Results 11 to 20 of about 35,146,565 (216)

Rollover Cyclometalation as a Valuable Tool for Regioselective C–H Bond Activation and Functionalization

open access: yesMolecules, 2021
Rollover cyclometalation constitutes a particular case of cyclometallation reaction. This reaction occurs when a chelated heterocyclic ligand loses its bidentate coordination mode and undergoes an internal rotation, after which a remote C–H bond is ...
Antonio Zucca, Maria I. Pilo
doaj   +1 more source

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

Coumarins Synthesis and Transformation via C–H Bond Activation—A Review

open access: yesInorganics, 2022
For several decades, coumarins have attracted considerable attention due to the fact of their application in diverse fields such as medical science and biomedical research as well as several industrial branches.
Katarzyna Szwaczko
doaj   +1 more source

Undirected C-H Bond Activation in Aluminium Hydrido Enaminonates

open access: yesMolecules, 2023
Two new aluminium hydrido complexes were synthesized by reacting AlH3 with the enaminone ligand N-(4,4,4-trifluorobut-1-en-3-on)-6,6,6-trifluoroethylamine (HTFB-TFEA) in different molar ratios to obtain mono- and di-hydrido-aluminium enaminonates.
Chijioke Kingsley Amadi   +4 more
doaj   +1 more source

Strategies to transform remote C(sp3)-H bonds of amino acid derivatives

open access: yesTetrahedron Chem, 2022
Amino acids and peptides play an important role in nature as well as in the pharmaceutical industry. Therefore, transformation of amino acids and peptides into their unnatural derivatives via step and atom economical ways is highly demanding. Although, a
Supreeta Sen   +2 more
doaj   +1 more source

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

Divergent isoindolinone synthesis through palladium-catalyzed isocyanide bridging C–H activation

open access: yesCell Reports Physical Science, 2022
Summary: The formation of thermodynamically accessible metallacycle is crucial to achieve site-selective C–H bond activation. Here, we report an isocyanide-bridging C–H activation through the formation of a five-membered palladacycle. As such, a proximal
Fulin Zhang   +6 more
doaj   +1 more source

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