نتایج جستجو برای: heck cross coupling

تعداد نتایج: 633215  

Journal: :Chinese Journal of Catalysis 2022

Plasmonic metal nanoparticles have emerged as important candidates for photocatalysis. Numerous studies shown that coupling of a plasmonic component (such Au) the light energy harvester with catalytically active Pd) to form hybrid or alloy structures could achieve enhanced catalytic performance. However, microscopic mechanism relative multicomponent photocatalysis is still elusive. Here, we fin...

Journal: :Applied sciences 2021

Palladium-based carbon catalysts (Pd/C) can be potentially applied as an efficient catalyst for Suzuki–Miyaura and Mizoroki–Heck coupling reactions. Herein, a variety of palladium on activated were prepared by varying the content ‘Pd’ via in situ reduction method, using hydrogen reducing agent. The as-prepared (0.5 wt % Pd/C, 1 2 Pd/C 3 Pd/C) characterized X-ray diffraction (XRD), scanning elec...

2009
Klaas Mennecke Andreas Kirschning

The preparation of monolithic polyionic supports which serve as efficient heterogeneous supports for palladium(0) nanoparticles is described. These functionalized polymers were incorporated inside a flow reactor and employed in Suzuki-Miyaura and Heck cross couplings under continuous flow conditions.

2007
Joseph R. Martinelli Stephen L. Buchwald Camille Dreyfus Robert W. Field

Chapter 1. Suzuki-Miyaura coupling reactions of aryl and heteroaryl halides with aryl-, heteroaryl and vinyl boronic acids proceed in very good to excellent yield with the use of 2-(2',6'-dimethoxybiphenyl)dicyclohexylphosphine, SPhos. Additionally, a comparison of the reactions with SPhos and with 2(2',4',6'-triisoprocpylbiphenyl)-diphenylphosphine is presented that is informative in determini...

Journal: :The Journal of organic chemistry 2014
Agnieszka Bodzioch Minyan Zheng Piotr Kaszyński Greta Utecht

Transformations of functional groups OCOPh, OCH2Ph, I, NO2, and CO2Me in Blatter's radical derivatives 1-5 were investigated in order to develop synthetic tools for incorporation of the benzo[1,2,4]triazinyl system into complex molecular architectures. Thus, basic hydrolysis of OCOPh or Pd-catalyzed debenzylation of OCH2Ph gave phenol functionality, which was acylated and alkylated. Pd-catalyze...

2015
Nils Marsch Peter G Jones Thomas Lindel

The synthesis and reactivity of indole derivatives substituted in the benzene section was studied. Starting materials 4- and 6-iodoindole were conveniently prepared via the Batcho-Leimgruber route and purified by sublimation. Novel vicinally indolyl-substituted cyclopentanols with unexpected cis-configuration were formed by SmI2-mediated reductive dimerization of a 4-(indol-6-yl)butenone, obtai...

2017
Adrian Donner Kay Hagedorn Lorenz Mattes Markus Drechsler Sebastian Polarz

Processing of substrates with different solvent compatibility is a persistent problem in homogeneous catalysis, in particular when one starting compound is water soluble and the other is not. A promising concept reported in the literature is micellar catalysis. However, the process of developing catalysts that are surfactants at the same time is still in its early stages. We report the synthesi...

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