Results 21 to 30 of about 3,823 (239)
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
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
fluorenes, and Indenes Triggered by Simple Lewis Acid
, 2022 This report illustrates BF3·OEt2 promoted intramolecular cascade cycloaromatization of 1,7-ynones toward synthesizing structurally diverse benzofluorene scaffolds.
Dakoju Ravi Kishore +7 more
core +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
Nature Communications, 2020 The formation of chiral molecules generally relies on direct chirality transfer from catalyst to products. Here, the authors report a strategy based on point chirality transfer from the catalyst to a dirhodium carbene intermediate with axial chirality ...
Kuiyong Dong +8 more
doaj +1 more source
Synthesis of Fluorenes and Dibenzo[g,p]chrysenes through an Oxidative Cascade
, 2022 We have developed robust, operationally simple syntheses of fluorenes and of dibenzo[g,p]chrysenes through oxidative cascade processes. These structures that are commonly encountered in optoelectronic materials, dyes, and pharmaceutical products are ...
Marcus A. Tius +5 more
core +1 more source
Beilstein Journal of Organic Chemistry, 2011 5-(2-Methoxy-1-naphthyl)- and 5-[2-(methoxymethyl)-1-naphthyl]-11H-benzo[b]fluorene were synthesized by treatment of the corresponding benzannulated enediynes with potassium tert-butoxide in refluxing toluene to give benzannulated enyne–allenes for the ...
Yu-Hsuan Wang +3 more
doaj +1 more source