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1. De novo synthesis of Cr-embedded MOF-199 and derived porous CuO/CuCr₂O₄ composites for enhanced phenol hydroxylation

Author:
Huang, Yu-Yuan; Konnerth, Hannelore; Yeh, Jyun-Yi; Prechtl, Martin H. G.; Wen, Cheng-Yen; Wu, Kevin C.-W.
Source:
Green chemistry 2019 v.21 no.8 pp. 1889-1894
ISSN:
1463-9270
Subject:
phenol,   etc   ; green chemistry; hydroxylation; oxides;     Show all 4 Subjects
Abstract:
... A de novo synthesis of Cr-embedded MOF-199 was developed for the first time. This Cr-MOF-199 material was further derived into CuO/CuCr₂O₄ composites with a porous and uniform structure. The obtained bimetallic oxides with a porous structure were further applied in phenol hydroxylation. ...
DOI:
10.1039/c8gc03348j

2. Recyclable nickel-catalyzed C–H/O–H dual functionalization of phenols with mandelic acids for the synthesis of 3-aryl benzofuran-2(3H)-ones under solvent-free conditions

Author:
Tang, Zhi; Tong, Zhou; Xu, Zhihui; Au, Chak-Tong; Qiu, Renhua; Yin, Shuang-Feng
Source:
Green chemistry 2019 v.21 no.8 pp. 2015-2022
ISSN:
1463-9270
Subject:
phenols,   etc   ; antioxidants; catalysts; green chemistry; nickel;     Show all 5 Subjects
Abstract:
... Herein, we developed a protocol for the efficient synthesis of 3-aryl benzofuran-2(3H)-ones under solvent-free conditions from phenols and mandelic acids using Ni(OTf)₂ as a catalyst. A diverse range of mandelic acids and phenols undergo C–H/O–H bond dual functionalization to generate products in moderate to good or excellent yields. The nickel catalyst can be easily recycled in a test of three ru ...
DOI:
10.1039/c9gc00305c

3. Effect of hydroxypropyl-β-cyclodextrin on the cometabolism of phenol and phenanthrene by a novel Chryseobacterium sp.

Author:
Xiao, Meng; Yin, Xiangyang; Gai, Hengjun; Ma, Honglei; Qi, Yanfeng; Li, Kun; Hua, Xia; Sun, Meng; Song, Hongbing
Source:
Bioresource technology 2019 v.273 pp. 56-62
ISSN:
0960-8524
Subject:
phenol,   etc   ; Chryseobacterium; coal; phenanthrenes; solubility; toxicity; wastewater;     Show all 7 Subjects
Abstract:
... Cometabolic degradation is an effective method to remove the polycyclic aromatic hydrocarbons (PAHs) with phenol as growth substrate from coal chemical wastewater (CCW). Unfortunately, the toxicity and low solubility of PAHs always restrict their degradation. In this study, Chryseobacterium sp. H202 was firstly isolated from the aerobic segment of CCW. Then, to improve the cometabolic degradation ...
DOI:
10.1016/j.biortech.2018.10.087

4. Trideuteromethylation Enabled by a Sulfoxonium Metathesis Reaction

Author:
Shen, Zuyuan; Zhang, Shilei; Geng, Huihui; Wang, Jiarui; Zhang, Xinyu; Zhou, Anqi; Yao, Cheng; Chen, Xiaobei; Wang, Wei
Source:
Organic letters 2019 v.21 no.2 pp. 448-452
ISSN:
1523-7052
Subject:
phenols,   etc   ; amines; chemical reactions; cost effectiveness; moieties;     Show all 5 Subjects
Abstract:
... A conceptually novel sulfoxonium metathesis reaction between TMSOI and cost-effective DMSO-d₆ is developed for the efficient generation of a new trideuteromethylation reagent TDMSOI. The new reagent TDMSOI is produced highly efficiently by simply heating a mixture of TMSOI and DMSO-d₆ and directly used for subsequent trideuteromethylation in a “one-pot” operation. The preparative power of the new ...
DOI:
10.1021/acs.orglett.8b03641

5. Synthesis of 2-Aryloxy-1,3-dienes from Phenols and Propargyl Carbonates

Author:
Ishida, Naoki; Hori, Yusaku; Okumura, Shintaro; Murakami, Masahiro
Source:
Journal of the American Chemical Society 2018 v.141 no.1 pp. 84-88
ISSN:
1520-5126
Subject:
phenols,   etc   ; carbonates; moieties; stereoselectivity;     Show all 4 Subjects
Abstract:
... A convenient method for the synthesis of 1,3-dienes from readily available compounds is reported. 2-Aryoxy-1,3-dienes are produced stereoselectively by a nickel-catalyzed reaction of propargyl carbonates with phenols. Functional group tolerance is broad to allow iodo, formyl, and boryl groups. The resulting 1,3-dienes are of much synthetic value because they can participate in a wide variety of re ...
DOI:
10.1021/jacs.8b11159

6. Macrolactamization Approaches to Arylomycin Antibiotics Core

Author:
Lim, Ngiap-Kie; Linghu, Xin; Wong, Nicholas; Zhang, Haiming; Sowell, C. Gregory; Gosselin, Francis
Source:
Organic letters 2018 v.21 no.1 pp. 147-151
ISSN:
1523-7052
Subject:
phenol,   etc   ; anhydrides; antibiotics; moieties; oligomerization;     Show all 5 Subjects
Abstract:
... Two practical entries to arylomycin antibiotics core structures are investigated. In route A, the activation of l-Hpg for the key macrolactamization step is achieved in 89% yield in the presence of unprotected phenol and amine functionalities. Alternatively, a propanephosphonic acid anhydride (T3P)-promoted coupling between thel-Tyr and l-Ala moieties in route B led to a facile macrolactamization ...
DOI:
10.1021/acs.orglett.8b03603

7. Metal-free direct C-arylation of 1,3-dicarbonyl compounds and ethyl cyanoacetate: a platform to access diverse arrays of meta-functionalized phenols

Author:
Taneja, Neha; Peddinti, Rama Krishna
Source:
Chemical communications 2018 v.54 no.81 pp. 11423-11426
ISSN:
1364-548X
Subject:
phenol,   etc   ; chemical bonding; chemical reactions;     Show all 3 Subjects
Abstract:
... A base mediated, highly convenient strategy for the direct C-arylation of 1,3-dicarbonyls and cyanoacetate with various phenol derivatives as aryl partners is presented. The present work excels in forming a C–C bond at the meta-position of the phenols, which is traditionally challenging to functionalize. This protocol further leads the way to have scalable, straightforward access to phenol assimil ...
DOI:
10.1039/c8cc06235h

8. Total Synthesis of Chaetoglobin A via Catalytic, Atroposelective Oxidative Phenol Coupling

Author:
Kang, Houng; Torruellas, Carilyn; Liu, Jinchu; Kozlowski, Marisa C.
Source:
Organic letters 2018 v.20 no.18 pp. 5554-5558
ISSN:
1523-7052
Subject:
phenol,   etc   ; chemical structure; optical isomerism;     Show all 3 Subjects
Abstract:
... The first total synthesis of chaetoglobin A (1), which features a chiral axis between two identical highly oxygenated bicyclic cores, was successfully completed in 12 steps from 2,6-dimethoxytoluene. Vanadium-catalyzed oxidative phenol coupling, as a key step, enabled generation of the axial chirality. ...
DOI:
10.1021/acs.orglett.8b02183

9. Correction to: Use of non-living lyophilized Phanerochaete chrysosporium cultivated in various media for phenol removal

Author:
Pernyeszi, Tímea; Farkas, Viktor; Felinger, Attila; Boros, Borbála; Dékány, Imre
Source:
Environmental science and pollution research international 2018 v.25 no.23 pp. 23370
ISSN:
0944-1344
Subject:
phenol,   etc   ; Phanerochaete chrysosporium; freeze drying;     Show all 3 Subjects
Abstract:
... In the original publication of this paper, the Acknowledgements section is missing the statement below. ...
DOI:
10.1007/s11356-018-2000-8

10. Annulation-Induced Cascade Transformation of 5-Iodo-1,2,3-triazoles to 2-(1-Aminoalkyl)benzoxazoles

Author:
Kotovshchikov, Yury N.; Latyshev, Gennadij V.; Navasardyan, Mger A.; Erzunov, Dmitry A.; Beletskaya, Irina P.; Lukashev, Nikolay V.
Source:
Organic letters 2018 v.20 no.15 pp. 4467-4470
ISSN:
1523-7052
Subject:
phenols,   etc   ; amination; chemical structure; triazoles;     Show all 4 Subjects
Abstract:
... Base-mediated cyclization of (5-iodo-1,2,3-triazolyl)phenols was proposed as a new synthetic strategy for the in situ generation of diazoimines via electrocyclic ring opening of the fused heterocycle. Cu-catalyzed amination of the intermediate diazoalkanes was employed to develop an efficient cascade approach to functionalized benzoxazoles. ...
DOI:
10.1021/acs.orglett.8b01755

11. Asymmetric Total Syntheses of Insulicolide A, 14-O-Acetylinsulicolide A, 6β,9α-Dihydroxy-14-p-nitrobenzoylcinnamolide, and 7α,14-Dihydroxy-6β-p-nitrobenzoylconfertifolin

Author:
Lai, Yang; Zhang, Nan; Zhang, Yi; Chen, Jia-Hua; Yang, Zhen
Source:
Organic letters 2018 v.20 no.14 pp. 4298-4301
ISSN:
1523-7052
Subject:
phenol,   etc   ; chemical structure; enantioselectivity; ozonolysis;     Show all 4 Subjects
Abstract:
... Asymmetric total syntheses of insulicolide A, 14-O-acetylinsulicolide A, 6β,9α-dihydroxy-14-p-nitrobenzoyl cinnamolide, and 7α,14-dihydroxy-6β-p-nitrobenzoylconfertifolin have been achieved for the first time. The key steps in the synthesis include: (1) an iridium-catalyzed enantioselective polyene cyclization to construct the drimane core bearing two all-carbon quaternary chiral centers at C4 and ...
DOI:
10.1021/acs.orglett.8b01733

12. Synthesis and kinetics of disassembly for silyl-containing ethoxycarbonyls using fluoride ions

Author:
Camerino, Eugene; Daniels, Grant C.; Wynne, James H.; Iezzi, Erick B.
Source:
RSC advances 2018 v.8 no.4 pp. 1884-1888
ISSN:
2046-2069
Subject:
phenols,   etc   ; ambient temperature; fluorides; ions;     Show all 4 Subjects
Abstract:
... In this study, a series of silyl-containing ethoxycarbonates and ethoxycarbamates on electron poor anilines and phenols were synthesized and their kinetics of disassembly determined in real-time upon exposure to fluoride ion sources at room temperature. The results provide a greater understanding of stability and kinetics for silyl-containing protecting groups that eliminate volatile molecules upo ...
DOI:
10.1039/c7ra07876e

13. Fabrication of β-phase AgI and Bi2O3 co-decorated Bi2O2CO3 heterojunctions with enhanced photocatalytic performance

Author:
Wang, Qi; Zhang, Chenlu; Wu, Hong; Gao, Qiaoyuan; Duan, Ran; Chen, Chuncheng
Source:
Journal of colloid and interface science 2019 v.547 pp. 1-13
ISSN:
0021-9797
Subject:
phenol,   etc   ; catalysts; chromium; electric current; photocatalysis; surface area; temperature;     Show all 7 Subjects
Abstract:
... Bi2O2CO3 was co-decorated by β-phase AgI and Bi2O3 forming visible-light-active AgI(β)/Bi2O3(β)-Bi2O2CO3 composite via simply calcining AgI/Bi2O2CO3. The calcination temperature and time played vital role in regulating the structure as well as photocatalytic performance. Optimal AgI(β)/Bi2O3(β)-Bi2O2CO3 was obtained after 325 ◦C calcination for 2 h with 5% AgI. The ratio of Bi2O3 to Bi2O2CO3 was e ...
DOI:
10.1016/j.jcis.2019.03.088

14. A general-applicable model for estimating the binding coefficient of organic pollutants with dissolved organic matter

Author:
Li, Yi-Long; He, Wei; Wu, Rui-Lin; Xing, Baoshan; Xu, Fu-Liu
Source:
The Science of the total environment 2019 v.670 pp. 226-235
ISSN:
0048-9697
Subject:
phenols,   etc   ; aquatic environment; dissolved organic matter; models; pollutants; regression analysis;     Show all 6 Subjects
Abstract:
... The binding constant (Kdoc) of organic pollutants (OPs) with dissolved organic matter (DOM) is an important parameter in determining the partitioning of OPs in the aquatic environment. Most estimation models have focused on calculating the Kdoc of a specific group of OPs but failed to obtain Kdoc values of different OPs effectively over the last three decades. In this study, we attempted to build ...
DOI:
10.1016/j.scitotenv.2019.03.146

15. Chemical characterization methods for the analysis of structural extracellular polymeric substances (EPS)

Author:
Felz, Simon; Vermeulen, Pascalle; van Loosdrecht, Mark C.M.; Lin, Yue Mei
Source:
Water research 2019 v.157 pp. 201-208
ISSN:
0043-1354
Subject:
phenol,   etc   ; biofilm; colorimetry; polymers; proteins; sludge; sulfuric acid; uronic acids;     Show all 8 Subjects
Abstract:
... Biofilm structure and functionality depend on extracellular polymeric substances (EPS), but analytical methods for EPS often lack specificity which limits progress of biofilm research.EPS were extracted from aerobic granular sludge and analyzed with frequently applied colorimetric methods. The colorimetric methods were evaluated based on their applicability for EPS analysis. EPS fractions of inter ...
DOI:
10.1016/j.watres.2019.03.068

16. Chemical constituents from Euphorbia stracheyi Boiss

Author:
Liu, Tie; Liang, Qian; Zhang, Xin-Min; Su, Xiao-Min; Qin, Jian-Chun; Li, Gen-Qian; Xu, Wen-Hui
Source:
Biochemical systematics and ecology 2019 v.84 pp. 52-54
ISSN:
0305-1978
Subject:
phenols,   etc   ; Euphorbia; chemical composition; chemotaxonomy; coumarins; diterpenoids; monoterpenoids; spectral analysis;     Show all 8 Subjects
Abstract:
... The chemical investigation of whole plants Euphorbia stracheyi Boiss. led to the isolation of 14 compounds, including eight diterpenes (1–8), one monoterpene (9), three coumarins (10–12), and two phenols (13–14). Their structures were elucidated by extensive spectroscopic analyses and by comparison with the literature. Compounds 1–6, and 8–12 were firstly isolated from E. stracheyi, while compound ...
DOI:
10.1016/j.bse.2019.04.006

17. Core/shell structured CdS/polydopamine/TiO2 ternary hybrids as highly active visible-light photocatalysis

Author:
Wang, Minggui; Cui, Zhengxing; Yang, Mang; Lin, Longjie; Chen, Xichang; Wang, Min; Han, Jie
Source:
Journal of colloid and interface science 2019 v.544 pp. 1-7
ISSN:
0021-9797
Subject:
phenol,   etc   ; coatings; dopamine; hydrolysis; nanospheres; photocatalysis; titanium dioxide;     Show all 7 Subjects
Abstract:
... Core/shell structured CdS/polydopamine/TiO2 (CdS/PDA/TiO2) ternary hybrids were fabricated by sequentially coating of PDA and TiO2 on CdS nanospheres through dopamine self-polymerization and TBOT hydrolysis and hydrothermal processes. The reaction rate constants of CdS/PDA/TiO2 ternary hybrids toward the degradation of RhB, MB and phenol were more than 3 times higher than those of CdS/TiO2 hybrids ...
DOI:
10.1016/j.jcis.2019.02.080

18. Preparation of a chemiluminescence sensor for multi-detection of benzimidazoles in meat based on molecularly imprinted polymer

Author:
Cai, Yi; He, Xin; Cui, Peng Lei; Liu, Jing; Li, Zhao Bin; Jia, Bing Jie; Zhang, Teng; Wang, Jian Ping; Yuan, Wan Zhe
Source:
Food chemistry 2019 v.280 pp. 103-109
ISSN:
0308-8146
Subject:
phenols,   etc   ; beef; benzimidazoles; chemiluminescence; detection limit; haptens; mutton; polymers; screening;     Show all 9 Subjects
Abstract:
... In this study, a molecularly imprinted polymer capable of recognizing 8 benzimidazoles was first synthesized. The computation simulation showed that the shape and size of used template were the main factors influencing its recognition ability. Then the polymer was used as recognition reagent to prepare a chemiluminescence sensor on conventional 96-well microplate. The sample solution and a HRP-lab ...
DOI:
10.1016/j.foodchem.2018.12.052

19. A photochemical and theoretical study of the triplet reactivity of furano- and pyrano-1,4-naphthoquionones towards tyrosine and tryptophan derivatives

Author:
Teixeira, Rodolfo I.; Goulart, Juliana S.; Corrêa, Rodrigo J.; Garden, Simon J.; Ferreira, Sabrina B.; Netto-Ferreira, José Carlos; Ferreira, Vitor F.; Miro, Paula; Marin, M. Luisa; Miranda, Miguel A.; de Lucas, Nanci C.
Source:
RSC advances 2019 v.9 no.24 pp. 13386-13397
ISSN:
2046-2069
Subject:
phenol,   etc   ; electron transfer; esters; hydrogen; photolysis; quinones; tryptophan; tyrosine;     Show all 8 Subjects
Abstract:
... The photochemical reactivity of the triplet state of pyrano- and furano-1,4-naphthoquinone derivatives (1 and 2) has been examined employing nanosecond laser flash photolysis. The quinone triplets were efficiently quenched by l-tryptophan methyl ester hydrochloride, l-tyrosine methyl ester hydrochloride, N-acetyl-l-tryptophan methyl ester and N-acetyl-l-tyrosine methyl ester, substituted phenols a ...
DOI:
10.1039/c9ra01939a

20. A scalable electrochemical dehydrogenative cross-coupling of P(O)H compounds with RSH/ROH

Author:
Li, Yujun; Yang, Qi; Yang, Liquan; Lei, Ning; Zheng, Ke
Source:
Chemical communications 2019 v.55 no.34 pp. 4981-4984
ISSN:
1364-548X
Subject:
phenols,   etc   ; cross-coupling reactions; dehydrogenation; electrochemistry; free radicals; phosphorus; thiols;     Show all 7 Subjects
Abstract:
... A practical, scalable electrochemical dehydrogenative cross-coupling of P(O)H compounds with thiols, phenols and alcohols in both an undivided cell and a continuous-flow setup is disclosed. Its broad substrate scope (>50 examples), good functional-group tolerance and scalability (>10 g) show potential for practical synthesis. A preliminary mechanistic study suggests that the phosphorus radicals ar ...
DOI:
10.1039/c9cc01378d