Introduction to Radical Addition
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Radical Addition sentence examples within single electron transfer
The degradation mechanism of BP-4 was proposed through theoretical calculations and intermediates identification that the first and dominant step of BP-4 oxidation with SO4 −/ OH is radical addition reaction rather than single electron transfer.
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The quantum chemical methods are used to clarify thermodynamic feasibility, favourable site, and characteristics of reactions between different oxygen-containing free radicals and DNP based on three reaction mechanisms of free radical addition, hydrogen atom abstraction, and single electron transfer.
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Radical Addition sentence examples within visible light induced
A visible-light-induced photoredox-catalyzed tandem radical addition/cyclization of 2-alkenylphenols and CBr4 is developed, providing efficient and practical access to various 4-arylcoumarins in a one-pot fashion.
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The method features visible light-induced generation of nucleophilic hybrid alkyl Pd radical intermediates, which upon radical addition at the imine moiety and a subsequent β-hydrogen elimination deliver substituted imines.
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Radical Addition sentence examples within hydrogen atom transfer
These cascades comprise perfluoroalkyl radical addition to the alkene moiety of a boronate complex, intramolecular hydrogen atom transfer (HAT), single electron oxidation, and 1,2-alkyl/aryl migration.
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The reaction proceeds through the generation of alkyl radicals by a light-promoted hydrogen atom transfer process followed by free radical addition to iminium ions generated in situ.
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Radical Addition sentence examples within density functional theory
The detailed catalytic mechanism of a series of paddlewheel complexes [Mo2L4] featuring Mo-Mo quadruply-bond on radical addition of CCl4 to 1-hexene was studied using density functional theory.
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Moreover, the results of control experiments, cyclic voltammetry experiments, and density functional theory (DFT) calculations indicated that the electrooxidative CDC reaction might involve both radical addition and nucleophilic addition processes.
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Radical Addition sentence examples within Transfer Radical Addition
A new strategy for the synthesis of sequence-regulated vinyl polymers based on a combination of iterative atom transfer radical additions (ATRAs) of vinyl monomers and acyclic diene metathesis (ADMET) polymerization was developed.
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In this study, the atom transfer radical addition (ATRA) reaction of olefins using bromomalonates as halogen-bonding donors was developed.
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Radical Addition sentence examples within Free Radical Addition
The degradation of MNC in the NBo/PS system was achieved through electron transfer, while the degradation of MNC in the NBo/H2O2 system was mainly achieved through free radical addition.
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The reaction proceeds through the generation of alkyl radicals by a light-promoted hydrogen atom transfer process followed by free radical addition to iminium ions generated in situ.
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Radical Addition sentence examples within Intramolecular Radical Addition
Upon dilution of reaction mixtures, the homolytic cleavage of Co-C bonds induced by visible light generates α -alkene acyl radicals that spontaneously undergo intramolecular radical addition to afford organocobalt functionalized cyclic polyesters and CO 2 -based polycarbonates with excellent regioselectivity.
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The sequential reaction process comprising the intramolecular radical addition of α-bromo-β-keto esters to olefins under photoredox catalysis, and subsequent cyclization to form cyclopropane proceeds in one-pot under exceptionally mild conditions at room temperature in the presence of 2,6-lutidine.
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Radical Addition sentence examples within Intermolecular Radical Addition
Herein, a radical triggered fragmentary cyclization cascade reaction of ene-ynamides is presented, providing a rapid access into [1,2]-annulated indoles by an intermolecular radical addition, intramolecular cyclization, desulfonylative aryl migration, and site-selective C(sp2)-N cyclization sequence.
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Visible light mediated atom economic intermolecular radical addition reaction of acyloxy nitroso compounds to electron-deficient alkenes is reported.
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Radical Addition sentence examples within Centered Radical Addition
The modification of highly oxygenated forskolin as well as manoyl and epi-manoyl oxide, two less functionalized model substrates sharing the same polycyclic skeleton, via intermolecular carbon-centered radical addition to the vinyl moiety has been investigated.
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A visible light photoredox-catalyzed N-centered radical addition/semipinacol rearrangement cascade of cycloalkanol-substituted 1H-indenes or styrenes with N-arylsulfonyl protected 1-aminopyridinium salts is presented.
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Radical Addition sentence examples within Tandem Radical Addition
A visible-light-induced photoredox-catalyzed tandem radical addition/cyclization of 2-alkenylphenols and CBr4 is developed, providing efficient and practical access to various 4-arylcoumarins in a one-pot fashion.
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Radical Addition sentence examples within Alkyl Radical Addition
A quaternary carbon center containing an oxindole motif is constructed via NHC-catalyzed transition-metal and aldehyde-free intermolecular Heck-type alkyl radical addition initiated annulation.
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Thus, diacyl peroxides can be employed as ideal arylating and alkylating reagents in organic synthesis, including C-H/N-H arylation/alkylation, aryl/alkyl radical addition to unsaturated bonds, hetero arylation/alkylation, eliminative arylation/alkylation, perfluoroalkylation etc.
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Radical Addition sentence examples within Cascade Radical Addition
A simple ammonium iodide salt in amide solvent catalyzes regioselective decarboxylative alkylation of C(sp3)-H bonds of N-aryl glycine derivatives, of C(sp2)-H bond of heteroarenes, and cascade radical addition to unsaturated bond followed by intramolecular addition to arene, with a broad scope of N-hydroxyphthalimide derived redox active esters under visible light irradiation.
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With olefin-tethered N-(acyloxy)phthalimides, a cascade radical addition/cyclization/alkynylation process can be implemented to obtain 1,5-enynes.
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Radical Addition sentence examples within Decarboxylative Radical Addition
We have developed an efficient photocatalytic decarboxylative radical addition/cyclization strategy to synthesize imidazo-isoquinolinone derivatives using inexpensive aromatic ketone photocatalysts.
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A photocatalytic decarboxylative radical addition bifunctionalization cascade for the synthesis of functionalized alcohols is described.
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Radical Addition sentence examples within Sulfonyl Radical Addition
Mechanistic studies indicated that ketyl radicals are formed from aroyl fluorides via oxidative quenching process of excited photocatalysis, allenyl radicals are generated from chemo specific sulfonyl radical addition to the 1,3-enynes, finally, unprecedented key allenyl and ketyl radical cross-coupling provides tetrasubstituted allenyl ketones.
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This cascade radical process has been triggered through a sulfonyl radical addition to alkynes using sodium sulfinates under electrochemical conditions.
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Radical Addition sentence examples within Induced Radical Addition
Mechanistic studies reveal that this reaction undergoes photo-induced radical addition/cyclization and hydrogen evolution cascade processes.
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The starting linear polyacetylene was soluble and fabricated as a good self-supporting membrane, and the following two polymerizations, photo-induced radical addition polymerization and acyclic diene metathesis polycondensation, were carried out in the membrane states.
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Radical Addition sentence examples within Nucleophilic Radical Addition
In this context the sunlight-induced nucleophilic radical addition to protonated heteroaromatic bases catalyzed by TiO2-based semiconductors could be considered as the genesis of the photocatalytic approach.
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And the radical C more easily attacks the protonated 2a, compared with unprotonated 2a, due to significantly lowered SOMO/LUMO energy difference between them to promote this nucleophilic radical addition.
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Radical Addition sentence examples within Dual Radical Addition
Here we report the successful generation and use of sulfinyl radicals in a dual radical addition/radical coupling with unsaturated hydrocarbons, where readily-accessed sulfinyl sulfones serve as the sulfinyl radical precursor.
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Here we report the successful generation and use of sulfinyl radicals in a dual radical addition / radical coupling with unsaturated hydrocarbons, where readily-accessed sulfinyl sulfones serve as the sulfinyl radical precursor.
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Radical Addition sentence examples within radical addition reaction
Characterization by Fourier transform infrared (FTIR) spectra and differential scanning calorimetry (DSC) indicated that the AOHBP could be grafted onto the macromolecules of XLPE through radical addition reaction on the vinyl during peroxide cross-linking process.
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Herein we report a photocatalytic oxidative radical addition reaction for the synthesis of unsymmetrical 1,4-dicarbonyl compounds.
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Radical Addition sentence examples within radical addition polymerization
The starting linear polyacetylene was soluble and fabricated as a good self-supporting membrane, and the following two polymerizations, photo-induced radical addition polymerization and acyclic diene metathesis polycondensation, were carried out in the membrane states.
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This hydrogel was synthesized by the redox free radical addition polymerization technique.
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Radical Addition sentence examples within radical addition onto
C-radicals readily generated through radical addition onto alkenyl aryl boronate complexes are shown to engage in 1,5-aryl migration reactions to provide 4-aryl-alkylboronic esters.
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This uranyl salt enables the remarkable smooth functionalization of unactivated (cyclo)alkanes, ethers, acetals, and amides via radical addition onto electrophilic olefins.
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Radical Addition sentence examples within radical addition mechanism
The results show that, in water, scavenging activity mainly occurs through a radical addition mechanism for both isomers, while, in the lipid-like environment, the radical addition process is favored for iso-moracin C, while, redox- and non-redox-type reactions can equally occur for moracin C.
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Detailed mechanistic experiments and density functional theory calculations suggest the formation of a cyclometalated ruthenium complex that is stabilized by the phosphoric acid diester anion and serves as a catalyst for C–H functionalization reactions and single-electron transfer to access C–H functionalization reactions via a deprotonation-radical addition mechanism.
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Radical Addition sentence examples within radical addition proces
7) of the aryl moiety unveiled the remarkable electrophilic nature of the second intramolecular radical addition process, which was also consistent with product yields and regioselectivity.
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Through a relay olefination and radical addition process, we were able to develop the cascade Wittig/hydroalkylation reactions induced by visible light.
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Herein, we report an intermolecular, enantioselective three-component radical vicinal dicarbofunctionalization reaction of olefins enabled by merger of radical addition and cross-coupling using photoredox and copper dual catalysis.
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The sequence relies on the radical addition of SF5Cl to the alkynyl p-system of 2-ethynyl anilines followed by a cyclization reaction.
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Furthermore, the divinyl compound was transformed into a HODAM-bearing diol via the radical addition of 2-mercaptoethanol to the vinyl groups.
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The results show that, in water, scavenging activity mainly occurs through a radical addition mechanism for both isomers, while, in the lipid-like environment, the radical addition process is favored for iso-moracin C, while, redox- and non-redox-type reactions can equally occur for moracin C.
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A protocol for stereoselective C-radical addition to a chiral glyoxylate-derived N-sulfinyl imine was developed through visible light-promoted photoredox catalysis, providing a convenient method for the synthesis of unnatural α-amino acids.
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The nitroso radical was generated from tert-butyl nitrite and triggered the radical addition/cyclization/iodination/oxidation sequences.
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This transformation demonstrated a broad substrate scope and presented excellent regioselectivity after radical addition and subsequent deprotonation to form the derivatized 1,5-dihydro-2H-pyrrol-2-one scaffold in one pot.
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Characterization by Fourier transform infrared (FTIR) spectra and differential scanning calorimetry (DSC) indicated that the AOHBP could be grafted onto the macromolecules of XLPE through radical addition reaction on the vinyl during peroxide cross-linking process.
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Two possible pathways have been investigated: (a) imine reduction followed by radical–radical coupling and (b) radical addition followed by product reduction.
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Block-copolymers were synthesized by radical addition–fragmentation chain-transfer (RAFT) polymerization using dithiobenzoate or trithiocarbonate chain-transfer agent depending on the first monomer, further forming the hydrophilic block.
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With the goal of accessing yet unknown SF5-cyclopropyl building blocks, the radical addition of SF5Cl to cyclopropenes was investigated.
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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.
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The reaction undergoes sequential decarbonylation and radical addition using aliphatic aldehyde as a cheap and abundant alkyl radical source.
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This work explores the termination reactions that lead to decreased control over polymer molecular weight and identifies a reaction leading to radical addition to the phenazine core.
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Under visible light irradiation, the resultant alkoxyalkyl radical directly engages in radical cross-coupling with α-amino radical from amino C-H bonds or radical addition with alkene or phenylacetylene, respectively.
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In addition, general remarks about the most important aspects of the chemical reactivity, including hydrogenation, halogenation, oxidation, reduction, cycloaddition reactions, and nucleophilic, electrophilic, and radical additions are presented.
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Specifically, we review (i) the spectroscopy of sulfur-containing astrochemical molecules in the condensed phase, (ii) atom and radical addition reactions, (iii) the thermal processing of sulfur-bearing ices, (iv) photochemical experiments, (v) the non-reactive charged particle radiolysis of sulfur-bearing ices, and (vi) sulfur ion bombardment of and implantation in ice analogues.
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A series of bifunctional phosphine compounds promising as γ-functionalized phosphine ligand precursors are conveniently synthesized by the radical addition of diphenylphosphine oxide (Ph2P(O)H) to allylic compounds under photoirradiation.
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Herein, recent advances of these compounds were summarized as five pathways according to their mechanisms: (1) radical addition and cyclization; (2) cyclization and ring-opening; (3) radical addition and coupling; (4) radical addition and elimination; (5) coupling with nucleophilic partners (C-H, N-H, O-H and S-H).
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A modular, stereoselective route to trisubstituted (Z)-alkenyl (MIDA)boronates is described, consisting of the radical addition-fragmentation of dithiocarbonates to 2-(MIDA)boronyl-3-(2'-fluoro-pyridyl-6'-oxy)-alkenes.
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