Articles with "radical addition" as a keyword



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Mechanism and kinetics of diuron oxidation by hydroxyl radical addition reaction

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Published in 2020 at "Environmental Science and Pollution Research"

DOI: 10.1007/s11356-020-07806-4

Abstract: Diuron is a phenyl urea herbicide used to control weeds in agricultural lands. The degradation of diuron in the atmosphere takes place dominantly via reaction with OH radicals. In this work, the OH addition reaction… read more here.

Keywords: diuron; oxidation; reaction; addition reaction ... See more keywords
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1,4-Phenylene-bis-((1-methyl-1H-pyrazol-5-yl)borinic 8-oxyquinolinate) as a photoredox catalyst in the atom transfer radical addition of iodoperfluoroalkanes to alkenyl groups bearing organoboron compounds

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Published in 2019 at "Tetrahedron Letters"

DOI: 10.1016/j.tetlet.2019.06.032

Abstract: Abstract The key photocatalytic properties of a transition-metal-free heteroleptic complex derived from 1,4-phenyldiboronic acid were evaluated. This compound was utilized in the atom transfer radical addition of iodoperfluoroalkanes to a series of alkenyl group bearing… read more here.

Keywords: bearing organoboron; radical addition; transfer radical; atom transfer ... See more keywords
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Radical addition of tetrahydrofuran to imines assisted by tert-butyl hydroperoxide

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Published in 2020 at "Tetrahedron Letters"

DOI: 10.1016/j.tetlet.2020.152150

Abstract: Abstract The TBHP-promoted selective radical addition of tetrahydrofuran to imines resulting in β-amino ethers has been developed. The presented radical method of β-amino ether synthesis is based on initiation by available TBHP and does not… read more here.

Keywords: addition tetrahydrofuran; tetrahydrofuran imines; amino ethers; radical addition ... See more keywords
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Regioselectivity of the OH Radical Addition to Uracil in Nucleic Acids. A Theoretical Approach Based on QM/MM Simulations.

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Published in 2017 at "Journal of chemical theory and computation"

DOI: 10.1021/acs.jctc.7b00610

Abstract: Oxidation of nucleic acids is ubiquitous in living beings under metabolic impairments and/or exposed to external agents such as radiation, pollutants, or drugs, playing a central role in the development of many diseases mediated by… read more here.

Keywords: addition; nucleic acids; addition uracil; regioselectivity ... See more keywords
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Diethylzinc-Mediated Radical 1,2-Addition of Alkenes and Alkynes.

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Published in 2021 at "Organic letters"

DOI: 10.1021/acs.orglett.1c00669

Abstract: A novel diethylzinc-mediated radical 1,2-addition of perfluoroalkyl iodides to unactivated alkenes and alkynes is presented, which demonstrates a novel way to generate an ethyl difluoroacetate radical. This method is highly efficient and gives full conversions… read more here.

Keywords: addition alkenes; diethylzinc mediated; mediated radical; radical addition ... See more keywords
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Decarboxylative Radical Addition to Methylideneoxazolidinones for Stereocontrolled Synthesis of Selectively Protected Diamino Diacids.

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Published in 2021 at "Organic letters"

DOI: 10.1021/acs.orglett.1c02684

Abstract: Syntheses of stereochemically pure and selectively protected diamino diacids can be achieved by redox decarboxylation of distal N-hydroxyphthalimide esters of protected aspartic, glutamic or α-aminoadipic acids via radical addition to methylideneoxazolidinones. The products are useful… read more here.

Keywords: addition; diamino diacids; addition methylideneoxazolidinones; protected diamino ... See more keywords
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Cu-Catalyzed Radical Addition and Oxidation Cascade: Unsymmetrical Trimerization of Indole to Access Isotriazatruxene.

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Published in 2022 at "Organic letters"

DOI: 10.1021/acs.orglett.2c00180

Abstract: Herein we describe a Cu-catalyzed radical addition and oxidation cascade reaction for the chemo/regioselective synthesis of unsymmetrical indole trimers (isotriazatruxenes, i-TATs) from easily available starting materials. The i-TATs exhibited blue fluorescence in various solvents with… read more here.

Keywords: addition oxidation; catalyzed radical; radical addition; oxidation cascade ... See more keywords
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From Styrenes to Fluorinated Benzyl Bromides: A Photoinduced Difunctionalization via Atom Transfer Radical Addition.

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Published in 2022 at "Organic letters"

DOI: 10.1021/acs.orglett.2c01699

Abstract: An operationally simple and practical method is disclosed to achieve the difunctionalization of styrenes, generating fluorinated benzyl bromides via a photoinduced atom transfer radical addition process. The developed method is mild, atom-economical, cost-effective, employs very… read more here.

Keywords: transfer radical; difunctionalization; atom transfer; fluorinated benzyl ... See more keywords
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Construction of N-Polyheterocycles by N-Heterocyclic Carbene Catalysis via a Regioselective Intramolecular Radical Addition/Cyclization Cascade.

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Published in 2022 at "Organic letters"

DOI: 10.1021/acs.orglett.2c01729

Abstract: N-Polyheterocycles are rapidly accessed by N-heterocyclic carbene (NHC) catalysis through regioselective sequential radical addition/cyclization in the absence of any metals or oxidants. The transformation occurs under mild conditions and enjoys a wide substrate scope with… read more here.

Keywords: catalysis; addition cyclization; radical addition; heterocyclic carbene ... See more keywords
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Visible-Light-Catalyzed Tandem Radical Addition/1,5-Hydrogen Atom Transfer/Cyclization of 2-Alkynylarylethers with Sulfonyl Chlorides.

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Published in 2022 at "Organic letters"

DOI: 10.1021/acs.orglett.2c01977

Abstract: A novel visible-light-catalyzed tandem radical addition/1,5-hydrogen atom transfer/cyclization cascade of 2-alkynylarylethers with sulfonyl chlorides in 2-methyltetrahydrofuran was developed under photocatalyst- and additive-free conditions. This reaction relies on unique energy transfer and solvent-radical relay strategies to… read more here.

Keywords: catalyzed tandem; transfer; light catalyzed; tandem radical ... See more keywords
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Copper-Catalyzed Radical Addition of Alkynols to Synthesize Difluoroheterocyclic Compounds.

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Published in 2023 at "Organic letters"

DOI: 10.1021/acs.orglett.3c00968

Abstract: A convenient method for the synthesis of fluorine-containing heterocyclic compounds was developed by a copper-catalyzed free radical addition reaction of alkynol and ethyl bromodifluoroacetate. This strategy involves copper-catalyzed free radical addition and molecular lactone exchange… read more here.

Keywords: addition alkynols; catalyzed radical; alkynols synthesize; radical addition ... See more keywords