Results 11 to 20 of about 19,687 (245)
Dispiro[fluorene-9,5′-[1,2,3,4]tetrathiane-6′,9′′-fluorene] [PDF]
Acta Crystallographica Section C Crystal Structure Communications, 2001 The tetrathiane ring of the title compound, C26H16S4, has a chair conformation and the molecule has approximate C2 symmetry. Each of the two fluorene ring systems is virtually planar, with the ring planes intersecting at an angle of 67.58 (5)°. This novel compound has been formed as a side product from the treatment of 9H-fluorene-9-thione with methyl ...
Linden, Anthony +2 more
openaire +4 more sources
Clickable azide-functionalized bromoarylaldehydes – synthesis and photophysical characterization
Beilstein Journal of Organic Chemistry, 2020 Herein, we present a facile synthesis of three azide-functionalized fluorophores and their covalent attachment as triazoles in Huisgen-type cycloadditions with model alkynes.
Dominik Göbel +3 more
doaj +1 more source
Organic Materials, 2023 Unsymmetrically disubstituted antiaromatic indenofluorene (IF), in comparison to aromatic pentacene counterpart with unsymmetrical disubstitution, was rare in the literature until our recent report on indeno[1,2-b]fluorene and indeno[2,1-a]fluorene ...
Himanshu Sharma +4 more
doaj +1 more source
Assessment and Characterization of Alkylated PAHs in Selected Sites across Canada
Atmosphere, 2022 Alkylated polycyclic aromatic hydrocarbons (alkyl-PAHs), dibenzothiophenes (DBTs), and unsubstituted polycyclic aromatic hydrocarbons (PAHs) are naturally present in fossil fuels.
Andrzej Wnorowski +5 more
doaj +1 more source
(Sila)Difluoromethylation of Fluorenyllithium with CF3H and CF3TMS
SynOpen, 2018 Difluoromethylation of the C9-H site of the fluorene ring using lithium base and fluoroform (CF3H), which is one of the most cost-effective difluoromethylating reagents, is attained to give difluoromethylated fluorenes with an all-carbon quaternary ...
Kenichi Maruyama +2 more
doaj +1 more source
Revue Marocaine des Sciences Agronomiques et Vétérinaires, 2023 Le lac Nokoué (Sud Bénin) est la pêcherie continentale la plus productive de l’Afrique de l’Ouest avec une très forte biodiversité, mais qui malheureusement il perd progressivement ses ressources à cause de sa pollution.
Prudencio AGBOHESSI +3 more
doaj +1 more source
Cyanomethylation of Substituted Fluorenes and Oxindoles with Alkyl Nitriles
Organic Letters, 2020 The first example of metal-free cyanomethylenation from alkyl nitriles of sp3 C-H bonds to afford quaternary carbon centers is described. This oxidative protocol is operationally simple and features good functional group compatibility.
Gang Hong +2 more
semanticscholar +1 more source
Palladium-Catalysed Coupling and Acid-Mediated Cyclisation: Synthesis of Fluorenones and Fluorenes
SynOpen, 2018 Palladium-catalysed sequential one-pot synthesis of fluorenones is described. The reaction comprises intermolecular Suzuki coupling and intramolecular acid-mediated cyclisation in a one-pot procedure.
Devarapalli Ravi Kumar +2 more
doaj +1 more source
The influence of spin-labeled fluorene compounds on the assembly and toxicity of the aβ peptide. [PDF]
PLoS ONE, 2012 The deposition and oligomerization of amyloid β (Aβ) peptide plays a key role in the pathogenesis of Alzheimer's disease (AD). Aβ peptide arises from cleavage of the membrane-associated domain of the amyloid precursor protein (APP) by β and γ secretases.
Jitka Petrlova +11 more
doaj +1 more source
A facile synthesis of novel indole derivatives as potential antitubercular agents
Journal of Taibah University for Science, 2017 A novel series of 5,5-dimethyl-11-phenyl-4b,5,5a,10,10a,11,11a,12-octahydro-10,11,12-triaza-indeno[2,1-b]fluorenes 3aâ3l were prepared by reacting oxindole, aryl amines and acetone using dibutylamine as an organocatalyst via simultaneous Knoevenagel ...
Gulzar A. Khan +5 more
doaj +1 more source