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You searched for: Journal name RSC advances Remove constraint Journal name: RSC advances Subject dibenzofuran Remove constraint Subject: dibenzofuran
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1. Iron-catalyzed aryl-aryl cross coupling route for the synthesis of 1-(2-amino)-phenyl)dibenzo[b,d]furan-2-ol derivatives and their biological evaluation

Author:
Barreddi Chiranjeevi; Ganesh Koyyada; S. Prabusreenivasan; Vanaja Kumar; Pombala Sujitha; C. Ganesh Kumar; B. Sridhar; Saida Shaik; Malapaka Chandrasekharam
Source:
RSC advances 2013 v.3 no.37 pp. 16475-16485
ISSN:
2046-2069
Subject:
Mycobacterium tuberculosis; antibiotics; antineoplastic activity; biological assessment; catalytic activity; cell lines; cytotoxicity; dehydrogenation; dibenzofuran; iron; neoplasm cells; neoplasms
Abstract:
... Naturally occurring dibenzofuran motifs represent promising lead structures for the development of novel antimycobacterial agents. Prompted by our recent development of cross dehydrogenative coupling using iron catalysis, we extended our strategy to synthesize 14 novel anilinodibenzofuranols and they were explored for anti-tubercular and cytotoxic activities. Consistent with our hypothesis, DBF-3, ...
DOI:
10.1039/c3ra43345e

2. Usnic acid induces apoptosis via an ROS-dependent mitochondrial pathway in human breast cancer cells in vitro and in vivo

Author:
Shu-ting Zuo; Li-ping Wang; Yan Zhang; Dan-ning Zhao; Qiong-shu Li; Dan Shao; Xue-dong Fang
Source:
RSC advances 2014 v.5 no.1 pp. 153-162
ISSN:
2046-2069
Subject:
acetylcysteine; antineoplastic agents; apoptosis; breast neoplasms; caspases; cytochrome c; dibenzofuran; dose response; human cell lines; lichens; membrane potential; mice; mitochondria; mitochondrial membrane; mitogen-activated protein kinase; neoplasm cells; reactive oxygen species; toxicity; usnic acid; viability
Abstract:
... Usnic acid (UA), an active dibenzofuran derivative mainly found in lichens, is considered an antineoplastic agent based on its activity against tumor cells. However, the exact molecular mechanism through which UA mediates this activity has yet to be elucidated. Here, we have shown that UA selectively inhibited the viability of human breast cancer MCF-7 cells in a concentration- and time-dependent ...
DOI:
10.1039/c4ra12340a

3. AhR-mediated activities and compounds in sediments of Meiliang Bay, Taihu Lake, China determined by in vitro bioassay and instrumental analysis

Author:
Yan Xu; Si Wei; Qingdong Qin; Michael Hon-Wah Lam; John P. Giesy
Source:
RSC advances 2015 v.5 no.69 pp. 55746-55755
ISSN:
2046-2069
Subject:
adsorption; bioassays; cytotoxicity; dibenzofuran; ecosystems; fractionation; freshwater lakes; gene expression; polychlorinated biphenyls; polychlorinated dibenzofurans; polycyclic aromatic hydrocarbons; remediation; reporter genes; screening; sediments; tetrachlorodibenzo-p-dioxin; China
Abstract:
... To better understand the historical deterioration and the recent restoration of the ecosystem in Meiliang Bay, Taihu Lake, the third largest freshwater lake in China, extracts of nine surficial sediments were analyzed for their ability to induce dioxin-like activities in vitro. The sediment samples were tested as raw extracts (REs), acid-treated extracts (AEs) and fractionated extracts (FEs), resp ...
DOI:
10.1039/c5ra08412a

4. Deep blue organic light-emitting devices enabled by bipolar phenanthro[9,10-d]imidazole derivatives

Author:
Shuo Chen; Yukun Wu; Yi Zhao; Daining Fang
Source:
RSC advances 2015 v.5 no.88 pp. 72009-72018
ISSN:
2046-2069
Subject:
dibenzofuran; electric potential difference; electron transfer; fluorescence; imidazole; light emitting diodes; methylene chloride; moieties; thermal properties
Abstract:
... Two blue fluorescent phenanthroimidazole derivatives (PhImFD and PhImTD) with a D–π–A structure are synthesized by attaching a hole-transporting dibenzofuran or dibenzothiophene and an electron-transporting phenanthroimidazole moiety and characterized. The nonplanar twisted structures reduce molecular aggregation, which endows both of the compounds with good thermal properties, and film-forming ab ...
DOI:
10.1039/c5ra13814k

5. Double functionalization of 2-amino-2′-hydroxy-1,1′-biaryls: synthesis of 4-nitro-dibenzofurans and benzofuro-indoles

Author:
Amit Kumar; Moh. Sattar; Ajay Verma; Ankit Dara; Sangit Kumar
Source:
RSC advances 2015 v.5 no.56 pp. 44728-44741
ISSN:
2046-2069
Subject:
crystal structure; dibenzofuran; nitro compounds; phenol; sodium nitrite; synthesis
Abstract:
... Several substituted 2′-amino-biphenyl-2-ols were synthesized. The mild and TM-free double functionalization: nitration and cycloetherification of 2′-amino-biphenyl-2-ols have been achieved for the synthesis of functionalized 4-nitro-dibenzofurans utilizing NaNO₂ in TFA and water. Interestingly, nitration of phenol ring was observed along with the dibenzofuran ring formation in the one-pot synthesi ...
DOI:
10.1039/c5ra07328f

6. HCl and PCDD/Fs emission characteristics from incineration of source-classified combustible solid waste in fluidized bed

Author:
Yanji Li; Huihui Wang; Lu Jiang; Wei Zhang; Rundong Li; Yong Chi
Source:
RSC advances 2015 v.5 no.83 pp. 67866-67873
ISSN:
2046-2069
Subject:
calcium oxide; dibenzofuran; flue gas; fluidized beds; hydrochloric acid; municipal solid waste; plastics; pollutants; polychlorinated dibenzodioxins; polychlorinated dibenzofurans; refuse derived fuels; temperature; toxicity
Abstract:
... A fluidized bed incineration experiment was performed by means of refuse-derived fuel (RDF) from source-classified garbage to study the emission characteristics of hydrogen chloride (HCl) pollutants and polychlorinated dibenzo-p-dioxins and dibenzofurans (PCCD/Fs). This study analyzed the influence of the materials ratio, incineration temperature, and additive volume of calcium oxide (CaO) on the ...
DOI:
10.1039/c5ra08722h

7. Insights into the Morita–Baylis–Hillman reaction of isomeric dibenzofuran carbaldehydes: a theoretical and mass spectral study

Author:
Thirumal Yempala; Vijay Darshan Davalgar; Gaddamanugu Gayatri; Prabhakar Sripadi; Srinivas Kantevari
Source:
RSC advances 2015 v.5 no.120 pp. 99133-99142
ISSN:
2046-2069
Subject:
aldehydes; alkenes; catalysts; dibenzofuran; isomers; mass spectrometry; methanol; solvents; spectral analysis; zwitterions
Abstract:
... We herein report the faster Morita–Baylis–Hillman (MBH) reaction of dibenzofuran-4-carbaldehyde (2) than that of its isomer, dibenzofuran-2-carbaldehyde (1), with different activated olefins in the presence of DABCO as the base catalyst. We observed that there is no significant effect of the solvent (methanol) on the reaction rates. In situ mass spectrometry experiments and computational studies w ...
DOI:
10.1039/c5ra14486h

8. KOᵗBu mediated efficient approach for the synthesis of fused heterocycles via intramolecular O-/N-arylations

Author:
Raju Singha; Atiur Ahmed; Yasin Nuree; Munmun Ghosh; Jayanta K. Ray
Source:
RSC advances 2015 v.5 no.62 pp. 50174-50177
ISSN:
2046-2069
Subject:
carbazoles; dibenzofuran; potassium tert-butoxide
Abstract:
... A novel and efficient methodology for the synthesis of 6H-benzo[c]chromenes, 6H-benzo[c]chromen-6-ones, carbazoles, dibenzofurans, dibenzooxepins has been developed. The reaction goes through intramolecular O-/N-arylations with sp²C–Br bonds via typical SNAr pathway in presence of potassium-tert-butoxide base. ...
DOI:
10.1039/c5ra07532g

9. Mechanism and kinetic study on the ring-opening degradation of 2,3,7,8-tetrachlorinated dibenzofuran initiated by OH radicals in waste incineration

Author:
Kun Zhang; Shengmin Sun; Hui Zhang
Source:
RSC advances 2015 v.5 no.99 pp. 81153-81161
ISSN:
2046-2069
Subject:
chemical degradation; density functional theory; dibenzofuran; dioxins; free radicals; hydrogen; hydroxyl radicals; temperature; waste incineration
Abstract:
... The ring-opening degradation mechanism of 2,3,7,8-tetrachlorinated dibenzofuran (2,3,7,8-TCDF) initiated by OH radicals is investigated using density functional theory. On the basis of the bimolecular reactions of 2,3,7,8-TCDF with OH radicals, the main study is focused on the subsequent unimolecular reactions, including ring-opening, hydrogen transfer and other chemical transformations. There are ...
DOI:
10.1039/c5ra13804c

10. Novel aromatic polyimides derived from 2,8-di(3-aminophenyl)dibenzofuran. Synthesis, characterization and evaluation of properties

Author:
Alain Tundidor-Camba; Claudio A. Terraza; Luis H. Tagle; Deysma Coll; Pablo Ortiz; Javier de Abajo; Eva M. Maya
Source:
RSC advances 2015 v.5 no.87 pp. 71052-71059
ISSN:
2046-2069
Subject:
Gibbs free energy; anhydrides; carbon dioxide; contact angle; dibenzofuran; films (materials); glass transition temperature; hydrophobicity; methane; permeability; polymers; solubility; solvents; thermal degradation; thermal stability; viscosity
Abstract:
... Three aromatic polyimides (PIs) were prepared from a new aromatic diamine monomer derived from the rigid ring dibenzofuran. All PIs were obtained in high yield and the inherent viscosities were in the range of 0.60 and 0.74 dL g⁻¹. Polyimides derived from 4,4′-hexafluoroisopropyliden diphthalic anhydride (6FDA) and 4,4′-(dimethylsilanediyl) diphthalic anhydride (SiDA) showed excellent solubility i ...
DOI:
10.1039/c5ra14456f

11. Composition profiles, monthly changes and health risk of PCDD/F in fly ash discharged from a municipal solid waste incinerator (MSWI) in Northeast China

Author:
Jiafu Li; Han Dong; Jie Sun; Jinshun Tang; Jihua Nie; Shuyu Zhang; Zhihai Chen
Source:
RSC advances 2016 v.6 no.113 pp. 111966-111975
ISSN:
2046-2069
Subject:
Monte Carlo method; air; breathing; carcinogenicity; cleaning; dibenzofuran; face masks; fly ash; health effects assessments; incinerators; inhalation exposure; municipal solid waste; polluted soils; polychlorinated dibenzodioxins; polychlorinated dibenzofurans; China
Abstract:
... One of the hazardous wastes present in municipal solid waste incinerators (MSWI) is fly ash; it threatens the health of onsite workers due to its inevitable dispersion on the ground and in the atmosphere during the process of collecting, cleaning and transporting it from the incinerator. In the present study, composition profiles and monthly changes of polychlorinated dibenzo-p-dioxins and dibenzo ...
DOI:
10.1039/c6ra21462b

12. Novel mono-cationic fluorescent probes based on different central π-conjugated bridges for two-photon bioimaging of cellular nuclei

Author:
Shuheng Chi; Liang Li; Yiqun Wu
Source:
RSC advances 2016 v.6 no.74 pp. 69748-69757
ISSN:
2046-2069
Subject:
DNA; absorption; calves; dibenzofuran; dimethylformamide; fluorescence; fluorescent dyes; image analysis; irradiation; membrane permeability; photostability; pyridines; thymus gland
Abstract:
... A series of novel pyridine mono-cationic two-photon fluorescent probes based on different central π-conjugated bridges, fluorenone (W-pyI), dibenzothiophene (S-pyI), and dibenzofuran (F-pyI), were prepared and studied. Under one-photon excitation in a N,N-dimethylformamide solution, W-pyI, S-pyI, and F-pyI displayed fluorescence quantum yields of 0.401, 0.425, and 0.09, respectively. The two-photo ...
DOI:
10.1039/c6ra12193d

13. Promising Ni/Al-SBA-15 catalysts for hydrodeoxygenation of dibenzofuran into fuel grade hydrocarbons: synergetic effect of Ni and Al-SBA-15 support

Author:
Sharafadeen Gbadamasi; Tammar Hussein Ali; Lee Hwei Voon; Abdulazeez Yusuf Atta; Putla Sudarsanam; Suresh K. Bhargava; Sharifah Bee Abd Hamid
Source:
RSC advances 2016 v.6 no.31 pp. 25992-26002
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray diffraction; X-ray fluorescence spectroscopy; aluminum; benzene; catalysts; catalytic activity; chemical bonding; dibenzofuran; fuels; hydrogenation; nickel; scanning electron microscopy; silicon; synergism
Abstract:
... This work has been undertaken with the aim of designing promising noble-metal-free catalysts for efficient hydrodeoxygenation (HDO) of dibenzofuran (DBF) into fuel grade hydrocarbons. For this, various Ni/Al-SBA-15 catalysts with different Si/Al (50, 60, 70 and 80) mole ratios were synthesized and their catalytic performance was tested for HDO of DBF in a batch reactor. The catalysts were systemat ...
DOI:
10.1039/c5ra27526a

14. Quantum chemical design of carbazole- and pyridoindole-based ambipolar host materials for blue phosphorescent OLEDs

Author:
E. Varathan; Dolly Vijay; V. Subramanian
Source:
RSC advances 2016 v.6 no.78 pp. 74769-74784
ISSN:
2046-2069
Subject:
density functional theory; dibenzofuran; energy; hosts; moieties; phosphorescence; quantum mechanics
Abstract:
... Density functional theory has been employed to design thirty two host molecules for blue electrophosphorescence by incorporating dibenzofuran (DBF), dibenzothiophene (DBT), phenylcarbazole (Ph-Cbz), benzofuropyridine (DBF), benzothiopyridine (BTP) and phenyl pyridoindole (Ph-Cb1) subunits into N-phenyl carbazole (Ph-Cbz) and phenyl α-carboline (Ph-Cb1) core units. We have systematically investigat ...
DOI:
10.1039/c6ra15748c

15. Synthesis and electrophosphorescence of novel heteroleptic iridium complexes based on thiazole-containing ligands

Author:
Di Liu; Ruijuan Yao; Min Fu; Deli Li; Shufen Zhang
Source:
RSC advances 2016 v.6 no.41 pp. 34198-34203
ISSN:
2046-2069
Subject:
dibenzofuran; electrochemistry; iridium; ligands; light emitting diodes; naphthalene; phosphorescence
Abstract:
... Three novel heteroleptic cyclometalated iridium complexes, namely Ir-Cz, Ir-DBF and Ir-Np, were designed and synthesized for use as emitters in organic light-emitting diodes (OLEDs). 2-Phenyl-(aromatic-fused-thiazole) (the aromatic is carbazole, dibenzofuran or naphthalene) was designed as the major cyclometalating ligand framework to enlarge the ligand conjugate length and to study its influence ...
DOI:
10.1039/c6ra04551k

16. Usnic acid is a novel Pim-1 inhibitor with the abilities of inhibiting growth and inducing apoptosis in human myeloid leukemia cells

Author:
Yin-bo Fan; Min Huang; Yu Cao; Ping Gong; Wen-bing Liu; Shu-yu Jin; Jia-chen Wen; Yong-kui Jing; Dan Liu; Lin-xiang Zhao
Source:
RSC advances 2016 v.6 no.29 pp. 24091-24096
ISSN:
2046-2069
Subject:
apoptosis; cell lines; dibenzofuran; enzyme inhibition; enzymes; humans; lichens; mechanism of action; mice; myeloid leukemia; neoplasm cells; pro-apoptotic proteins; secondary metabolites; therapeutics; usnic acid
Abstract:
... Usnic acid (UA) is a secondary metabolite of lichens with a unique dibenzofuran scaffold. The growth inhibitory and apoptotic effects of UA as well as the potential mechanisms of action were determined in human acute myeloid leukemia HL-60 cells and chronic myeloid leukemia K562 cells. UA inhibits growth and induces apoptosis in both cell lines with HL-60 cells more responsive. The apoptotic effec ...
DOI:
10.1039/c6ra01159d

17. Combined mechanochemical and thermal treatment of PCBs contaminated soil

Author:
Zhonghua Zhao; Mingjiang Ni; Xiaodong Li; Alfons Buekens; Jianhua Yan
Source:
RSC advances 2017 v.7 no.34 pp. 21180-21186
ISSN:
2046-2069
Subject:
dechlorination; desorption; dibenzofuran; grinding; heat treatment; mechanochemistry; polluted soils; polychlorinated biphenyls; polychlorinated dibenzodioxins; polychlorinated dibenzofurans; silica; temperature
Abstract:
... This study combines a preliminary mechanochemical treatment and a subsequent thermal desorption for remediating soil, contaminated with polychlorinated biphenyls (PCBs). After 2 hours of grinding, assisted by addition of SiO₂, the total concentration of PCBs and their TEQ-value decreased by 81.9% and 85.4%, respectively. The effect of thermal treatment at 400, 500 and 600 °C on the removal efficie ...
DOI:
10.1039/c7ra01493g

18. Effect of conjugation and aromaticity of 3,6 di-substituted carbazoles on triplet energy and the implication of triplet energy in multiple-cyclic aromatic compounds

Author:
Kai Lin Woon; Azhar Ariffin; Kar Wei Ho; Show-An Chen
Source:
RSC advances 2018 v.8 no.18 pp. 9850-9857
ISSN:
2046-2069
Subject:
benzene; carbazoles; carbon; density functional theory; dibenzofuran; energy; fluorenes; furans; moieties; nitrogen; oxygen; phosphorus; pyrroles; silicon; sulfur; thiophene
Abstract:
... It is well-known that short conjugation is needed to obtain a high triplet energy. Carbazole has 3 fused rings and yet it has a high triplet energy. In order to illuminate the reason behind this, we synthesized a range of carbazole derivatives with substitution at the 3,6-positions. All carbazoles with phenyl moieties substituted at the 3,6-positions exhibit a lower triplet energy than that of car ...
DOI:
10.1039/c8ra00674a

19. Mechanism and thermal rate constants for complete series reactions of bromochlorophenols with H

Author:
Siyuan Zheng; Xianwei Zhao; Yunfeng Li; Fei Xu; Qingzhu Zhang
Source:
RSC advances 2018 v.8 no.8 pp. 4259-4272
ISSN:
2046-2069
Subject:
bromine; chemical bonding; chlorine; chlorophenols; dibenzofuran; free radicals; quantum mechanics; temperature
Abstract:
... Bromochlorophenoxy radicals (BCPRs) are the principal precursors for the formation of mixed polybrominated and chlorinated dibenzo-p-dioxins and dibenzofurans (PBCDD/Fs). In this study, the formation of BCPRs from a complete series of reactions of 96 bromochlorophenol (BCP) congeners with H atoms was analyzed using quantum chemical methods at the MPWB1K/6-311+G(3df,2p)//MPWB1K/6-31+G(d,p) level. T ...
DOI:
10.1039/c7ra12781b

20. Thermal reaction characteristics of dioxins on cement kiln dust

Author:
Ming-Xiu Zhan; Shuping Pan; Ivan Deviatkin; Tong Chen; Xiao-Dong Li
Source:
RSC advances 2018 v.8 no.7 pp. 3582-3591
ISSN:
2046-2069
Subject:
cement; dibenzofuran; dust; flue gas; hazardous waste; oxygen; polychlorinated dibenzodioxins; polychlorinated dibenzofurans; refuse derived fuels; temperature
Abstract:
... Cement kiln dust is commonly recycled back into the production process. This results in elevated concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the flue gases of cement plants. The present study investigated the effects the reaction temperature, oxygen content, and origin of kiln dust had on the thermal reaction characteristics of PCDD/Fs. The concentration of 2 ...
DOI:
10.1039/c7ra09220b

21. UHPLC-Q-TOF-MS/MS-oriented characteristic components dataset and multivariate statistical techniques for the holistic quality control of Usnea

Author:
Yiran Jin; Yinghua Ma; Weiwei Xie; Ludan Hou; Huijun Xu; Kerong Zhang; Lantong Zhang; Yingfeng Du
Source:
RSC advances 2018 v.8 no.28 pp. 15487-15500
ISSN:
2046-2069
Subject:
Oriental traditional medicine; Usnea; chemometrics; data collection; dibenzofuran; herbs; ion exchange chromatography; liquids; principal component analysis; quality control; tandem mass spectrometry
Abstract:
... The holistic quality evaluation of Traditional Chinese Medicine (TCM) is confronted with significant challenges due to its extreme chemical complexity. In this study, a sensitive strategy based on ultra-high-performance liquid chromatography-triple/time-of-flight mass spectrometry (UHPLC-Q-TOF-MS/MS) and chemometric analysis was established and validated for the qualitative and semi-quantitative a ...
DOI:
10.1039/c8ra00081f

22. Alumina-promoted oxodefluorination

Author:
Akhmetov Vladimir; Feofanov Mikhail; Konstantin Amsharov
Source:
RSC advances 2020 v.10 no.18 pp. 10879-10882
ISSN:
2046-2069
Subject:
aluminum oxide; chemical bonding; chemical reactions; dibenzofuran; fluorine; furans; oxygen
Abstract:
... A simple protocol for the clean preparation of heterocyclic compounds containing dibenzofuran's core via oxodefluorination of fluoroarenes on activated γ-Al₂O₃ is reported. Alumina can be considered as a reliable oxygen source enabling one-pot substitution of fluorine atoms and yielding benzoannulated furan derivatives. The corresponding C–F bond activation is selective towards less stable C–Br/C– ...
DOI:
10.1039/d0ra01369b