Results 21 to 30 of about 82,293 (280)
Energy Geoscience, 2023 The influence of origin, depositional environment and thermal maturity of organic matter on the occurrence of aromatic hydrocarbons in source rocks from the central and northwestern Niger Delta was investigated.
Akinsehinwa Akinlua +3 more
doaj +1 more source
Ecotoxicology and Environmental Safety, 2022 In aquatic systems, sediment is both a sink for persistent organic pollutants (POPs) and a potential source of POPs release. Consequently, it is important to understand the pollution characteristics and sources of polychlorinated naphthalenes (PCNs) as ...
Yanjun Du +4 more
doaj +1 more source
Electrode material promoted dehydrogenative homo-/cross-coupling of weakly activated naphthalenes
Green Synthesis and Catalysis, 2023 Herein, we reported an electrochemical dehydrogenative homo-/cross-coupling of weakly activated naphthalene in the exogenous transition metal- and oxidants-free manner.
Siyuan Liu +7 more
doaj +1 more source
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
doaj +1 more source
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
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
doaj +1 more source
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
doaj +1 more source
Natural Products and Bioprospecting, 2023 The emergence and spread of drug-recalcitrant Plasmodium falciparum parasites threaten to reverse the gains made in the fight against malaria. Urgent measures need to be taken to curb this impending challenge.
Phanankosi Moyo +7 more
doaj +1 more source
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
doaj +1 more source