Results 21 to 30 of about 6,045 (246)
Synthesis and Characterisation of Eight Isomeric Bis(2-pyridyloxy)naphthalenes
Molecules, 2006 Eight isomeric bis(2-pyridyloxy)naphthalenes have been prepared from reactions of 2-bromopyridine with the appropriate dihydroxynaphthalene and the products fully characterised by 1- and 2-D NMR spectroscopy.
Peter J. Steel +1 more
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Distributions of Polychlorinated Naphthalenes in Sediments of the Yangtze River, China
Molecules, 2021 The pollution status of polychlorinated naphthalenes (PCNs) in the sediment of the Yangtze River Basin, Asia’s largest river basin, was estimated. The total concentrations of PCNs (mono- to octa-CNs) ranged from 0.103 to 1.631 ng/g.
Zhitong Liu +5 more
doaj +1 more source
The German Senate Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area (MAK Commission) has summarized and re-evaluated the data for naphthalene [91-20-3] considering all toxicological end points. Relevant studies were identified from a literature search. The critical effects are the carcinogenic effects in rodents.
Hartwig, A, Arand, M, MAK Commission
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Towards a Synthesis of Naphthalene Derived Natural Products
Molecules, 2005 Dieckmann-type cyclization reactions have been employed in the synthesis of the alkyl substituted naphthoquinone 11 and the naphthalenes 10 and 12.
R. Barrow, M. McCulloch
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Isolation and Ionization of 1,1-Dihalogeno-1H-cyclopropa[a]-naphthalene
CHIMIA, 1985 1,1-Difluoro- and 1,1-dichloro-1H-cyclopropa[a]naphthalenes (1a and 1b) are prepared via dehydrohalogenation of the appropriate brominated carbene adducts (2a and 2b, respectively) of 4-bromo-1,2-dihydronaphthalene.
Paul Müller, Huong Can Nguyen Thi
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Selenium-Mediated Synthesis of Tetrasubstituted Naphthalenes through Rearrangement
Molecules, 2015 New β-keto ester substituted stilbene derivatives have been synthesized and cyclized with selenium electrophiles in the presence of Lewis acids. This now allows access to 1,2,3,4-tetrasubstituted naphthalene derivatives as cyclization and rearrangement ...
James Tancock, Thomas Wirth
doaj +1 more source
Gold(I)-Catalyzed Aromatization: Expeditious Synthesis of Polyfunctionalized Naphthalenes
iScience, 2019 Summary: A gold-catalyzed 6-endo-dig carbocyclization of alkyne with the pendent diazo group is reported. It provides an expeditious approach for the synthesis of multi-functionalized naphthalene derivatives under mild conditions.
Cheng Zhang +7 more
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New Naphthalene Derivatives from the Mangrove Endophytic Fungus Daldinia eschscholzii MCZ-18
Marine DrugsFive new naphthalene derivatives dalesconosides A–D, F (1–4, 6), a known synthetic analogue named dalesconoside E (5), and eighteen known compounds (7–24) were isolated from Daldinia eschscholzii MCZ-18, which is an endophytic fungus obtained from the ...
Zhiyong Xu +6 more
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Polarizable Vanadium Dipoles Promote Water Dissociation on Vanadium‐Based Metal Organic Framework
Advanced Functional Materials, EarlyView.The polarization of unpaired V 3d electrons weakens the H─O bond to improve water dissociation by the dual Vδ+:O─H and Pλ−:H─O coupling hydrogen bonds formation and relaxation. P@V‐MOF electrocatalyst shows low overpotentials (94 mV in acid, 178 mV in neutral, and 77 mV in alkaline solutions) with excellent stability for effective overall water ...
Xinjuan Liu +13 more
wiley +1 more source
Zhongguo shipin weisheng zazhiObjectiveTo establish a method for the determination of polychlorinated naphthalenes in bivalve molluscs by gas chromatography-triple quadrupole mass spectrometry （GC-MS/MS）.MethodsThe samples were dehydrated with anhydrous Na2SO4， extracted by ...
LI Zeran +3 more
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