Results 41 to 50 of about 19,238 (306)

Electrochemical Synthesis of Isoxazoles and Isoxazolines via Anodic Oxidation of Oximes

open access: yesChemElectroChem, 2023
Isoxazol(in)es are widely featured structural motifs in natural products, agrochemicals, and pharmaceuticals. The first intermolecular approach for a direct electrochemical synthesis from readily available aldoximes is reported.
Silja Hofmann   +4 more
doaj   +1 more source

5-Chloroisoxazoles: A Versatile Starting Material for the Preparation of Amides, Anhydrides, Esters, and Thioesters of 2H-Azirine-2-carboxylic Acids

open access: yesMolecules, 2022
Amides, anhydrides, esters, and thioesters of 2H-azirine-2-carboxylic acids were prepared by a rapid procedure at room temperature involving FeCl2-catalyzed isomerization of 5-chloroisoxazoles to 2H-azirine-2-carbonyl chlorides, followed by reaction with
Anastasiya V. Agafonova   +2 more
doaj   +1 more source

Development of the novel isoxazolo[3,4-d]pyridazinone scaffold, which positively modulates the metabotropic glutamate receptor subtypes 2 and 4 [PDF]

open access: yes, 2022
The seven transmembrane (7TM) superfamily, also known as G-protein coupled receptors (GPCR), are one of the largest superfamilies in the human genome.
Gates, Christina Ann
core   +1 more source

Photocycloaddition of aromatic and aliphatic aldehydes to isoxazoles: Cycloaddition reactivity and stability studies

open access: yesBeilstein Journal of Organic Chemistry, 2011
The first photocycloadditions of aromatic and aliphatic aldehydes to methylated isoxazoles are reported. The reactions lead solely to the exo-adducts with high regio- and diastereoselectivities. Ring methylation of the isoxazole substrates is crucial for
Axel G. Griesbeck   +3 more
doaj   +1 more source

Electrocyclizations of Conjugated Azapolyenes Produced in Reactions of Azaheterocycles with Metal Carbenes

open access: yesOrganics, 2021
Conjugated azapolyenes (azabuta-1,3-dienes, aza-/diaza-/oxaza-/oxadiazahexa-1,3,5-trienes) are highly reactive in electrocyclization reactions, which makes them convenient precursors for the synthesis of a wide range of four-, five-, and six-membered ...
Nikolai V. Rostovskii   +2 more
doaj   +1 more source

Gold-catalyzed [4+3]- and [4+2]-annulations of 3-en-1-ynamides with isoxazoles via novel 6π-electrocyclizations of 3-azahepta trienyl cations

open access: yesChemical Science, 2018
Gold-catalysed [4+3]- and [4+2]-annulations of 3-substituted 3-en-1-ynamides with isoxazoles were achieved with Au(i) and Au(i)/Zn(ii) catalysts respectively.
Sovan Sundar Giri, Rai‐Shung Liu
semanticscholar   +1 more source

Target Agnostic Photoaffinity Labelling by Sulfonylhydrazones. [PDF]

open access: yesAngew Chem Int Ed Engl
Sulfonyl hydrazones were identified as new photo‐crosslinkers exploiting their base catalyzed low‐energy photoactivation that leads to reactive carbenes. The amino acid promiscuity, their usefulness in proteomics application and the range of labelled targets including enzymes, a PPI target and a transcription factor suggests that sulfonyl hydrazones ...
Garami K   +9 more
europepmc   +3 more sources

Nitroimidazoles XIII. Synthesis of Substituted (1-Methyl-5-Nitro-2-Imidazolyl) Isoxazoles [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 1998
The beta0diketone derivatives of nitroimidazole were synthesized from the reaction of magnesium salt of beta-ketoaccids 3 with imidazolide 4. The raction of beta-diketones with hydroxylamine hydrochloride afforded either the isoxazoles or the 5-hydroxyl ...
Abbas Shafiee, Mohammad ALi Ebrahimzadeh
doaj  

An Intramolecular Wittig Approach toward Heteroarenes: Synthesis of Pyrazoles, Isoxazoles, and Chromenone-oximes.

open access: yesOrganic Letters, 2019
α-Halohydrazones/ketoximes are transformed into trisubstituted pyrazoles/disubstituted isoxazoles by treatment with phosphine, acyl chloride, and a base.
Pankaj V Khairnar   +7 more
semanticscholar   +1 more source

Cortical Excitability Before and After Long‐Term Perampanel Treatment for Epilepsy

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Antiseizure medications (ASMs), which may influence cortical excitability, are the mainstay of epilepsy treatment. Transcranial magnetic stimulation (TMS) helps evaluate cortical excitability. We assessed changes in TMS responses using serial TMS measurements in people treated with an adjunctive noncompetitive AMPA‐receptor ...
Robert M. Helling   +6 more
wiley   +1 more source

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