Results 71 to 80 of about 106,461 (152)

Recent advances in C(sp3)–H bond functionalization via metal–carbene insertions

open access: yesBeilstein Journal of Organic Chemistry, 2016
The recent development of intermolecular C–H insertion in the application of C(sp3)–H bond functionalizations, especially for light alkanes, is reviewed.
Bo Wang, Di Qiu, Yan Zhang, Jianbo Wang
doaj   +1 more source

Methodology of the direct C–H bond functionalization in nitrogen-containing heterocycles [PDF]

open access: yes, 2013
Предложены два эффективных методологических подхода для проведения прямой функционализациии связи С(sp2)–H в альдонитронах. Палладий(II)-катализироуемое окислительное С–С сочетание с индолами и пирролами приводит к нитронам, содержащим N-оксидную функцию.
Varaksin, M. V.   +1 more
core  

Functionalization of carbon nanotubes with -CHn, -NHn fragments, -COOH and -OH groups

open access: yes, 2013
We present results of extensive theoretical studies concerning stability, morphology, and band structure of single wall carbon nanotubes (CNTs) covalently functionalized by -CHn(for n=2,3,4),-NHn(for n=1,2,3,4),-COOH and -OH groups. Our studies are based
Majewski, Jacek A.   +1 more
core   +1 more source

Metal-free alcohol-directed regioselective heteroarylation of remote unactivated C(sp3)–H bonds

open access: yesNature Communications, 2018
Direct remote C–H functionalization of aliphatic alcohols via alkoxy radicals is largely unexplored. Here, the authors report the C(sp3)-heteroaryl bond formation in aliphatic alcohols mediated by alkoxy radicals formed with a hypervalent iodine reagent.
Xinxin Wu   +8 more
doaj   +1 more source

Chemical functionalization of graphene

open access: yes, 2009
Experimental and theoretical results on chemical functionalization of graphene are reviewed. Using hydrogenated graphene as a model system, general principles of the chemical functionalization are formulated and discussed.
Boukhvalov, D. W., Katsnelson, M. I.
core   +1 more source

Experimental realization of catalytic CH_4 hydroxylation predicted for an iridium NNC pincer complex, demonstrating thermal, protic, and oxidant stability [PDF]

open access: yes, 2009
A discrete, air, protic, and thermally stable (NNC)Ir(III) pincer complex was synthesized that catalytically activates the CH bond of methane in trifluoroacetic acid; functionalization using NaIO_4 and KIO_3 gives the oxy ...
Ess, Daniel H.   +6 more
core   +1 more source

Threading Through Macrocycles Enhances the Performance of Carbon Nanotubes as Polymer Fillers

open access: yes, 2016
In this work we study the reinforcement of polymers by mechanically interlocked derivatives of single-walled carbon nanotubes (SWNTs). We compare the mechanical properties of fibers made of polymers and of composites with pristine single-walled carbon ...
Bernal, M. Mar   +8 more
core   +3 more sources

Acceleration of Nucleophilic CH Activation by Strongly Basic Solvents [PDF]

open access: yes, 2010
(IPI)Ru(II)(OH)_n(H_2O)_m, 2, where IPI is the NNN-pincer ligand, 2,6-diimidizoylpyridine, is shown to catalyze H/D exchange between hydrocarbons and strongly basic solvents at higher rates than in the case of the solvent alone.
Goddard, William A., III   +4 more
core   +1 more source

Functionalized adamantane: fundamental building blocks for nanostructure self-assembly

open access: yes, 2009
We report first principles calculations on the electronic and structural properties of chemically functionalized adamantane molecules, either in isolated or crystalline forms.
Assali, Lucy V. C.   +3 more
core   +1 more source

Regioselective Pd-catalyzed direct C1- and C2-arylations of lilolidine for the access to 5,6-dihydropyrrolo[3,2,1-ij]quinoline derivatives

open access: yesBeilstein Journal of Organic Chemistry, 2019
The Pd-catalyzed C–H bond functionalization of lilolidine was investigated. The use of a palladium-diphosphine catalyst associated to acetate bases in DMA was found to promote the regioselective arylation at α-position of the nitrogen atom of lilolidine ...
Hai-Yun Huang   +4 more
doaj   +1 more source

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