Results 21 to 30 of about 12,869 (241)

Oxoammonium salts are catalysing efficient and selective halogenation of olefins, alkynes and aromatics

open access: yesNature Communications, 2021
Organohalides are widely used as synthetic precursors and target products, but for various halogenation reactions there is a need for effective catalysts to activate commercially available haleniums.
Weijin Wang   +6 more
doaj   +1 more source

Visible-Light-Induced Catalytic Selective Halogenation with Photocatalyst

open access: yesMolecules, 2021
Halide moieties are essential structures of compounds in organic chemistry due to their popularity and wide applications in many fields such as natural compounds, agrochemicals, and pharmaceuticals.
Truong Giang Luu   +2 more
doaj   +1 more source

Technical Note: Reactivity of C1 and C2 organohalogens formation – from plant litter to bacteria [PDF]

open access: yesBiogeosciences, 2012
C1/C2 organohalogens (organohalogens with one or two carbon atoms) can have significant environmental toxicity and ecological impact, such as carcinogenesis, ozone depletion and global warming.
J. J. Wang   +6 more
doaj   +1 more source

Synthesis, Anticancer Potential and Comprehensive Toxicity Studies of Novel Brominated Derivatives of Bacterial Biopigment Prodigiosin from Serratia marcescens ATCC 27117

open access: yesMolecules, 2022
Prodigiosins (prodiginines) are a class of bacterial secondary metabolites with remarkable biological activities and color. In this study, optimized production, purification, and characterization of prodigiosin (PG) from easily accessible Serratia ...
Jelena Lazic   +8 more
doaj   +1 more source

Selective Halogenation of Pyridines Using Designed Phosphine Reagents [PDF]

open access: yes, 2019
Halopyridines are key building blocks for synthesizing pharmaceuticals, agrochemicals, and ligands for metal complexes, but strategies to selectively halogenate pyridine C–H precursors are lacking.
Andrew, McNally   +2 more
core   +2 more sources

Intramolecular halogen–halogen bonds?

open access: yesPhysical Chemistry Chemical Physics, 2013
By analysing the properties of the electron density in the structurally simple perhalogenated ethanes, X3C-CY3 (X, Y = F, Cl), a previously overlooked non-covalent attraction between halogens attached to opposite carbon atoms is found. Quantum chemical calculations extrapolated towards the full solution of the Schrödinger equation reveal the complex ...
Johansson, Mikael P., Swart, Marcel
openaire   +5 more sources

Synthesis and Reactions of 3-Halogenated 2-CF3-Indoles

open access: yesMolecules, 2022
Halogenation of 2-trifluoromethylindole afforded 3-chloro-, 3-bromo- and 3-iodo derivatives in up to 98% yield. Methyl-, benzyl- and tosyl-groups can be installed at the nitrogen atom of prepared indoles in high yields by base catalyzed reaction with the
Vasiliy M. Muzalevskiy   +2 more
doaj   +1 more source

Halogenation of aromatic compounds: thermodynamic, mechanistic and ecological aspects

open access: yes, 1998
Biological halogenation of aromatic compounds implies the generation of reducing equivalents in the form of e.g. NADH. Thermodynamic calculations show that coupling the halogenation step to a step in which the reducing equivalents are oxidized with a ...
Dolfing J
core   +6 more sources

PyrH and PrnB crystal structures [PDF]

open access: yes, 2006
Determination of the three-dimensional structure of enzymes at atomic resolution is a key prerequisite for elucidation of molecular mechanisms of catalysis and catalysis mechanism prediction.
De Laurentis, Walter
core   +2 more sources

Halogenation as a Strategy to Improve Antiplasmodial Activity: A Report of New 3-Alkylpyridine Marine Alkaloid Analogs [PDF]

open access: yesInternational Journal of Travel Medicine and Global Health, 2019
Introduction: Due to the emergence of resistance to antimalarial drugs as well as the lack of vaccination for malaria, there is an urgent demand for the development of new antimalarial alternatives.
Camila Barbosa   +6 more
doaj   +1 more source

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