Results 21 to 30 of about 79,802 (211)
Organocatalytic asymmetric bromohydroxylation of tri-substituted alkenes
Tetrahedron Chem, 2023 This work describes an effective enantioselective bromohydroxylation of tri-substituted alkenes with (DHQD)2PHAL as catalyst and H2O as nucleophile, providing a variety of corresponding optically active bromohydrins with up to 95% ee.
Jing Li +3 more
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A Simple Interpretation of Nucleophilic Reactivity
CHIMIA, 1962 Es werden der Begriff der nucleophilen Reaktivität eingeführt und die bei A-priori-Errechnungen der Geschwindigkeitskonstanten von heterolytischen Reaktionen auftretenden Schwierigkeiten kurz erörtert.
R.F. Hudson
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Nucleophilicity scale for n- and π-nucleophiles
Chemical Physics Letters, 2006 Abstract A recently introduced empirical nucleophilicity index for a series of n- and π-nucleophiles was evaluated. The index is based on the frontier molecular orbital information of the nucleophile and its electrophilic partner. The model is validated against kinetic data of alkenes, phosphanes, phosphites and amines interacting with the ...
Jaramillo, Paula +2 more
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Applications of the Conceptual Density Functional Theory Indices to Organic Chemistry Reactivity [PDF]
, 2016 Indexación: Web of ScienceTheoretical reactivity indices based on the conceptual Density Functional Theory (DFT) have become a powerful tool for the semiquantitative study of organic reactivity.
Domingo, Luis R. +2 more
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The Active Site Sulfenic Acid Ligand in Nitrile Hydratases Can Function as a Nucleophile [PDF]
, 2014 Nitrile hydratase (NHase) catalyzes the hydration of nitriles to their corresponding commercially valuable amides at ambient temperatures and physiological pH.
Holz, Richard C. +4 more
core +3 more sources
PLoS ONE, 2020 The alpha/beta-Hydrolases (ABH) are a structural class of proteins that are found widespread in nature and includes enzymes that can catalyze various reactions in different substrates.
Alexander Denesyuk +4 more
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Вісник Харківського національного університету: Серія xімія, 2020 Several approaches quantitatively describe the effect of surfactant micellar solution on the reaction rate. The most used among them are Piszkiewicz’s, Berezin’s, and Pseudophase Ion-Exchange (PIE) models.
Anna Laguta
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Asymmetric additions to dienes catalysed by a dithiophosphoric acid. [PDF]
, 2011 Chiral Brønsted acids (proton donors) have been shown to facilitate a broad range of asymmetric chemical transformations under catalytic conditions without requiring additional toxic or expensive metals.
Hamilton, Gregory +4 more
core +2 more sources
Specific nucleophile–electrophile interactions in nucleophilic aromatic substitutions
Organic & Biomolecular Chemistry, 2013 We herein report results obtained from an integrated experimental and theoretical study on aromatic nucleophilic substitution (S(N)Ar) reactions of a series of amines towards 1-fluoro-2,4-dinitrobenzene in water. Specific nucleophile-electrophile interactions in the title reactions have been kinetically evaluated.
Ormazábal Toledo, R. +3 more
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Nucleophilic cationization reagents [PDF]
Tetrahedron Letters, 2010 Nucleophilic cationization reagents fitted with aminooxy groups are described. Practical syntheses of mono- and bis-aminooxy tetraalkylammonium iodides including N-hydroxyethyl-functionalized analogs are reported. An oximation example using one of the reagents is presented to illustrate their use in synthesis of cationic materials.
Souvik, Biswas +3 more
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