Results 21 to 30 of about 538,570 (408)
Visible-Light Assisted Covalent Surface Functionalization of Reduced Graphene Oxide Nanosheets with Arylazo Sulfones [PDF]
, 2023 We present an environmentally benign methodology for the covalent functionalization (arylation) of reduced graphene oxide (rGO) nanosheets with arylazo sulfones. A variety of tagged aryl units were conveniently accommodated at the rGO surface via visible light irradiation of suspensions of carbon nanostructured materials in aqueous media. Mild reaction
arxiv +1 more source
Aryl radical-mediated N-heterocyclic carbene catalysis
Nature Communications, 2021 There have been significant advancements in radical reactions using organocatalysts in modern organic synthesis. Recently, NHC-catalyzed radical reactions initiated by single electron transfer processes have been actively studied.
Yuki Matsuki +6 more
semanticscholar +1 more source
Efficient Copper-Catalyzed N-Arylation of Sulfoximines with Aryl Iodides and Aryl Bromides [PDF]
The Journal of Organic Chemistry, 2005 Two simple and inexpensive systems for copper-catalyzed N-arylations of sulfoximines with aryl bromides and aryl iodides have been developed. Using 10 mol % of a copper(I) salt in combination with 20 mol % of a 1,2-diamine and Cs2CO3 provides N-arylated sulfoximines in high yields. Various functional groups and heteroatoms are tolerated.
Joerg Sedelmeier, Carsten Bolm
openaire +4 more sources
Molecules, 2022 Natural cytokinines are a promising group of cytoprotective and anti-tumor agents. In this research, we synthesized a set of aryl carbamate, pyridyl urea, and aryl urea cytokinine analogs with alkyl and chlorine substitutions and tested their ...
Maxim Oshchepkov +8 more
doaj +1 more source
Journal of the American Chemical Society, 2020 We describe a new catalytic strategy to transcend the energetic limitations of visible light by electrochemically priming a photocatalyst prior to excitation.
Nicholas G W Cowper +3 more
semanticscholar +1 more source
Nickel-catalyzed electrochemical carboxylation of unactivated aryl and alkyl halides with CO2
Nature Communications, 2021 Electrochemical catalytic reductive cross couplings are powerful and sustainable methods to construct C−C bonds by using electron as the clean reductant. However, activated substrates are used in most cases.
Guo-Quan Sun +7 more
semanticscholar +1 more source
ChemInform Abstract: Palladium‐Catalyzed α‐Arylation of Aryl Nitromethanes. [PDF]
ChemInform, 2015 AbstractThe straightforward reaction tolerates various aryl and hetaryl substituents except ortho‐substituted aryl groups.
Kelsey F. VanGelder, Marisa C. Kozlowski
openaire +3 more sources
Synthesis of 2-aryl-benzothiazoles via Ni-catalyzed coupling of benzothiazoles and aryl sulfamates
Heterocyclic Communications, 2020 2-Aryl-benzothiazoles have been successfully synthesized via a simple coupling reaction between benzothiazoles and aryl sulfamates using a nickel catalyst. The nickel catalyst is inexpensive, reusable and commercially available.
Yu Xiaofeng +4 more
doaj +1 more source
Visible-Light Photocatalytic Reduction of Aryl Halides as a Source of Aryl Radicals
Molecules, 2022 Aryl- and heteroaryl units are present in a wide variety of natural products, pharmaceuticals, and functional materials. The method for reduction of aryl halides with ubiquitous distribution is highly sought after for late-stage construction of various ...
Jihong Lan +4 more
doaj +1 more source
Nickel-Mediated Hydrogenolysis of C–O Bonds of Aryl Ethers: What Is the Source of the Hydrogen? [PDF]
, 2012 Mechanistic studies of the hydrogenolysis of aryl ethers by nickel were undertaken with (diphosphine)aryl methyl ethers. A Ni(0) complex containing Ni–arene interactions adjacent to the aryl–O bond was isolated.
Agapie, Theodor +4 more
core +3 more sources