Results 71 to 80 of about 9,657 (231)

Photochemistry of Aromatic N‐Oxides in Water Probed by Time‐Resolved X‐ray Absorption Spectroscopy

Chemistry – A European Journal, EarlyView.
Time‐resolved XAS at the nitrogen and oxygen K‐edges is applied to the photorearrangement of two N‐oxides in water. Pyridine N‐oxide rapidly forms the oxaziridine isomer. Pyridazine N‐oxide undergoes ring opening to the diazo compound, without any evidence of intermediates.
Maximilian Paradiz Domínguez, Robby Büchner, Mattis Fondell, Albert M. Brouwer   +3 more
wiley   +1 more source

Conversion of Alkyl Azides to Diazo Compounds and the Azide-Site Selectivity: One-Pot Phosphine-Mediated Transient Protection of Azido Groups and Deprotective Transformation to Diazo Groups

A one-pot conversion of alkyl azides to diazo compounds is outlined. After azido group protection of α-azidocarbonyl compounds, treatment of the resulting phosphazides with silica gel in a wet solvent afforded α-diazo carbonyl products by azide ...
Kodai, Tanisawa, Takenori, Tomohiro, Hiroki, Tanimoto, Ryo, Adachi   +3 more
core   +1 more source

On the strong difference in reactivity of acyclic and cyclic diazodiketones with thioketones: experimental results and quantum-chemical interpretation

Beilstein Journal of Organic Chemistry, 2015
The 1,3-dipolar cycloaddition of acyclic 2-diazo-1,3-dicarbonyl compounds (DDC) and thioketones preferably occurs with Z,E-conformers and leads to the formation of transient thiocarbonyl ylides in two stages.
Andrey S. Mereshchenko, Alexey V. Ivanov, Viktor I. Baranovskii, Grzegorz Mloston, Ludmila L. Rodina, Valerij A. Nikolaev   +5 more
doaj   +1 more source

Monosubstituted N‐Arylhydroxylamine Chemistry: Integrating Contemporary Synthetic Approaches for the Efficient Construction of Diverse Heterocyclic Scaffolds

Chemistry – A European Journal, EarlyView.
Monosubstituted N‐arylhydroxylamines represent a unique subclass of hydroxylamines that act as pivotal intermediates in redox transformations and as versatile platforms for further synthetic transformations. They serve as key building blocks in the synthesis of architecturally complex heterocycles and other valuable organic compounds.
Michael G. Kallitsakis, Kyriakos D. Nikopoulos, Ioannis N. Lykakis   +2 more
wiley   +1 more source

Diarylmethyl Ethers for the Protection of Polyols

Journal of Chemistry, 2013
The paper discusses the use of diarylmethyl ethers for the protection of hydroxyl groups, in particular, carbohydrate hydroxyl groups. The formation of these ethers can be done nonselectively by the thermal reactions of diryldiazomethanes via a carbene ...
Sigthor Petursson
doaj   +1 more source

Lewis‐Acidic Properties and Catalytic Behavior of Hydroboration‐ and Diolysis‐Derived NHC‐Stabilized Borenium Cations

Chemistry – A European Journal, EarlyView.
A series of thirteen (N‐heterocyclic carbene) NHC‐stabilized borenium cations is synthesized from NHC→BH3 complexes via hydroboration and condensation with diols. The novel compounds are fully characterized. Eight crystal structures are presented. Kinetic and NMR data show how the structural features translate to catalytic activity in hydrosilylation ...
Michał Jakubczyk, Michaela Buziková, Matouš Kloda, Miroslava Litecká, Karel Škoch   +4 more
wiley   +1 more source

Remediation of Organic Pollutant for Wastewater Treatment by Employing Sustainable Graphene Oxide/NiO‐ZrO2/Zeolite Ternary Composite Material

CleanMat, EarlyView.
Graphene oxide/NiO‐ZrO2/zeolite ternary composite was synthesized hydrothermally. Efficient adsorption of Congo red onto GO/NiO‐ZrO2/zeolite composite was studied. ABSTRACT The present study employs a novel method for the synthesis of graphene oxide (GO) based ternary composite utilized for the adsorption of Congo red (CR), an anionic dye molecule. The
Hidaya Narzary, Nituraj Mushahary, Bipul Das, Sanjay Basumatary   +3 more
wiley   +1 more source

Catalytic asymmetric constructions of nitrogen, boron and carbon continuous stereogenic centers

Nature Communications
Precise construction of molecular chirality is a longstanding scientific challenge in synthetic chemistry. Although methods to enantioselectively assemble consecutive carbon stereocenters are abundant, courses to establish enriched continuous ...
Guan Zhang, Junyi Jia, Xuzhao Du, Bofan Feng, Kai Yang, Peiyuan Yu, Qiuling Song   +6 more
doaj   +1 more source

The Chemistry of Diazo-Compounds. [PDF]

Journal of the American Chemical Society, 1908
n ...
openaire   +1 more source

Performance of commercial polyamide membranes in pervaporation for dye removal: Impact of dye classes, colors, and surfactants

Journal of Chemical Technology &Biotechnology, EarlyView.
Abstract BACKGROUND Water reclamation in the textile industry is essential to reduce environmental impacts associated with high water consumption and pollutant discharge. Among emerging technologies, pervaporation (PV) has gained attention due to its high selectivity and efficiency in contaminant removal. However, there is still a lack of comprehensive
Miriam Albara, Angelo Oliveira Silva, Ricardo Antonio Francisco Machado, Cintia Marangoni   +3 more
wiley   +1 more source