrate scope and yields in water. Synthetic utility of the protocol was highlighted by carrying out gram scale synthesis, further functionalizations, and late stage modification. Mechanistic stud ...
DOI:
10.1021/acs.orglett.1c00245

10. Synthesis of benzofuro[3,2-b]indolines via regioselective electrooxidative coupling of indoles and phenols

Author:
Li, Keyuan; Wang, Yuan; Chen, Lijun; Li, Lei; Jia, Yanxing
Source:
Tetrahedron letters 2021 v.63 pp. 152603
ISSN:
0040-4039
Subject:
phenols,   etc   ; indoles; regioselectivity; synthesis; yields;     Show all 5 Subjects
Abstract:
... A green and regioselective electrooxidative coupling reaction between indoles and phenols for the synthesis of benzofuro[3,2-b]indolines was developed. A variety of benzofuro[3,2-b]indolines were prepared in moderate to excellent yields. A plausible mechanism was proposed. ...
DOI:
10.1016/j.tetlet.2020.152603

11. Asymmetric Total Synthesis of PD-116740

Author:
Zheng, Chaoying; Xie, Tao; He, Haibing; Gao, Shuanhu
Source:
Organic letters 2021 v.23 no.2 pp. 469-473
ISSN:
1523-7052
Subject:
phenol,   etc   ; dihydroxylation; oxidants; oxidation; stereoselectivity;     Show all 5 Subjects
Abstract:
... A new approach was developed to achieve the asymmetric total synthesis of (+)-PD-116740, an angucyclinone from the actinomycete isolate (WP 4669). A sequence of asymmetric dihydroxylation followed by oxidative cyclization was applied to stereoselectively construct the core trans-9,10-dihydrophenanthrene-9,10-diol B–C–D ring. A new Cu salt Cu(OH)OTf·NMI₂ was found to be the best oxidant to induce t ...
DOI:
10.1021/acs.orglett.0c03990

12. Synergistic chromium(VI) reduction and phenol oxidative degradation by FeS2/Fe0 and persulfate

Author:
Yang, Weichun; Li, Xiaomin; Xi, Dongdong; Li, Qi; Yang, Zhihui; Min, Xiaobo; Lin, Zhang; Liao, Qi
Source:
Chemosphere 2021 v.281 pp. 130957
ISSN:
0045-6535
Subject:
phenol,   etc   ; chromium; iron; pH; pollution; wastewater;     Show all 6 Subjects
Abstract:
... It is a challenge to simultaneously treat the combined pollutants of chromium(VI) (Cr(VI)) and organics (such as phenol) in wastewater. Here, a stable and efficient redox system based on FeS₂ sulfidated zero valent iron (FeS₂/Fe⁰) and persulfate (PS) was developed to synchronously remove Cr(VI) and phenol. 100% of phenol (10 mg/L) was oxidized in 10 min and Cr(VI) (20 mg/L) was completely reduced ...
DOI:
10.1016/j.chemosphere.2021.130957

13. Conversion of phenolic mixture to refractory resins: A resourcezation strategy for phenolic distillation residues

Author:
Zhou, Jing; Li, Xingang; Du, Jinze; He, Lin; Wang, Chengyang; Sui, Hong
Source:
Journal of hazardous materials 2021 v.414 pp. 125357
ISSN:
0304-3894
Subject:
phenol,   etc   ; carbon; distillation; ferrocenes; phenolic resins; temperature;     Show all 6 Subjects
Abstract:
... A new resourcezation way has been proposed to address the treatment challenges of the light phenolic distillation residue (LPDR) from the coal-based phenolic distillation residue. Herein, the LPDR, which was collected at 20 kPa and 220 °C from the phenolic distillation residue, has been further used to synthesize the phenolic resin (named as RPF) for MgO-C refractories. It is found that the conver ...
DOI:
10.1016/j.jhazmat.2021.125357

14. Highly efficient titanosilicate catalyst Ti-MCM-68 prepared using a liquid-phase titanium source for the phenol oxidation

Author:
Inagaki, Satoshi; Ishizuka, Ryo; Ikehara, Yuya; Odagawa, Shota; Asanuma, Kai; Morimoto, Shunsuke; Kubota, Yoshihiro
Source:
RSC advances 2021 v.11 no.6 pp. 3681-3684
ISSN:
2046-2069
Subject:
phenol,   etc   ; catalysts; catalytic activity; oxidation; titanium;     Show all 5 Subjects
Abstract:
... A highly efficient Ti-MCM-68 catalyst for phenol oxidation with H₂O₂ was prepared by a mild liquid-phase treatment for the first time. The key preparation procedures to excellent catalytic activity and high para-selectivity were the use of aqueous solutions of the Ti source and calcination at 650 °C prior to catalytic use. ...
DOI:
10.1039/d0ra10081a

15. Synthesis of an Ellagitannin Component, the Macaranoyl Group with a Tetra-ortho-Substituted Diaryl Ether Structure

Author:
Hashimoto, Hajime; Ishimoto, Takayuki; Konishi, Hayato; Hirokane, Tsukasa; Wakamori, Shinnosuke; Ikeuchi, Kazutada; Yamada, Hidetoshi
Source:
Organic letters 2020 v.22 no.17 pp. 6729-6733
ISSN:
1523-7052
Subject:
phenol,   etc   ; aromatization; bromination; moieties;     Show all 4 Subjects
Abstract:
... Herein, a practical synthesis of the macaranoyl group contained in ellagitannins, i.e., a C–O digallate structure with a tetra-ortho-substituted diaryl ether bond, is described. The methodology involved an oxa-Michael addition/elimination reaction between a brominated ortho-quinone monoketal and a phenol with a hexahydroxydiphenoyl moiety in the presence of 18-crown-6 under dark conditions, follow ...
DOI:
10.1021/acs.orglett.0c02066

16. Oxidant-Induced Azolation of Electron-Rich Phenol Derivatives

Author:
Wang, Xiaoyu; Wang, Shengchun; Gao, Yiming; Sun, He; Liang, Xing’an; Bu, Faxiang; Abdelilah, Takfaoui; Lei, Aiwen
Source:
Organic letters 2020 v.22 no.14 pp. 5429-5433
ISSN:
1523-7052
Subject:
phenol,   etc   ; drugs; methodology;     Show all 3 Subjects
Abstract:
... Since N-arylazoles are widely present in natural products, pharmaceuticals, and functional materials, it is important to develop a simple and efficient synthetic method for the synthesis of N-arylazoles. Herein, an oxidant-induced intermolecular azolation of phenol derivatives was demonstrated under catalyst-free condition. Both monoazolation and diazolation of phenols can be successfully achieved ...
DOI:
10.1021/acs.orglett.0c01796

17. Formation of new PHE plasmids in pseudomonads in a phenol-polluted environment

Author:
Elken, Eve; Heinaru, Eeva; Jõesaar, Merike; Heinaru, Ain
Source:
Plasmid 2020 v.110 pp. 102504
ISSN:
0147-619X
Subject:
phenol,   etc   ; chromosomes; operon; plasmids;     Show all 4 Subjects
Abstract:
... Several years ago, a laboratory-constructed plasmid with a single-component phenol monooxygenase gene (pheBA operon) flanked by two IS elements was released to a phenol-polluted area. During the following years, we found in the test area widely distributed pheBA operon-containing bacteria. The new pheBA⁺ strains belong predominantly to the Pseudomonas fluorescens group, and they did not arise via ...
DOI:
10.1016/j.plasmid.2020.102504

18. Development and Mechanistic Studies of Iron-Catalyzed Construction of Csp²–B Bonds via C–O Bond Activation

Author:
Geng, Shasha; Zhang, Juan; Chen, Shuo; Liu, Zhengli; Zeng, Xiaoqin; He, Yun; Feng, Zhang
Source:
Organic letters 2020 v.22 no.14 pp. 5582-5588
ISSN:
1523-7052
Subject:
phenol,   etc   ; aromatic hydrocarbons; carbamates;     Show all 3 Subjects
Abstract:
... Herein we describe an iron-catalyzed borylation of alkenyl and aryl carbamates through the activation of a C–O bond. This protocol exhibits high efficiency, a broad substrate scope, and the late-stage borylation of biorelevant compounds, thus providing potential applications in medicinal chemistry. Moreover, this method enables orthogonal transformations of phenol derivatives and also offers good ...
DOI:
10.1021/acs.orglett.0c01937

19. A New Approach to the Reduction of Alcohol Content in Red Wines: The Use of High-Power Ultrasounds

Author:
Martínez-Pérez, María Pilar; Bautista-Ortín, Ana Belén; Pérez-Porras, Paula; Jurado, Ricardo; Gómez-Plaza, Encarna
Source:
Foods 2020 v.9 no.6
ISSN:
2304-8158
Subject:
phenols,   etc   ; grapes; odors; ultrasonics;     Show all 4 Subjects
Abstract:
... Background: To obtain wines with a lower percentage of alcohol, the simplest approach would be an earlier harvest of the grapes. However, this has implications for the wine composition and quality, due to the lack of phenolic maturity that these grapes may present. A technological innovation that could help in this situation could be the use of ultrasound in wineries. Methods: Grapes were harveste ...
DOI:
10.3390/foods9060726

20. Submerged arc plasma system combined with ozone oxidation for the treatment of wastewater containing non-degradable organic compounds

Author:
Lee, Byungjin; Jo, Eun Seo; Park, Dong-Wha; Choi, Jinsub
Source:
Frontiers of environmental science & engineering 2021 v.15 no.5 pp. 90
ISSN:
2095-2201
Subject:
phenol,   etc   ; energy; mineralization; oxidation; ozone; synergism; wastewater; wastewater treatment;     Show all 8 Subjects
Abstract:
... Submerged arc plasma technology was assessed for the removal of phenols from wastewater. The OH radicals generated from the boundary between the plasma and waste solution were considered as a significant factor on the degradation reaction. In this study, the effects of highly energetic electrons released from the submerged arc plasma were mainly studied. The highly energetic electrons directly bro ...
DOI:
10.1007/s11783-020-1384-0