Results 151 to 160 of about 23,681 (206)

Construction of Phenanthrenes and Chrysenes from β-Bromovinylarenes via Aryne Diels-Alder Reaction/Aromatization.

Journal of Organic Chemistry, 2019
A highly efficient transition metal-free general method for the synthesis of polycyclic aromatic hydrocarbons (PAHs) like phenanthrenes and chrysenes (and tetraphene) from β-bromovinylarenes and arynes has been developed.
Vikram Singh, Ram Subhawan Verma, A. Khatana, B. Tiwari   +3 more
semanticscholar   +1 more source

Phenanthrenes from Dendrobium plicatile

Phytochemistry, 2000
From Dendrobium plicatile stems, three phenanthrenes were isolated. The structures are 2,5-dihydroxy-4,9,10-trimethoxyphenanthrene, 2,5-dihydroxy-4-methoxyphenanthrene and 2,5,9-trihydroxy-4-methoxy-9,10-dihydrophenanthrene.
C, Honda, M, Yamaki
openaire   +2 more sources

New syntheses of 1,4-dimethyl-phenanthrene and 9-methyl-phenanthrene

Experientia, 1951
Allylazeton reagiert unter den Bedingungen einer milden Friedel-Craftschen Reaktion mit Naphthalin, wobei der Naphthylrest vorzugsweise an die wasserstoffarmere Seite der Allyl-Doppelbindung tritt. Analog reagiert Allyl-cyclohexanon mit Benzol. Die Produkte (I) bzw.
N K, BHATTACHARYYA, S M, MUKHERJI
openaire   +2 more sources

Three new phenanthrenes with antimicrobial activities from the aerial parts of Juncus effusus.

Fitoterapia, 2018
Three new phenanthrenes (1-3), designated as 2-methoxy-1,6-dimethyl-5-vinyl-9, 10-dihydrophenanthren-7-ol, 1,6-dimethyl-4,5-dihydropyrene-2,7-diol and 1-(3,7- dihydroxy-2,8-dimethyl-9,10-dihydrophenanthren-1-yl)ethanone, were isolated from the aerial ...
Wei Zhao, Lulin Xu, Xia Zhang, Xiao-Wei Gong, Donglai Zhu, Xiao-Hua Xu, Fei Wang, Xiao-Long Yang   +7 more
semanticscholar   +1 more source

Interactions among buffelgrass, phenanthrene and phenanthrene-degrading bacteria in gnotobiotic microcosms

Journal of Environmental Science and Health, Part A, 2008
An experiment was undertaken in gnotobiotic microcosms to determine the role of buffelgrass (Cenchrus ciliaris) and a phenanthrene-degrading bacterium (strain PM600) in the degradation of phenanthrene. The Gram-negative bacterium was identified as a Sphingomonas sp. by 16S rRNA gene sequence analysis and as S.
Francoise M, Robert, Wenhao H, Sun, Marisa, Toma, Ryan K, Jones, Chung-Shih, Tang   +4 more
openaire   +2 more sources

Phenanthrenes from Juncus atratus with antiproliferative activity

Tetrahedron, 2019
The present study has focused on the isolation and structure determination of phenanthrenes from Juncus atratus Krock. Nine compounds, among them five phenanthrenes, have been isolated from the methanol extract of the plant.
D. Stefkó, N. Kúsz, A. Csorba, G. Jakab, Péter Bérdi, I. Zupkó, J. Hohmann, A. Vasas   +7 more
semanticscholar   +1 more source

Enhanced desorption of humin-bound phenanthrene by attached phenanthrene-degrading bacteria

Bioresource Technology, 2012
The objective of the study was to test the hypothesis that the attachment of polycyclic aromatic hydrocarbons (PAHs)-degrading bacteria can promote desorption of PAHs from humin, thereby increasing their bioavailability. Biodegradation of humin-bound phenanthrene (PHE) - a model compound for PAHs - was investigated using two PHE-degrading bacteria ...
Yinping, Zhang, Fang, Wang, Yongrong, Bian, Fredrick Orori, Kengara, Chenggang, Gu, Qiguo, Zhao, Xin, Jiang   +6 more
openaire   +2 more sources

Magnetic halloysite nanotube/polyaniline/copper composite coupled with gas chromatography-mass spectrometry: A rapid approach for determination of nitro-phenanthrenes in water and soil samples.

Journal of Chromatography A, 2018
A fast, sensitive and reliable ultrasound-assisted magnetic dispersive solid-phase microextraction (UAMDSPME) setup was developed and evaluated for the enrichment of nitro- phenanthrenes compound in environmental samples prior to GC-MS determination.
M. Darvishnejad, H. Ebrahimzadeh
semanticscholar   +1 more source

Poly p-hydroxybenzyl substituted bibenzyls and phenanthrenes from Bletilla ochracea Schltr with anti-inflammatory and cytotoxic activity.

Fitoterapia, 2018
Ten previously undescribed stilbenoids, including six bibenzyls (bleochrins A-F, 1-6), three phenanthrenes derivatives (bleochrins G-J, 7-10) along with eleven known compounds were isolated from the rhizomes of Bletilla ochracea Schltr.
Jin-Yu Li, Liu Yang, Bo Hou, Fu-Cai Ren, Xiao-Bei Yang, Yong-Feng Lv, Meng-ting Kuang, Jiang-miao Hu, Jun Zhou   +8 more
semanticscholar   +1 more source

Kondensationsprodukte aus Phenanthren

Justus Liebigs Annalen der Chemie, 1967
AbstractDurch Kondensation von Phenanthren in Gegenwart von Aluminiumchlorid in Tetrachloräthan konnte bei Einleiten von Luft außer dem bekannten Dibenzo[b,k]perylen (1) auch das noch unbekannte Tribenzo[c,j,l]fluoranthen (2) gewonnen werden. Es werden einige Reduktionsprodukte der beiden Kohlenwasserstoffe beschrieben.
Heinz‐Gerhard Franck, Herbert Buffleb
openaire   +1 more source