Results 251 to 260 of about 25,797 (319)
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Synthesis of Fluorenes and Dibenzo[g,p]chrysenes through an Oxidative Cascade.
Journal of Organic Chemistry, 2022We 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 ...
C. F. Dickinson +2 more
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Lewis Acid Mediated Domino Intramolecular Cyclization: Synthesis of Dihydrobenzo[a]fluorenes.
Journal of Organic Chemistry, 2021An efficient and facile method for the regioselective synthesis of novel dihydrobenzo[a]fluorenes from readily accessible alkynols is presented. The current strategy triggers the formation of a dual C-C bond intramolecularly via Lewis acid catalysis ...
D. Kishore, C. Shekhar, G. Satyanarayana
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Bis-(Fluorene)-Embedded Hexaphyrins
The Journal of Organic Chemistry, 2022The polyaromatic hydrocarbon containing expanded porphyrins, bis-(fluorene)-embedded hexaphyrins, were synthesized by condensing fluorene-based tripyrrane with pentafluorobenzaldehyde in CH2Cl2 in the presence of 1 equiv of BF3·OEt2 under an inert atmosphere followed by oxidation with DDQ in open air at room temperature. The reaction worked only when 1
Bharti Yadav, Mangalampalli Ravikanth
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Organic Letters, 2020
A cascade alkene sulfonylation that simultaneously forges C-S and C-C bonds is a highly efficient and powerful approach for directly accessing structurally diverse sulfonylated compounds in a single operation.
Santosh K Pagire +2 more
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A cascade alkene sulfonylation that simultaneously forges C-S and C-C bonds is a highly efficient and powerful approach for directly accessing structurally diverse sulfonylated compounds in a single operation.
Santosh K Pagire +2 more
semanticscholar +1 more source
Journal of Organic Chemistry, 2020
Herein, a facile diversity-oriented approach to access functionalized benzo[a]fluorenes, benzo[b]fluorenones, and naphthyl ketones has been demonstrated via site-selective intramolecular cyclization of aryl-fused 1,6-diyn-3-ones.
Mou Mandal, S. Sakthivel, R. Balamurugan
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Herein, a facile diversity-oriented approach to access functionalized benzo[a]fluorenes, benzo[b]fluorenones, and naphthyl ketones has been demonstrated via site-selective intramolecular cyclization of aryl-fused 1,6-diyn-3-ones.
Mou Mandal, S. Sakthivel, R. Balamurugan
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Photosynthese des Fluorens, des Reten‐fluorens und des 1.2‐Benzo‐fluorens
Justus Liebigs Annalen der Chemie, 1958AbstractDie Darstellung einiger o‐Chinondiazide mit dem Ringsystem des Phenanthrens und Chrysens und deren Lichtreaktion werden beschrieben.
Oskar Süs +2 more
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De Novo Protocol for the Construction of Benzo[a]fluorenes via Nitrile/Alkene Activation.
Organic Letters, 2020Unprecedented chemo- and regioselective synthesis of benzo[a]fluorenes and naphthamide-substituted benzo[a]fluorenes were constructed from the reaction of (E)-2-aroyl-3-(2-(arylalkynes/alkenes)aryl)acrylonitrile scaffolds under metal-free conditions via ...
B. Gore +4 more
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Noninnocent Azo-Aromatic Cobalt(II)-Catalyzed sp3 C-H Alkylation of Fluorenes with Alcohols.
Journal of Organic ChemistryHerein, employing well-defined redox noninnocent cobalt(II) complexes an efficient sp3 C-H alkylation of fluorenes using alcohols as alkylating agents to result in alkylated fluorenes is reported.
Kamal, S. Samanta
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Fungal degradation of fluorene
Chemosphere, 2000A selection of 30 strains of micromycetes known as good degraders of polychlorinated aromatic compounds, mostly isolated from soil and belonging to various taxonomic groups, have been investigated to degrade fluorene. Toxicity assays, first evaluated on solid media, have shown high growth inhibition at concentrations above 0.001 g l-1 only towards 23 ...
D, Garon, S, Krivobok, F, Seigle-Murandi
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Journal of Organic Chemistry
A novel conversion of 1,5-diynols into sulfonylated benzo[b]fluorenes is reported by a TFA-promoted cascade cyclization with sodium sulfinates under mild conditions.
Shimin Jiang +9 more
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A novel conversion of 1,5-diynols into sulfonylated benzo[b]fluorenes is reported by a TFA-promoted cascade cyclization with sodium sulfinates under mild conditions.
Shimin Jiang +9 more
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