Results 11 to 20 of about 211,692 (260)
Selective activation of CH bond of phenol in ortho-position into COH bond in a two-phase system
Catalysis Communications, 2021 A method for the selective activation of CH bond of phenol in ortho-position into C-OH bond was developed at room temperature over Cu2+ ions in a two-phase system using marginally water-soluble polar alcohols, acetonitrile and water as solvents and ...
Ke Zheng +4 more
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Metal Nanoparticles as Sustainable Tools for C–N Bond Formation via C–H Activation
Molecules, 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
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Strain Release in CH Bond Activation? [PDF]
Angewandte Chemie, 2009 What a relief! In 1955 the principle of strain release was put forward to explain the differing reactivity of axial and equitorial alcohols during oxidation. Our findings suggest that this same rationale may account for the differing rates of activation between axial and equitorial C–H bonds in C–H activation processes.
Ke, Chen +2 more
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Lead-free B-site bimetallic perovskite photocatalyst for efficient benzylic C–H bond activation
Cell Reports Physical Science, 2021 Summary: Although bismuth (Bi)-based halide perovskites have attracted profound attention in photocatalysis, the undesirable photophysical properties are not well modulated, and the effect of surface structure on adsorption and activation of reactant ...
Ming Shi +7 more
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Computational exploration of the reaction mechanism of the Cu+-catalysed synthesis of indoles from N-aryl enaminones [PDF]
Royal Society Open Science, 2016 We have studied the role of Cu+-phenantroline as a catalyst in the cyclization of N-aryl-enaminones using density-functional theory computations. The catalyst was found to bind the substrate upon deprotonation of its eneaminone, and to dramatically ...
Carlos E. P. Bernardo, Pedro J. Silva
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Ni-catalyzed benzylic β-C(sp3)–H bond activation of formamides
Nature Communications, 2022 The development of 3d-metal-catalyzed β-C–H bond activation via 4-membered metallacycles remains an elusive challenge. Here, the authors report a Ni-Al bimetal-catalyzed β-C(sp3)–H bond activation of formamides via 4-membered nickelacycles.
Rong-Hua Wang +7 more
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Co(III) Intermediates in Cobalt-Catalyzed, Bidentate Chelation Assisted C(sp2)-H Functionalizations
Inorganics, 2023 The C-H bond activation and functionalization is a powerful tool that provides efficient access to various organic molecules. The cobalt-catalyzed oxidative C-H bond activation and functionalization has earned enormous interest over the past two decades.
Aleksandrs Cizikovs, Liene Grigorjeva
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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 +4 more
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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 +2 more
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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
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