Results 31 to 40 of about 28,139,738 (307)

Enantioselective C–P Bond Formation through C(sp3)–H Functionalization [PDF]

open access: yes, 2023
An unprecedented enantioselective C–P bond formation has been developed through a C(sp3)–H activation in an oxidation step followed by an organocatalyzed hydrophosphonylation protocol. The asymmetric organocatalytic Pudovik reaction has been successfully
Devan , Horn   +6 more
core   +1 more source

Introducing Ion Mobility Mass Spectrometry to Identify Site-Selective C–H Bond Activation in N-Heterocyclic Carbene Metal Complexes [PDF]

open access: yes, 2022
The activation of C−H bonds in a selective manner still constitutes a major challenge from a synthetic point of view; thus, it remains an active area of fundamental and applied research. Herein, we introduce ion mobility spectrometry mass spectrometry-
Ibañez-Ibañez, Laura   +13 more
core   +1 more source

Identical Spin Multi-State Reactivity Towards C-H Bond Activation in High-valent Fe/Mn-Oxo/Hydroxo Species [PDF]

open access: yes, 2022
Activation of C-H bonds using an earth-abundant metal catalyst is one of the top challenges of chemistry where high-valent Fe/Mn-O/OH biomimic species play an important role. There are several open questions related to the comparative oxidative abilities
Abinash, SWAIN   +4 more
core   +2 more sources

Selective Activation of Methane C-H Bond in the Presence of Methanol [PDF]

open access: yes, 2019
Direct methane to methanol (MTM) conversion over heterogeneous catalysts is a promising route for valorization of methane. The methane C-H bond activation is considered as the key step of the MTM and is the focus of considerable research activity ...
Yongjie Xi (8064173)   +3 more
core   +1 more source

Recent Advancement in Palladium Catalysed C-C bond Activation of Strained Ring Systems: Three and four-membered carbocycles as prominent C3/C4 building blocks [PDF]

open access: yes, 2022
In recent years, transition metal catalysed strong C-C bond activation has significantly attracted the attention of synthetic chemists. This enables simultaneous and direct functionalization of two different M-C bonds.
Tanmayee, Nanda   +6 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

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]

open access: yes, 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.   +18 more
core   +1 more source

Csp3‒H Bond Activation Mediated by a Pd(II) Complex under Mild Conditions [PDF]

open access: yes, 2023
In this work, we disclose a new pentadentate pyridinophane ligand, N-methyl-N’-(2-methylpyryl)-2,11-diaza[3.3](2,6)pyridinophane (PicCH3N4), and its Pd(II) complexes.
Hanah, Na   +4 more
core   +2 more sources

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

open access: yes, 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   +4 more
core   +1 more source

Iron-Catalyzed C–H Bond Activation

open access: yesChemical Reviews, 2017
Catalytic C-H bond activation, which was an elusive subject of chemical research until the 1990s, has now become a standard synthetic method for the formation of new C-C and C-heteroatom bonds. The synthetic potential of C-H activation was first described for ruthenium catalysis and is now widely exploited by the use of various precious metals.
Rui Shang   +2 more
openaire   +3 more sources

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