Results 111 to 120 of about 3,271,959 (246)

Palladium catalytic system for inhibition of O-arylation type reaction and regioselective direct arylation at C2 of phenols

, 2011
International audienceThe palladium-catalysed arylation of free OH phenol derivatives proceeds regioselectively either at C2 or at OH with a variety of electron-deficient aryl bromides or heteroaryl bromides.
Doucet, Henri, Kassem Beydoun, Beydoun, Kassem, Henri Doucet   +3 more
core   +1 more source

Carbon‐Supported Catalytic Systems Assembled by π–π Interactions

European Journal of Organic Chemistry, EarlyView.
This review explores the noncovalent immobilization of organic and organometallic catalysts on carbonaceous supports through π–π interactions, highlighting its potential to enhance catalyst recovery, recyclability, and the sustainability of organic synthesis.
Chloé Jamalkhan, Léa Ibos, Sarah Bouery, Veronika Myronova, Anaïs Scuiller, Mohamed Mellah, David Kreher, Emmanuelle Schulz, Olivier R. P. David   +8 more
wiley   +1 more source

Palladium‐Catalyzed Heck‐Type Double Arylation of 1,2‐Dihydropyridines

Helvetica Chimica Acta, EarlyView.
A Pd‐catalyzed Heck‐type double arylation of 1,2‐dihydropyridines enables concise access to 2‐substituted 3,6‐diarylated scaffolds with high site‐ and regioselectivity. ABSTRACT We report a site‐ and regioselective Heck‐type double arylation of substituted 1,2‐dihydropyridines.
Haining Li, Zackaria Nairoukh
wiley   +1 more source

Diversity-Oriented Two-Step Annulative π-Extension Enables Access to Structurally Complex Nanographenes. [PDF]

Angew Chem Int Ed Engl
Pd‐catalyzed C–H arylation of polycyclic aromatic hydrocarbons (PAHs) with various aryltrimethylsilanes enables the preparation of structurally complicated arylated PAHs, which can be further transformed to nanographenes in a manner of two‐step annulative π‐extension (APEX) reaction.
Katsuragawa H, Toyama Y, Mikawa S, Kawahara KP, Ito H, Itami K.   +5 more
europepmc   +3 more sources

Regioselective Pd-catalyzed direct C1- and C2-arylations of lilolidine for the access to 5,6-dihydropyrrolo[3,2,1-ij]quinoline derivatives

Beilstein Journal of Organic Chemistry, 2019
The Pd-catalyzed C–H bond functionalization of lilolidine was investigated. The use of a palladium-diphosphine catalyst associated to acetate bases in DMA was found to promote the regioselective arylation at α-position of the nitrogen atom of lilolidine ...
Hai-Yun Huang, Haoran Li, Thierry Roisnel, Jean-François Soulé, Henri Doucet   +4 more
doaj   +1 more source

Ester as Blocking Group for Palladium-Catalysed Direct Forced Arylation at Disfavourable Site of Heteroaromatics

, 2012
International audienceThe use of esters as blocking groups at the C2 position on a range of 3-substituted 5-membered ring heteroaromatics such as thiophenes or furans, allows control of the regioselectivity for the palladium-catalysed direct arylation at
Doucet, Henri, Dixneuf, Pierre H., Chen, Lu, Bruneau, Christian   +3 more
core   +1 more source

Advances in conjugated porous polymers via high internal phase emulsion templating

Polymer International, EarlyView.
This mini‐review highlights the design, synthesis and potential applications of π‐conjugated polyHIPEs, emphasizing their unique hierarchical structure and tunable properties. The work outlines innovative synthetic strategies and explores their promising roles in photocatalysis and environmental remediation, paving the way for future advancements in ...
Julie‐Lisa Malaval, Michel Granier, Philippe Gerbier, Sébastien Richeter, Sébastien Clément   +4 more
wiley   +1 more source

Palladium single-atom/cluster cocatalyst supported on non-enzymatic browning glucose breaks the activity-selectivity trade-off in C(sp3)-H arylation

Communications Chemistry
Using Pd homogeneous catalysts for direct C–H arylation is an attractive approach for synthesizing natural products and organic functional materials, but limitations in terms of cost and catalyst recovery could be alleviated by alternative heterogeneous ...
Xiaojie He, Wunengerile Zhang, Chaolumen Bai, Dan Liu, Agula Bao, Tegshi Muschin, Yong-Sheng Bao   +6 more
doaj   +1 more source

Machine learning‐driven advances in carbon‐based quantum dots: Opportunities accompanied by challenges

Responsive Materials, EarlyView.
Machine learning provides a unifying framework to connect structure, fluorescence properties, and applications of carbon‐based quantum dots. This review highlights how data‐driven strategies enable fluorescence regulation, reveal underlying mechanisms, and accelerate the rational design of functional carbon dots.
Liangfeng Chen, Siwei Yang, Xiangqian Cui, Ziheng Liu, Hang Wang, Yongqiang Li, Peng He, Miao Wang, Guqiao Ding   +8 more
wiley   +1 more source

Electrochemical Reductive β‐Arylation and Alkenylation of α‐Branched Acroleins by Primary Amine/Nickel Dual Catalysis

Transformative Chemistry, EarlyView.
A synergistic primary amine/nickel catalysis under electrochemical conditions was developed for cathodic β‐arylation and alkenylation of α‐branched acroleins. The reaction proceeds through β‐enaminyl radicals generated by cathodic reduction of an iminium ion allowing smooth coupling with aryl‐ or alkenyl‐Ni(II) species.
Yingdong Duan, Fanzhu Zeng, Qifeng Lin, Sanzhong Luo   +3 more
wiley   +1 more source