Results 71 to 80 of about 25,864 (264)
Nature Communications, 2022 Aromatic compounds can be prepared via dehydrogenation of cyclic compounds. Here the authors report the dehydroaromatization of endocyclic and exocyclic olefins via chain-walking isomerization and transfer-dehydrogenation catalyzed by palladium N ...
Weihao Chen +4 more
doaj +1 more source
N‑Heterocyclic Carbene Nitric Oxide Radicals
, 2015 N-Heterocyclic carbene-stabilized nitric oxide radicals were prepared by direct addition of nitric oxide to two N-heterocyclic carbenes in solution phase. The compounds were fully characterized by X-ray crystallography and EPR. The nitric oxide moiety in
Kimoon Kim (1563838) +10 more
core +2 more sources
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
Nature Communications, 2021 Catalyst deactivation caused by the aggregation of active metal species poses great challenges for supported metal catalyzed solid-liquid reactions. Here, the authors develop a hypercrosslinked polymer integrated with N-heterocyclic carbene (NHC) as ...
Chengtao Yue +5 more
doaj +1 more source
Iridium phosphine abnormal N-heterocyclic carbene complexes in catalytic hydrogen transfer reactions
, 2011 Iridium phosphine abnormal N-heterocyclic carbene complexes in catalytic hydrogen transfer reactionsSeveral iridium complexes bearing chelating abnormal N-heterocyclic carbenes (NHCs) are shown to be active catalysts for transfer hydrogenation of ketones
李兴伟 +4 more
core +1 more source
Acta Crystallographica Section E: Crystallographic Communications, 2018 The crystal structure of the title compound, [Ni(C25H28N4)(C8H12)]·C4H8O or (MesNHC2Me)Ni(COD), which contains a bidentate N-heterocyclic carbene (NHC) ligand with mesityl aryl groups is reported.
Carlos D. Yamamoto +2 more
doaj +1 more source
Flexible cycloalkyl-substituted N-heterocyclic carbenes
Dalton Transactions, 2010 The use of two metal systems cis-Pt(NHC)(2)Me(2) and cis-Ir(NHC)(CO)(2)Cl help to highlight the flexibility of a series of cycloalkyl-substituted N-heterocyclic carbene ligands (ICy, ICy(7), ICy(8), ICy(12)). Bond dissociation enthalpies of several N-heterocyclic carbenes (NHCs) in cis-Pt(NHC)(2)Me(2) are estimated.
Fortman +3 more
openaire +2 more sources
Xanthines are purine derivatives predominantly found in plants. Xanthines include compounds such as caffeine, theophylline, and theobromine and exhibit a variety of pharmacological properties, demonstrating efficacy in treating neurodegenerative ...
Ana, Petronilho +3 more
core +1 more source
NHC-Ni(II)-catalyzed cyclopropene-isocyanide [5 + 1] benzannulation
Nature Communications, 2022 The direct addition of isocyanides to cyclopropenes is challenging. Here, the authors report a catalytic cyclopropene-isocyanide [5 + 1] benzannulation catalyzed by an (N-heterocyclic carbene)Ni(II) complex; this method enables the preparation of fused ...
Jian–Qiang Huang +3 more
doaj +1 more source
Photogenerated Oxetanes as a Gateway to Uphill Cyclopropanation
Angewandte Chemie International Edition, EarlyView.An atom‐economical route to densely functionalized cyclopropanes from furans and photochemically activated aldehydes is enabled by a unique oxetane‐to‐cyclopropane rearrangement. These cyclopropanes can be used to access complex bioactive scaffolds and serve as a platform for asymmetric cyclopropane synthesis.
Tim Köglmeier +2 more
wiley +1 more source