Results 31 to 40 of about 23,038 (267)
, 2022 A recently discovered heme-dependent enzyme TyrH offers a green approach for functionalizing the high-strength C-H and C-F bonds in aromatic compounds.
Gary, Black +5 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
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 +2 more
openaire +3 more sources
, 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 +1 more source
Csp3‒H Bond Activation Mediated by a Pd(II) Complex under Mild Conditions
, 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 +1 more source
Silver-Mediated Direct sp(3) C-H Bond Functionalization
, 2015 Direct sp(3) C-H bond functionalization is an efficient, straightforward, and powerful method to construct new C-X (X = C, N, F, S) bonds from nonfunctionalized aliphatic motif of organic molecules, which has been used in late-stage modification of ...
Zhou, Taigang +3 more
core +1 more source
Synthesis of C70-fragment buckybowls bearing alkoxy substituents
Beilstein Journal of Organic Chemistry, 2020 Buckybowls bearing a C70 fragment having two alkoxy groups were synthesized and their structural and optical properties were investigated by single crystal X-ray analysis and UV–vis spectroscopy. In the synthesis of dioxole derivative 5b, the regioisomer
Yumi Yakiyama +2 more
doaj +1 more source
Enantioselective C–P Bond Formation through C(sp3)–H Functionalization
, 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
Cobalt-catalyzed directed C–H alkenylation of pivalophenone N–H imine with alkenyl phosphates
Beilstein Journal of Organic Chemistry, 2018 A cobalt–N-heterocyclic carbene (NHC) catalyst efficiently promotes an ortho C–H alkenylation reaction of pivalophenone N–H imine with an alkenyl phosphate. The reaction tolerates various substituted pivalophenone N–H imines as well as cyclic and acyclic
Wengang Xu, Naohiko Yoshikai
doaj +1 more source
Selective Activation of Methane C-H Bond in the Presence of Methanol
, 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