Results 31 to 40 of about 29,722,087 (208)

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

Beilstein 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, Haoran Li, Thierry Roisnel, Jean-François Soulé, Henri Doucet   +4 more
doaj   +1 more source

C–H Bond Activation at Palladium(IV) Centers [PDF]

Journal of the American Chemical Society, 2011
This communication describes the first observation and study of C-H activation at a Pd(IV) center. This transformation was achieved by designing model complexes in which the rate of reductive elimination is slowed relative to that of the desired C-H activation process.
Joy M, Racowski, Nicholas D, Ball, Melanie S, Sanford   +2 more
openaire   +2 more sources

Synergistic C-H bond activation across molybdenum-iridium multiply bonded complexes: a cascade of transformations. [PDF]

Chem Sci
International audienceeterobimetallic compounds offer unique opportunities for activating substrates through cooperative interactions between two distinct metal centers, potentially leading to catalytic reactivity beyond the reach of monometallic systems.
Dubrawski Z, Del Rosal I, Jeanneau E, Maron L, Thieuleux C, Camp C.   +5 more
europepmc   +2 more sources

Direct Light Activation of Hypervalent Iodine Reagents: Substrate-Controlled C-C or C-H Alkynylation of Cyclopropanes [PDF]

, 2022
We report the direct light activation of ethynylbenziodoxolone (EBX) reagents for the oxyalkynylation of aryl- and amino-cyclopropanes as well as styrenes. Irradiation with visible light at 440 nm promoted the reaction without the need of a photocatalyst.
Tin. V. T. , Nguyen, Jerome, Waser
core   +1 more source

Understanding trends in C–H bond activation in heterogeneous catalysis [PDF]

, 2018
A universal descriptor for the prediction of C–H bond activation barriers has been established, and combined with a thermodynamic analysis of methane activation, to provide design rules for various types of heterogeneous ...
Yoo, Jong Suk, Abild-Pedersen, Frank, Studt, Felix, Aljama, Hassan, Tsai, Charlie, Kulkarni, Ambarish R, Latimer, Allegra A, Nørskov, Jens K, Montoya, Joseph H   +8 more
core   +1 more source

C−H Bond Activation by Iridium(III) and Iridium(IV) Oxo Complexes [PDF]

, 2023
Oxidation of an iridium(III) oxo precursor enabled the structural, spectroscopic, and quantum-chemical characterization of the first well-defined iridium(IV) oxo complex.
Verplancke, H., Schneider, S., Fitterer, A., Holthausen, M.C., Delony, D., de Bruin, B., Tepaske, M.A., Neben, M.C., Holthausen, Max C., Delony, Daniel, Neben, Marc C., Verplancke, Henrdik, Tepaske, Martijn Alexander, Fitterer, Arnd, de Bruin, Bas, Schneider, Sven   +15 more
core   +1 more source

C2-Alkylation of N-pyrimidylindole with vinylsilane via cobalt-catalyzed C–H bond activation

Beilstein Journal of Organic Chemistry, 2012
Direct C2-alkylation of an indole bearing a readily removable N-pyrimidyl group with a vinylsilane was achieved by using a cobalt catalyst generated in situ from CoBr2, bathocuproine, and cyclohexylmagnesium bromide.
Zhenhua Ding, Naohiko Yoshikai
doaj   +1 more source

Mechanistic Study of Ru-NHC-Catalyzed Hydrodefluorination of Fluoropyridines: The Influence of the NHC on the Regioselectivity of C–F Activation and Chemoselectivity of C–F versus C–H Bond Cleavage [PDF]

, 2015
We describe a combined experimental and computational study into the scope, regioselectivity, and mechanism of the catalytic hydrodefluorination (HDF) of fluoropyridines, C5F5–xHxN (x = 0–2), at two Ru(NHC)(PPh3)2(CO)H2 catalysts (NHC = IPr, 1, and IMes,
Whittlesey, Michael K., Stuart A. Macgregor, Stuart A. Macgregor (1350846), Mary F. Mahon (1293876), Mahon, M.F., Mary F. Mahon, McKay, D., Riddlestone, Ian M., Mahon, Mary F., Whittlesey, M.K., David McKay, Michael K. Whittlesey (1309881), Mckay, David, David McKay (1351782), Macgregor, S.A., Ian M. Riddlestone (1340919), Macgregor, Stuart A., Ian M. Riddlestone, Michael K. Whittlesey, McKay, David; id_orcid   +19 more
core   +1 more source

C-H bond Activation/Arylation over Arene-Ruthenium(II)-picolinate Complexes: Synthesis, Structure and Catalytic Activity [PDF]

, 2017
A series of water soluble arene-ruthenium(II) complexes [(η6-arene)RuCl(κ2-L)]n+ (n = 0, 1) ([Ru]-1 – [Ru]-12) containing pyridine based N,O or N,N ligands (L1-L6) were synthesized and employed for the catalytic C-H bond activation/ arylation of 2 ...
Chinky, Binnani, Rohit K., Rai, Sanjay Kumar, Singh, Deepika, Tyagi, Shaikh M, Mobin   +4 more
core   +1 more source

Selectivity of C–H Activation and Competition between C–H and C–F Bond Activation at Fluorocarbons [PDF]

Chemical Reviews, 2017
Partially fluorinated alkanes, arenes, and alkenes can be transformed by a variety of transition metal and lanthanide systems. Although the C-H bond is weaker than the C-F bond regardless of the hybridization of the carbon, the reaction of the C-F bond at the metal is usually more exothermic than the corresponding reaction of the C-H bonds.
Odile Eisenstein, Jessica Milani, Robin N. Perutz   +2 more
openaire   +4 more sources