Results 21 to 30 of about 29,655,632 (304)

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

A synthetic, catalytic and theoretical investigation of an unsymmetrical SCN pincer palladacycle [PDF]

open access: yesRoyal Society Open Science, 2016
The SCN ligand 2-{3-[(methylsulfanyl)methyl]phenyl}pyridine, 1, has been synthesized starting from an initial Suzuki–Miyaura (SM) coupling between 3-((hydroxymethyl)phenyl)boronic acid and 2-bromopyridine.
Gavin W. Roffe   +10 more
doaj   +1 more source

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

Direct C–H Arylation

open access: yesCHIMIA, 2022
Bonds between hydrogen and carbon atoms are the most frequent type of bonds in organic molecules. The ability to replace hydrogen atoms by making other types of bonds to carbon atoms can enable simpler access to complex organic molecules by substituting
Jyoti Dhankhar, Ilija Čorić
doaj   +1 more source

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   +3 more
core   +2 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

Selectivity of C–H Activation and Competition between C–H and C–F Bond Activation at Fluorocarbons [PDF]

open access: yesChemical Reviews, 2017
Partially fluorinated alkanes, arenes, and alkenes can be transformed by a variety of transition metal and lanthanide systems. Although the C-H bond is weaker than the C-F bond regardless of the hybridization of the carbon, the reaction of the C-F bond at the metal is usually more exothermic than the corresponding reaction of the C-H bonds.
Odile Eisenstein   +2 more
openaire   +3 more sources

Multiple C–H Activation Enabled Modular Construction of Densely Functionalized Sulfur-Contained Arenes [PDF]

open access: yes, 2021
Modular construction of multiple functionalized arenes from abundant feedstocks, stands as an unremitting pursue goal in synthetic chemistry, which would accelerate the discovery of new drugs an advanced materials.
Jianhang, Rao   +6 more
core   +1 more source

Direct Aniline Formation with Benzene and Hydroxylamine

open access: yesChemistry, 2023
A single-step method for aniline formation was examined. Using a vanadate catalyst with an iron oxide co-catalyst and hydroxylamine hydrochloride as the amine source, an up to 90% yield of aniline was obtained with high selectivity.
Ningyu Liu   +2 more
doaj   +1 more source

Direct Light Activation of Hypervalent Iodine Reagents: Substrate-Controlled C-C or C-H Alkynylation of Cyclopropanes [PDF]

open access: yes, 2022
We report the direct light activation of ethynylbenziodoxolone (EBX) reagents for the oxyalkynylation of aryl- and amino-cyclopropanes as well as styrenes. Irradiation with visible light at 440 nm promoted the reaction without the need of a photocatalyst.
Tin. V. T. , Nguyen, Jerome, Waser
core   +1 more source

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