Results 221 to 230 of about 48,033 (274)

Oxygen-enabled Fe-catalyzed heteroatom α-C(sp³)-H functionalization with nucleophiles. [PDF]

Chem Sci
Zhou X, Li J, Huang N, Zhao J, Qiao B, Gong H, Li P.   +6 more
europepmc   +1 more source

Metal-Coordinated Hydroxide as a Nucleophile: A Brief History

Zeitschrift Fur Anorganische Und Allgemeine Chemie, 2018
It is well known that a metal-bound hydroxido ligand is an efficient nucleophile around neutral pH. In a mechanistic sense, the presence and chemical reactivity of the coordinated hydroxido nucleophile are frequently invoked both in biomimetic chemistry ...
Allan Gainor Blackman, Lawrence R Gahan
exaly   +2 more sources

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Solvent Nucleophilicity

Journal of the American Chemical Society, 2004
The rates of the reactions of benzhydrylium ions (diarylcarbenium ions) with solvent mixtures of variable composition (water/acetonitrile, methanol/acetonitrile, ethanol/acetonitrile, ethanol/water, and trifluoroethanol/water) have been determined photometrically by conventional UV-vis spectroscopy, stopped-flow methods, and laser flash techniques.
Shinya, Minegishi, Shinjiro, Kobayashi, Herbert, Mayr   +2 more
openaire   +2 more sources

Nucleophilic Reactivities of Thiophenolates

The Journal of Organic Chemistry, 2021
The nucleophilic reactivities of substituted thiophenolates were determined by following the kinetics of their reactions with a series of quinone methides (reference electrophiles) in DMSO at 20 °C. The experimentally determined second-order rate constants were analyzed according to the Mayr-Patz equation log k = sN(N + E) to derive the nucleophile ...
Patrick M. Jüstel, Cedric D. Pignot, Armin R. Ofial   +2 more
openaire   +2 more sources

Reactions of Benzylboronate Nucleophiles

Synthesis, 2023
AbstractThis short review summarizes our laboratory’s development of benzylboronic esters as nucleophiles. Activation of the benzylboronic ester is achieved by irreversible coordination of an alkyllithium Lewis base to form a nucleophilic benzylboronate. This boronate was found to react with aldehydes, imines, ketones, and alkyl bromides.
Timothy J, Barker, Andrew, Bogatkevich, Dallas W, Crowder, Sophia G, Gierszal, Jacob C, Hayes, Michael R, Hollerbach, Richard W, Russell   +6 more
openaire   +2 more sources

Nucleophilic substitution with inversion of configuration at the nucleophile

The Journal of Organic Chemistry, 1985
Le traitement du methoxycarbonyl-10 mesyloxy-9 trimethylsiloxy-1 aza-6 tricyclo [5.3.1.0 2,6 ] undecane(I) avec le chlorure de lithium dans le DMF donne seulement le chloro-9 methoxycarbonyl-10 trimethylsiloxy-1 aza-6tricyclo [5.3.1.0 2,6 ] undecane; tandis que le traitement similaire de I avec le benzenethiolate de sodium produit le methoxycarbonyl-11
Clayton H. Heathcock, Thomas W. Von Geldern, Carlito B. Lebrilla, Wilhelm F. Maier   +3 more
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Hydrogen Bonding Lowers Intrinsic Nucleophilicity of Solvated Nucleophiles

Journal of the American Chemical Society, 2008
The relationship between nucleophilicity and the structure/environment of the nucleophile is of fundamental importance in organic chemistry. In this work, we have measured nucleophilicities of a series of substituted alkoxides in the gas phase.
Xin, Chen, John I, Brauman
openaire   +2 more sources

On the nucleophilicity of serine in enzymes

Journal of Theoretical Biology, 1968
Abstract Certain anionic nucleophiles containing cationic groups possess higher reactivities in displacement reactions with neutral substrates than would be predicted from their aqueous basicities. The explanation for this behavior has been applied to show how the serine moiety in an enzyme with, perhaps, relatively small assistance from a ...
J, Epstein, H O, Michel, W A, Mosher
openaire   +2 more sources