Results 11 to 20 of about 562,929 (255)

Intermolecular Radical C–H Bond Activation: A Powerful Tool for Late Stage Functionalization

open access: yesCHIMIA, 2020
The synthesis of complex molecules via radical reactions involving carbon–carbon and carbon–heteroatom bonds has become a very successful approach. Radical chemistry has long been dominated by the use of tin-based reagents.
Fabrice Dénès
doaj   +1 more source

Metal Nanoparticles as Sustainable Tools for C–N Bond Formation via C–H Activation

open access: yesMolecules, 2021
The design of highly active metal nanoparticles to be employed as efficient heterogeneous catalysts is a key tool for the construction of complex organic molecules and the minimization of their environmental costs.
Federica Valentini   +2 more
doaj   +1 more source

Lead-free B-site bimetallic perovskite photocatalyst for efficient benzylic C–H bond activation

open access: yesCell Reports Physical Science, 2021
Summary: Although bismuth (Bi)-based halide perovskites have attracted profound attention in photocatalysis, the undesirable photophysical properties are not well modulated, and the effect of surface structure on adsorption and activation of reactant ...
Ming Shi   +7 more
doaj   +1 more source

Computational exploration of the reaction mechanism of the Cu+-catalysed synthesis of indoles from N-aryl enaminones [PDF]

open access: yesRoyal Society Open Science, 2016
We have studied the role of Cu+-phenantroline as a catalyst in the cyclization of N-aryl-enaminones using density-functional theory computations. The catalyst was found to bind the substrate upon deprotonation of its eneaminone, and to dramatically ...
Carlos E. P. Bernardo, Pedro J. Silva
doaj   +1 more source

Ni-catalyzed benzylic β-C(sp3)–H bond activation of formamides

open access: yesNature Communications, 2022
The development of 3d-metal-catalyzed β-C–H bond activation via 4-membered metallacycles remains an elusive challenge. Here, the authors report a Ni-Al bimetal-catalyzed β-C(sp3)–H bond activation of formamides via 4-membered nickelacycles.
Rong-Hua Wang   +7 more
doaj   +1 more source

Co(III) Intermediates in Cobalt-Catalyzed, Bidentate Chelation Assisted C(sp2)-H Functionalizations

open access: yesInorganics, 2023
The C-H bond activation and functionalization is a powerful tool that provides efficient access to various organic molecules. The cobalt-catalyzed oxidative C-H bond activation and functionalization has earned enormous interest over the past two decades.
Aleksandrs Cizikovs, Liene Grigorjeva
doaj   +1 more source

Ligand Lone-Pair Influence on Hydrocarbon C-H Activation: A Computational Perspective [PDF]

open access: yes, 2010
Mid to late transition metal complexes that break hydrocarbon C-H bonds by transferring the hydrogen to a heteroatom ligand while forming a metal-alkyl bond offer a promising strategy for C-H activation.
Cundari, Thomas R.   +4 more
core   +2 more sources

Competitive Activation of a Methyl C−H Bond of Dimethylformamide at an Iridium Center [PDF]

open access: yes, 2009
During the synthesis of [AsPh_4][Ir(CO)_2I_3Me] by refluxing IrCl_3·3H_2O in DMF (DMF = dimethylformamide) in the presence of aqueous HCl, followed by sequential treatment with [AsPh_4]Cl, NaI, and methyl iodide and finally recrystallization from ...
Bercaw, John E.   +4 more
core   +1 more source

Intra- and Intermolecular C−H Activation by Bis(phenolate)pyridineiridium(III) Complexes [PDF]

open access: yes, 2011
A bis(phenolate)pyridine pincer ligand (henceforth abbreviated as ONO) has been employed to support a variety of iridium complexes in oxidation states I, III, and IV.
Bercaw, John E.   +2 more
core   +2 more sources

Long-Range C–H Bond Activation by Rh^(III)-Carboxylates [PDF]

open access: yes, 2014
Traditional C–H bond activation by a concerted metalation–deprotonation (CMD) mechanism involves precoordination of the C–H bond followed by deprotonation from an internal base. Reported herein is a “through-arene” activation of an uncoordinated benzylic
Fu, Ross   +5 more
core   +1 more source

Home - About - Disclaimer - Privacy