Results 361 to 370 of about 629,880 (409)

Cyclic (alkyl)(amino)carbenes (CAACs): stable carbenes on the rise.

Accounts of Chemical Research, 2015
CONSPECTUS: Carbenes are compounds that feature a divalent carbon atom with only six electrons in its valence shell. In the singlet state, they possess a lone pair of electrons and a vacant orbital and therefore exhibit Lewis acidic and Lewis basic ...
Michèle Soleilhavoup, G. Bertrand
semanticscholar   +1 more source

Deaminative (Carbonylative) Alkyl-Heck-type Reactions Enabled by Photocatalytic C-N Bond Activation.

Angewandte Chemie, 2019
The palladium-catalyzed Heck reaction is a well-known, Nobel Prize winning transformation for producing alkenes. Unlike the alkenyl and aryl variants of the Heck reaction, the alkyl-Heck reaction is still underdeveloped owing to the competitive side ...
Xuan Jiang, Mao-Mao Zhang, Wei Xiong, Liang‐Qiu Lu, W. Xiao   +4 more
semanticscholar   +1 more source

Mechanistic Characterization of (Xantphos)Ni(I)-Mediated Alkyl Bromide Activation: Oxidative Addition, Electron Transfer, or Halogen-Atom Abstraction.

Journal of the American Chemical Society, 2019
Ni(I)-mediated single-electron oxidative activation of alkyl halides has been extensively proposed as a key step in Ni-catalyzed cross-coupling reactions to generate radical intermediates.
Justin B Diccianni, Joseph Katigbak, C. Hu, Tianning Diao   +3 more
semanticscholar   +1 more source

Guanidine Alkylation

ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A. V. Golounin, I. A. Larionova, V. A. Sokolenko   +2 more
openaire   +2 more sources

Visible-Light-Driven N-Heterocyclic Carbene-catalyzed γ- and ε-Alkylation with Alkyl Radicals.

Angewandte Chemie, 2019
The merging of photoredox catalysis and N-heterocyclic carbene (NHC) catalysis for γ- and ε-alkylation of enals with alkyl radicals was developed.
L. Dai, Zi‐Hao Xia, Yuan-Yuan Gao, Zhong-Hua Gao, Song Ye   +4 more
semanticscholar   +1 more source

Nickel-Catalyzed Enantioconvergent Reductive Hydroalkylation of Olefins with α-Heteroatom Phosphorus or Sulfur Alkyl Electrophiles.

Journal of the American Chemical Society, 2019
Substantial advances in enantioconvergent C(sp3)-C(sp3) bond formation reactions have been made in recent years through the use of transition-metal-catalyzed cross-coupling reactions of racemic secondary alkyl electrophiles with organometallic reagents ...
Shi-Jiang He, Jia-Wang Wang, Yan Li, Zheyuan Xu, Xiao-Xu Wang, Xi Lu, Yao Fu   +6 more
semanticscholar   +1 more source

Enantioselective Allylic Alkylation with 4-Alkyl-1,4-dihydro-pyridines Enabled by Photoredox/Palladium Cocatalysis.

Journal of the American Chemical Society, 2018
Highly regio- and enantioselective allylic alkylation has been achieved enabled by the merger of photoredox and palladium catalysis. In this dual catalytic process, alkyl radicals generated from 4-alkyl-1,4-dihydropyridines act as the coupling partners ...
Honghao Zhang, Jiaji Zhao, Shouyun Yu
semanticscholar   +1 more source

Alkylating properties of alkyl perfluoroazapropenyl ethers

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1976
AbstractLeitet man Z‐Perfluor‐ 2‐azapropen (I) in eine Suspension von Natriumalkoholaten in Dibutyläther, so entstehen Alkyl‐perfluorazapropenyläther (II).
Yu. A. Sizov, I. L. Knunyants, E. G. Bykhovskaya, A. F. Gontar   +3 more
openaire   +3 more sources

ChemInform Abstract: Alkylation of Acetonitrile

ChemInform, 1997
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Douglass F. Taber, Sue Kong
openaire   +4 more sources

Alkylation of heteroaryl alkyl metals by bistrialkylsilylperoxides

Tetrahedron, 1990
AbstractHeteroalkyl methyl metals obtained from (III)/LDA undergo methylation upon treatment with the silylperoxide (I) to give the compounds (IV); in addition, the trimethylsilyloxylation products (Va) and (Vb) as well as the silylation product (VIa) are formed.
E. Epifani, Saverio Florio, Luigino Troisi   +2 more
openaire   +3 more sources