Showing 81 - 100 results of 119 for search '"elimination reaction"', query time: 0.14s Refine Results
  1. 81

    A Facile Route to C2-Substituted Imidazolium Ionic Liquids by Scott T. Handy, Elliot Ennis

    Published 2009-06-01
    “…It works well for non-functionalized alkyl chlorides, and less well for alkyl bromides and iodides, likely due to competing elimination reactions. The resulting C2-substituted salts can be transformed into ionic liquids via standard anion metathesis reactions.…”
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    Article
  2. 82

    A metathesis approach to aromatic heterocycles by Donohoe, T, Orr, A, Gosby, K, Bingham, M

    Published 2005
    “…Double allene coupling, RCM and elimination reactions are also possible and allow the formation of biaryl systems. © Wiley-VCH Verlag GmbH and Co. …”
    Journal article
  3. 83

    Cationic 31-pyridylation of a chlorophyll-a derivative using Barluenga reagents by Yuki Takarada, Shin Ogasawara, Hitoshi Tamiaki

    Published 2023-01-01
    “…Similar addition–elimination reactions with synthetic Barluenga reagent analogs possessing p-methyl, methoxy, and amino groups on the pyridine ligand afforded the 31-(p-substituted pyridinio) counterparts. …”
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    Article
  4. 84

    Anethole Isomerization and Dimerization Induced by Acid Sites or UV Irradiation by Elena Stashenko, Jairo René Martínez, Hans T. Castro

    Published 2010-07-01
    “…The formation of cis-anethole and various dimers as a result of the exposure of trans-anethole to microporous solid acids (dealuminated HY zeolites), or UV-Vis irradiation was established by means of high resolution gas chromatography coupled to mass spectrometry. 3,4-bis-(4-Methoxyphenyl)-(E)-hex-2-ene was the most abundant compound among eight different methoxyphenyl-disubstituted hexenes produced by electrophilic addition and elimination reactions induced by HY zeolites. (1a,2a,3b,4b)-1,2-bis(4-Methoxyphenyl)-3,4-dimethylcyclobutane was the principal component in the mixture of 5 methoxyphenyl-disubstituted cyclobutanes found, together with cis-anethole, after UV-Vis irradiation of a trans-anethole solution in toluene.…”
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    Article
  5. 85

    Extraction of Diterpene-Phytochemicals in Raw and Roasted Coffee Beans and Beverage Preparations and Their Relationship by Fábio Junior Moreira Novaes, Maria Alice Esteves da Silva, Diana Cardoso Silva, Francisco Radler de Aquino Neto, Claudia Moraes Rezende

    Published 2023-04-01
    “…Sixteen compounds were identified as degradation products, ten derived from kahweol and six from cafestol, produced by oxidation and inter and intramolecular elimination reactions, with the roasting degree (relationship between time and temperature) being the main factor for thermodegradation and the way of preparing the beverage responsible for the content of these substances in them.…”
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    Article
  6. 86

    Supramolecular catalysis with ethers enabled by dual chalcogen bonding activation by Zhiguo Zhao, Yuanling Pang, Ziqiang Zhao, Pan-Pan Zhou, Yao Wang

    Published 2023-10-01
    “…Herein, we describe a distinctive activation mode, dual Se···π and Se···O bonding, that could activate benzylic as well as allylic ether C-O σ-bonds to achieve cyclization, coupling and elimination reactions. This dual Se···π and Se···O bonding catalysis approach could tolerate various alkoxide leaving groups, while the other representative weak interaction donors showed no catalytic activity.…”
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    Article
  7. 87

    Silicon Nitride Etch via Oxidation Reaction in Fluorocarbon/Oxygen Plasma: A First-Principle Study by Yu-Hao Tsai, Du Zhang, Mingmei Wang

    Published 2018-09-01
    “…We simulated the N-elimination reactions involving the formation and desorption of NO and FNO molecules as well as the substitution with F atoms. …”
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    Article
  8. 88

    Synthesis and characterisation of complexes of Group 13 metal amidinate heterocycles with the CpFe(CO)2 fragment. by Jones, C, Aldridge, S, Gans-Eichler, T, Stasch, A

    Published 2006
    “…The first examples of complexes between a 4-membered amidinato-Group 13 metal(III) heterocycle and a transition metal fragment are formed in salt elimination reactions between Na[CpFe(CO)2] and [MX2(amid)], M=Al, Ga or In; X=Cl or Br; amid-=[(RN)2CBut]-; R=Pri or cyclohexyl (Cy). …”
    Journal article
  9. 89

    1,3-Dibromo-5,5-dimethylhydantoin as a Precatalyst for Activation of Carbonyl Functionality by Klara Čebular, Bojan Đ. Božić, Stojan Stavber

    Published 2019-07-01
    “…In this context, there is a constant need for development of and improvement in the methods for addition-elimination reactions via activation of carbonyl functionality. …”
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    Article
  10. 90

    Protein engineering for natural product biosynthesis: expanding diversity for therapeutic applications by Sarah Oluwatobi Otun, Jordy Alexis Lerma-Escalera, Khayalethu Ntushelo, Ikechukwu Achilonu

    Published 2023-06-01
    “…This is attributed to its numerous advantages (over direct isolation from plants or via chemical synthesis), including decreasing or eliminating reaction byproducts, high precision, moderate handling of intricate and chemically unstable chemicals, overall reusability, and cost efficiency. …”
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    Article
  11. 91

    Highly selective transformation of poly[(R)-3-hydroxybutyric acid] into trans-crotonic acid by catalytic thermal degradation. by Ariffin, Hidayah, Nishida, Haruo, Shirai, Yoshihito, Hassan, Mohd Ali

    Published 2010
    “…It was suggested that the Mg catalysts promote the totality of the β-elimination reactions by acting throughout the beginning and main processes, resulting in a lowering in the degradation temperature and the completely selective transformation of PHB.…”
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    Article
  12. 92

    Sustainability Improvement of Chemical Processes using Amino Ionic Liquids as Catalysts in Water by P. Primerano, M.F. Milazzo, F. Risitano

    Published 2015-05-01
    “…Within the development of chemical processes, according to Green Chemistry and Engineering guidelines, the use of solvents, given their toxicity, must be greatly reduced or eliminated. Reactions, realized in the absence of solvent or using water, would be desirable. …”
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    Article
  13. 93

    Reductive Cytochrome P450 Reactions and Their Potential Role in Bioremediation by James B. Y. H. Behrendorff, James B. Y. H. Behrendorff

    Published 2021-04-01
    “…Under hypoxic conditions P450s can perform reductive reactions, contributing electrons to drive reductive elimination reactions. P450s can catalyse dehalogenation and denitration of a range of environmentally persistent pollutants including halogenated hydrocarbons and nitroamine explosives. …”
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    Article
  14. 94

    Mapping the hydrophobic substrate binding site of phenylalanine ammonia lyase from Petroselinum crispum by Nagy, EZA, Tork, SD, Lang, PA, Filip, A, Irimie, FD, Poppe, L, Toşa, MI, Schofield, CJ, Brem, J, Paizs, C, Bencze, LC

    Published 2019
    “…The biocatalytic utility of the tailored PcPAL mutants was demonstrated by the efficient preparative scale synthesis of (S)-m-bromo-phenylalanine (ee: > 99%, yield: 60%) and (R)-p-methyl-phenylalanine (ee: 97%, yield: 49%), using the corresponding ammonia addition and ammonia elimination reactions catalyzed by the L134A and I460V PcPAL variants, respectively. …”
    Journal article
  15. 95

    Effect of Alkali Metals and Alkaline Earth Metals Hydroxides on the Structure of Wool Fibers by M. Abou Taleb, S. Mowafi, C. Vineis, A. Varesano, D.O. Sanchez Ramirez, C. Tonetti, H. El-Sayed

    Published 2022-09-01
    “…Cystine, glycine, and the basic amino acids are the most affected species in the treated wool. Some elimination reactions were involved during alkaline treatment of wool; namely decarboxylation, desulphydration, and deamination. …”
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    Article
  16. 96

    Terpene Synthases as Metabolic Gatekeepers in the Evolution of Plant Terpenoid Chemical Diversity by Prema S. Karunanithi, Philipp Zerbe

    Published 2019-10-01
    “…Terpene synthase (TPS) enzymes are the gatekeepers in generating terpenoid diversity by catalyzing complex carbocation-driven cyclization, rearrangement, and elimination reactions that enable the transformation of a few acyclic prenyl diphosphate substrates into a vast chemical library of hydrocarbon and, for a few enzymes, oxygenated terpene scaffolds. …”
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    Article
  17. 97

    Glycopyranosylidene-Spiro-Morpholinones: Evaluation of the Synthetic Possibilities Based on Glyculosonamide Derivatives and a New Method for the Construction of the Morpholine Ring by Nándor Kánya, Sándor Kun, László Somsák

    Published 2022-11-01
    “…The 5-hydroxymorpholinones were subjected to oxidation and acid catalyzed elimination reactions to give the corresponding morpholine-3,5-dions and 5,6-didehydro-morpholin-3-ones, respectively. …”
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    Article
  18. 98

    Kinetic Study of the Effective Thermal Polymerization of a Prebiotic Monomer: Aminomalononitrile by Carlos Hortelano, Marta Ruiz-Bermejo, José L. de la Fuente

    Published 2023-01-01
    “…These analyses revealed that dehydrocyanation and deamination processes must be important elimination reactions involved in the complex AMN polymerization mechanism.…”
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    Article
  19. 99

    Decontamination of mustard sulfur and VX by sodium percarbonate complexed with 1-acetylguanidine as a novel activator by Lihong Qi, Boren Xiao, Lingce Kong, Yong Xu, Jinxing Yang, Guomin Zuo

    Published 2023-01-01
    “…Meanwhile, the degradation products detected by gas chromatography/mass spectrometry (GC/MS), liquid chromatography/mass spectrometry (LC/MS) and ion chromatography (IC) indicated that the oxidation and elimination reactions should have occurred on HD molecule, while the degradation of VX mainly originate from the nucleophilic substitution and oxidation reactions. …”
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    Article
  20. 100

    Bulky guanidinato and amidinato zinc complexes and their comparative stabilities. by Jones, C, Furness, L, Nembenna, S, Rose, R, Aldridge, S, Stasch, A

    Published 2010
    “…The preparation of a series of amidinato and guanidinato zinc halide complexes incorporating ligands of varying steric bulk is described, and their thermal stabilities compared. Salt elimination reactions between [M(Giso)] (M = K or Li; Giso = [(ArN)(2)CNCy(2)](-), Ar = 2,6-diisopropylphenyl, Cy = cyclohexyl) and ZnX(2) (X = I or Br) have yielded the monomeric complexes [(Giso)ZnI] and [(Giso)Zn(mu-Br)(2)Li(OEt(2))(2)]. …”
    Journal article