Results 211 to 220 of about 220,271 (263)

C−H Activation for the Construction of C−B Bonds

Chemical Reviews, 2009
A number of studies were conducted to demonstrate C-H activation for the construction of C-B bonds. Investigations revealed that the conversion of C-H bonds to C-B bonds was both thermodynamically and kinetically favorable. The reaction at a primary C-H bond of methane or a higher alkene B 2(OR)4 formed an alkylboronate ester R' -B(OR)2 and the ...
Ibraheem A I, Mkhalid, Jonathan H, Barnard, Todd B, Marder, Jaclyn M, Murphy, John F, Hartwig   +4 more
openaire   +2 more sources

CH Bond Activation by f‐Block Complexes

Angewandte Chemie International Edition, 2014
AbstractMost homogeneous catalysis relies on the design of metal complexes to trap and convert substrates or small molecules to value‐added products. Organometallic lanthanide compounds first gave a tantalizing glimpse of their potential for catalytic CH bond transformations with the selective cleavage of one CH bond in methane by bis ...
Polly L, Arnold, Max W, McMullon, Julia, Rieb, Fritz E, Kühn   +3 more
openaire   +2 more sources

The activation of CH bonds via RuRu bond fission

Inorganica Chimica Acta, 1996
Abstract Heating the isopropenylbenzene cluster, Ru 3 (CO) 8 (C 9 H 10 ) 1 , in heptane under reflux affords several products in low yield including the new metallacyclic cluster, Ru 3 (CO) 8 (C 9 H 8 ) 2 , in which the fission of an RuRu bond has induced the cleavage of two CH bonds with the concomitant formation of two RuC σ bonds.
Blake, Alexander J., Dyson, Paul J., Gaede, Petra E., Johnson, Brian F.G.   +3 more
openaire   +2 more sources

Rhodium-Catalyzed C–H Bond Functionalization with Amides by Double C–H/C–N Bond Activation

Organic Letters, 2016
The first C-H bond functionalization with amides as the coupling partners via selective activation of the amide N-C bond using rhodium(I) catalysts under highly chemoselective conditions is reported. Notably, this report constitutes the first catalytic activation of the amide N-C(O) bond by rhodium.
Guangrong, Meng, Michal, Szostak
openaire   +2 more sources

Insights into Sustainable C–H Bond Activation

2021
Over the recent past, the straight functionalization of inert C–H bond has already been identified as an advanced technique for the synthesis of organic molecules. It has provided a step-, pot- and atom-economic synthetic approach to attain structurally challenging organic scaffolds using simpler, pre-functionalized substrates by single operation and ...
Dewal S. Deshmukh, Vaishali S. Shende, Bhalchandra M. Bhanage   +2 more
openaire   +1 more source

Towards mild metal-catalyzed C–H bond activation

Chemical Society Reviews, 2011
Functionalizing traditionally inert carbon-hydrogen bonds represents a powerful transformation in organic synthesis, providing new entries to valuable structural motifs and improving the overall synthetic efficiency. C-H bond activation, however, often necessitates harsh reaction conditions that result in functional group incompatibilities and limited ...
Wencel-Delord, Joanna, Dröge, Thomas, Liu, Fan, Glorius, Frank   +3 more
openaire   +3 more sources

Hydrocarbon C—H Bond Activation with Tp'Pt Complexes

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Cynthia M. Norris, Joseph L. Templeton
openaire   +1 more source

Activation of the C–H bond by metal complexes

Russian Chemical Reviews, 1990
Reactions involving the cleavage of C–H bonds by metal complexes in saturated and aromatic hydrocarbons and also in other compounds are examined. Some of these processes occur with formation of a carbon–metal bond, whilst in others the interaction of the complexes with the hydrocarbon takes place without direct contact between the metal atom and the C ...
Aleksandr E Shilov, Georgiy B Shul'pin
openaire   +1 more source

Activation and Functionalization of C—H Bonds

2004
Activation and Functionalization of C-H Bonds explores recent developments in the reaction chemistry of solution-phase transition-metal based systems with simple hydrocarbons and with more complex organic molecules. More than 20 internationally leading research groups contributed to this volume, and their chapters cover such topics as fundamental ...
openaire   +1 more source

Activation of CH bonds by transition metals

Journal of Organometallic Chemistry, 1977
Abstract Reaction of R 2 PCH 2 C 6 H 5 (R = cyclohexyl or t-butyl) with [(COT) 2 RhCl] 2 , [(COT) 2 IrCl] 2 , PdCl 2 or PtCl 2 (benzonitrile) 2 yields cyclometallated compounds. The reactivity appears to decrease in the order Ir I ρ Rh I ρ ρ Pd II ≈ Pt II , suggesting a different reaction mechanism for univalent and bivalent d 8 metal atoms.
S. Hietkamp, D.J. Stufkens, K. Vrieze
openaire   +1 more source