Results 61 to 70 of about 3,838,786 (204)

Double Carbon−Hydrogen Activation of 2-Vinylpyridine: Synthesis of Tri- and Pentanuclear Clusters Containing the μ-NC\u3csub\u3e5\u3c/sub\u3eH\u3csub\u3e4\u3c/sub\u3eCH═C Ligand [PDF]

open access: yes, 2008
Reactions of 2-vinylpyridine with the triruthenium complexes [Ru3(CO)12] and [Ru3(CO)10(μ-dppm)] leads to a previously unknown double carbon−hydrogen bond activation of the β-carbon of the vinyl group to afford the pentaruthenium and triruthenium ...
Azam, Kazi A.   +9 more
core   +1 more source

Long-Range C–H Bond Activation by Rh^(III)-Carboxylates [PDF]

open access: yes, 2014
Traditional C–H bond activation by a concerted metalation–deprotonation (CMD) mechanism involves precoordination of the C–H bond followed by deprotonation from an internal base. Reported herein is a “through-arene” activation of an uncoordinated benzylic
Fu, Ross   +5 more
core   +1 more source

A Personal Account on Industrial Collaborations in the Field of C–H Activation

open access: yesCHIMIA, 2021
In recent years, transition-metal-catalyzed C–H functionalization has emerged as a potentially greener alternative to classic cross-couplings and as a powerful tool to access complex functional molecules with improved step-economy.
Olivier Baudoin
doaj   +1 more source

Metal Nanoparticles as Sustainable Tools for C–N Bond Formation via C–H Activation

open access: yesMolecules, 2021
The design of highly active metal nanoparticles to be employed as efficient heterogeneous catalysts is a key tool for the construction of complex organic molecules and the minimization of their environmental costs.
Federica Valentini   +2 more
doaj   +1 more source

Visible light-driven C−H activation and C–C coupling of methanol into ethylene glycol

open access: yesNature Communications, 2018
Direct transformation of methanol into two- or multi-carbon compounds is extremely attractive but remains a challenge. Here, the authors report an efficient photocatalytic route to the transformation of methanol into ethylene glycol and hydrogen over a ...
Shunji Xie   +10 more
doaj   +1 more source

An Unusual Hydrogen Migration/C−H Activation Reaction with Group 3 Metals [PDF]

open access: yes, 2011
A novel hydrogen migration from the phenyl ring to the pyridine ring of an yttrium pyridyl complex supported by a 1,1′-ferrocene diamide ligand is reported.
Benitez, Diego   +5 more
core   +1 more source

Probing the C-H Activation of Linear and Cyclic Ethers at (PNP)Ir [PDF]

open access: yes, 2009
Interaction of the amido/bis(phosphine)-supported (PNP)Ir fragment with a series of linear and cyclic ethers is shown to afford, depending on substrate, products of α,α-dehydrogenation (carbenes), α,β-dehydrogenation (vinyl ethers), or decarbonylation ...
Chen, Chun-Hsing   +6 more
core   +1 more source

Recent Developments in Transition-Metal Catalyzed Direct C–H Alkenylation, Alkylation, and Alkynylation of Azoles

open access: yesMolecules, 2020
The transition metal-catalyzed C–H bond functionalization of azoles has emerged as one of the most important strategies to decorate these biologically important scaffolds. Despite significant progress in the C–H functionalization of various heteroarenes,
Su Chen   +4 more
doaj   +1 more source

Oxidation of Organometallic Platinum and Palladium Complexes Obtained from C−H Activation [PDF]

open access: yes, 2010
η^3-Cyclohexenyl and -indenyl Pt(II) and Pd(II) diimine complexes, which are generated via C−H activation of cyclohexene and indene by Pt and Pd hydroxy dimers, are selectively oxidized by Br_2, Na_2PtCl_6, and CuCl_2 to give halogenated organic products
Bercaw, John E.   +3 more
core  

Stereoselective Radical Translocations

open access: yesCHIMIA, 2008
The stereochemical outcome of intramolecular radical mediated hydrogen transfer (= radical translocation) is discussed. Low to excellent levels of stereocontrol are observed making such processes attractive for applications in target-oriented ...
Philippe Renaud   +5 more
doaj   +1 more source

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