Results 11 to 20 of about 29,722,087 (208)

Rhodium-Catalyzed C–H Bond Functionalization with Amides by Double C–H/C–N Bond Activation

open access: yesOrganic Letters, 2016
The first C-H bond functionalization with amides as the coupling partners via selective activation of the amide N-C bond using rhodium(I) catalysts under highly chemoselective conditions is reported. Notably, this report constitutes the first catalytic activation of the amide N-C(O) bond by rhodium.
Guangrong, Meng, Michal, Szostak
openaire   +3 more sources

Lowering the C-H Bond Activation Barrier of Methane Using SAC@Cu(111): A Periodic DFT Investigations [PDF]

open access: yes, 2021
Methane has long captured the world\u27s spotlight for being the simplest and yet one of the most notorious hydrocarbon. Exploring its potential to be converted into value added products has raised a compelling interest.
Meema, Bhati   +2 more
core   +2 more sources

Tandem C–O and C–H Activation at Palladium Enables Catalytic Direct C–H Alkenylation with Enol Pivalates [PDF]

open access: yes, 2021
The use of oxygen-based electrophiles in cross-coupling remains challenging for substrates with strong C–O bonds, with few examples that can combine C–O activation with an-other strong-bond activation in tandem.
Nahiane, Pipaon Fernandez   +4 more
core   +2 more sources

δ-C(sp3)H Activation of Free Alcohols Enabled by Rationally Designed H-Bond-Acceptor Ligands [PDF]

open access: yes, 2023
The ability to employ a wide range of native substrates is essential for the broad application of transition-metal-catalyzed C–H activation. Recent advances have made native carboxylic acids, ketones, and amines amenable to C(sp3)–H activation, but ...
Jin-Quan, Yu   +9 more
core   +2 more sources

C-H Bond Activation via Concerted Metalation-Deprotonation at a Palladium(III) Center [PDF]

open access: yes, 2022
Herein we report the direct observation of C-H bond activation at an isolated mononuclear Pd(III) center. The oxidation of the Pd(II) complex (MeN4)PdII(neophyl)Cl (neophyl = -CH2C(CH3)2Ph; MeN4 = N,N′-di-tert-butyl-2,11-diaza[3.3](2,6)pyridinophane ...
Dae Young, Bae   +7 more
core   +2 more sources

C—H Activation of Unbiased C(sp3)—H Bonds [PDF]

open access: yes, 2022
The selective functionalization of non-activated C(sp3)—H bonds is a major challenge in chemistry. Here, we have developed an [Au]-catalyzed C(sp3)-H activation of common 1 bromoalkynes into a library of diverse 3D-scaffolds.
Pablo, Barrio   +6 more
core   +2 more sources

Dehydrogenative Double C-H Bond Activation in a Germylene-Rhodium Complex*. [PDF]

open access: yesChemistry, 2021
Abstract Transition metal tetrylene complexes offer great opportunities for molecular cooperation due to the ambiphilic character of the group 14 element. Here we focus on the coordination of germylene [(Ar Mes2 ) 2 Ge :] (Ar
Bajo S   +3 more
europepmc   +8 more sources

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

Strain Release in CH Bond Activation? [PDF]

open access: yesAngewandte Chemie, 2009
What a relief! In 1955 the principle of strain release was put forward to explain the differing reactivity of axial and equitorial alcohols during oxidation. Our findings suggest that this same rationale may account for the differing rates of activation between axial and equitorial C–H bonds in C–H activation processes.
Chen, Ke   +2 more
openaire   +3 more sources

Ligand Accelerated Hydrogen Isotope Exchange: Switching C-H Activation from Functionalization Towards C-D Bond Formation [PDF]

open access: yes, 2023
Hydrogen isotope exchange (HIE) has emerged as a unique strategy for labelling, affording plenty of deuterated chemicals with varieties in patterns.
Jianfei, Bai   +6 more
core   +2 more sources

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