Results 161 to 170 of about 19,687 (245)

Palladium-Catalyzed Cycloisomerization of 2-Ethynylbiaryls to 9-Methylidene Fluorenes.

Organic Letters, 2022
A palladium-catalyzed cycloisomerization of 2-ethynylbiaryls to 9-methylidene fluorenes is described for the first time. The cycloisomerization of 2-ethynylbiaryls proceeded smoothly in the presence of weak acid at low temperature to afford 9-methylidene
Hongyu Guo, Sheng Zhang, Xiujuan Feng, Xiaoqiang Yu, Yoshinori Yamamoto, M. Bao   +5 more
semanticscholar   +1 more source

Synthesis of Fluorenes with an All‐Carbon Quaternary Center via Palladium‐Catalyzed Dual Arylation using Cyclic Diaryliodonium Triflates

Advanced Synthesis and Catalysis, 2017
Daqian Zhu, Shijun Wen, A Ganesan
exaly   +2 more sources

Lewis Acid Mediated Domino Intramolecular Cyclization: Synthesis of Dihydrobenzo[a]fluorenes.

Journal of Organic Chemistry, 2021
An 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
semanticscholar   +1 more source

Synthesis and Application of Tetrahydro‐2H‐fluorenes by a Pd(0)‐Catalyzed Benzylic C(sp3)−H Functionalization

Chemistry - A European Journal, 2016
Chihiro Tsukano
exaly   +2 more sources

Recent Progress towards Transition‐Metal‐Catalyzed Synthesis of Fluorenes

Chemistry - A European Journal, 2015
Chunyin Zhu, Long-Wu Ye
exaly   +2 more sources

The Different Faces of [Ru(bpy)3Cl2] and fac[Ir(ppy)3] Photocatalysts: Redox Potential Controlled Synthesis of Sulfonylated Fluorenes and Pyrroloindoles from Unactivated Olefins and Sulfonyl Chlorides.

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, N. Kumagai, M. Shibasaki   +2 more
semanticscholar   +1 more source

Brønsted/Lewis Acid-Promoted Site-Selective Intramolecular Cycloisomerizations of Aryl-Fused 1,6-Diyn-3-ones for Diversity-Oriented Synthesis of Benzo-Fused Fluorenes and Fluorenones and Naphthyl Ketones.

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
semanticscholar   +1 more source

De Novo Protocol for the Construction of Benzo[a]fluorenes via Nitrile/Alkene Activation.

Organic Letters, 2020
Unprecedented 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, Chun-Hsien Chiang, C. Lee, Yi-Lun Shih, Jeh‐Jeng Wang   +4 more
semanticscholar   +1 more source

Fungal degradation of fluorene

Chemosphere, 2000
A 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
openaire   +2 more sources

Straightforward Synthesis and Properties of Highly Fluorescent [5]- and [7]-Helical Dispiroindeno[2,1-c]fluorenes.

Angewandte Chemie, 2019
This work presents a general approach for synthesis of substituted [5]-helical dispiroindeno[2,1-c]fluorenes based on Rh-catalyzed intramolecular cyclotrimerization of triynes.
R. Kaiser, D. Nečas, Timothée Cadart, R. Gyepes, I. Císařová, J. Mosinger, L. Pospíšil, M. Kotora   +7 more
semanticscholar   +1 more source