Results 261 to 270 of about 29,655,632 (304)

C—H Activation

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
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Understanding and Exploiting C—H Bond Activation

ChemInform, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Labinger, Jay A., Bercaw, John E.
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C–H activation

2014
The C–H activation reaction is a reaction that cleaves a carbon–hydrogen bond. Here the carbon–hydrogen bond is mostly referred to unactivated carbon–hydrogen bonds.
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Electrophilic C−H Activation at {Cp*Ir}:  Ancillary-Ligand Control of the Mechanism of C−H Activation

Journal of the American Chemical Society, 2006
Density functional calculations on the low-temperature cyclometalation of dimethylbenzylamine with [IrCl2Cp*]2/NaOAc have characterized a novel electrophilic activation pathway for C-H bond activation. C-H activation occurs from [Ir(DMBA-H)(kappa2-OAc)Cp*]+, and OAc plays a central role in determining the barrier for reaction.
Davies, David L., Donald, S.M.A., Al-Duaij, O., Macgregor, S.A., Polleth, M.   +4 more
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Concise Synthesis of Polysubstituted Carbohelicenes by a C−H Activation/Radical Reaction/C−H Activation Sequence

Angewandte Chemie, 2018
AbstractDisclosed herein is the merging of C−H activation and radical chemistry, enabling rapid access to a structurally diverse family of fused carbohelicenes through the fusion of α‐acetylnaphthalenes with alkynes under oxidative conditions. This cascade process exhibits exquisite chemoselectivity and regioselectivity.
Jiangliang Yin, Jingsong You
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Catalytic stereoselective benzylic C–H functionalizations by oxidative C–H activation and organocatalysis

Chemical Communications, 2009
An organocatalytic stereoselective alpha-alkylation reaction of aldehydes based on C-H activation is presented.
F. Benfatti, | M. G. Capdevila, | L. Zoli, | E. Benedetto, COZZI, PIER GIORGIO   +4 more
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C–H bond activation of ethylene by a zirconacycle

Chemical Communications, 2013
The reaction of C2H4 and β-SiH containing azasilazirconacycle Cp2Zr{κ(2)-N(SiHMe2)SiHMeCH2} (3), formed via a γ-abstraction reaction of Cp2Zr{N(SiHMe2)2}H (1), follows an unusual pathway in which a rare σ-bond metathesis reaction of ethylene generates a vinyl intermediate. That species undergoes a β-hydrogen abstraction under the reaction conditions to
KaKing, Yan, Aaron D, Sadow
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A Minimalist Approach to CH Activation by Copper

Helvetica Chimica Acta, 2006
AbstractThe complex [Cu2(1)2]2+ (1 = 1,3‐bis(1‐methyl‐1H‐benzimidazol‐2‐yl)benzene) undergoes slow oxidation by dioxygen in DMF solution to give the hydroxylated product [Cu2(2‐H)2]2+ (2 = 2,6‐bis(1‐methyl‐1H‐benzimidazol‐2‐yl)phenol) characterized by an X‐ray crystal‐structure analysis. The oxidation occurs much faster when CuII is mixed with 1 in the
Kuebel Pollak, Anita, Ruttimann, Stéphane Joséph, Dunn, Nichola, Melich, Xavier, Williams, Alan Francis, Bernardinelli, Gérald Hugues   +5 more
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Diastereoselective Remote CH Activation by Hydroboration

Chemistry – A European Journal, 2004
AbstractHydroboration of tetrasubstituted or trisubstituted alkenes with BH3 and subsequent thermolysis allows remote diastereoselective CH activation of neighboring aryl rings. Tetrasubstituted and trisubstituted 1,1‐diphenylethylene derivatives undergo a highly stereoselective 1,2‐rearrangement followed by remote CH activation to lead, after ...
Jesús A, Varela, Diego, Peña, Bernd, Goldfuss, Dmitri, Denisenko, Jiri, Kulhanek, Kurt, Polborn, Paul, Knochel   +6 more
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Carbonylative C–H Activations

2013
Transition metal-catalyzed carbonylation reactions represent an enormous toolbox for CO–X bond formation (X = C, N, O, etc.). While most coupling reactions take place with heteronucleophiles nowadays, carbonylations including C–H activation are attracting more and more attention because the use of stoichiometric amounts of organometallic reagents can ...
Matthias Beller, Xiao-Feng Wu
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