Iron-Catalyzed <i>Ortho</i> C–H Methylation of Aromatics Bearing a Simple Carbonyl Group with Methylaluminum and Tridentate Phosphine Ligand
作者:Rui Shang、Laurean Ilies、Eiichi Nakamura
DOI:10.1021/jacs.6b06908
日期:2016.8.17
(Me2N-TP), that allows us to convert an ortho C-H bond to a C-CH3 bond in aromatics and heteroaromatics bearing simple carbonyl groups under mild oxidative conditions. The reaction is powerful enough to methylate all four ortho C-H bonds in benzophenone. The reaction tolerates a variety of functionalgroups, such as boronic ester, halide, sulfide, heterocycles, and enolizable ketones.
A General and Highly Selective Cobalt-Catalyzed Hydrogenation of N-Heteroarenes under Mild Reaction Conditions
作者:Rosa Adam、Jose R. Cabrero-Antonino、Anke Spannenberg、Kathrin Junge、Ralf Jackstell、Matthias Beller
DOI:10.1002/anie.201612290
日期:2017.3.13
Herein, a general and efficientmethod for the homogeneous cobalt‐catalyzed hydrogenation of N‐heterocycles, under mild reaction conditions, is reported. Key to success is the use of the tetradentate ligand tris(2‐(diphenylphosphino)phenyl)phosphine). This non‐noble metal catalyst system allows the selectivehydrogenation of heteroarenes in the presence of a broad range of other sensitive reducible
A Molecularly Defined Iron-Catalyst for the Selective Hydrogenation of α,β-Unsaturated Aldehydes
作者:Gerrit Wienhöfer、Felix A. Westerhaus、Kathrin Junge、Ralf Ludwig、Matthias Beller
DOI:10.1002/chem.201300660
日期:2013.6.10
A selectiveiron‐based catalyst system for the hydrogenation of α,β‐unsaturated aldehydes to allylic alcohols is presented. Applying the defined iron–tetraphos complex [FeF(L)][BF4] (L=P(PhPPh2)3) in the presence of trifluoroacetic acid a broad range of aldehydes are reduced in high yields using low catalyst loadings (0.05–1 mol %). Excellent chemoselectivity for the reduction of aldehydes in the presence
Hydrogenation of nitroarenes using defined iron–phosphine catalysts
作者:Gerrit Wienhöfer、Mario Baseda-Krüger、Carolin Ziebart、Felix A. Westerhaus、Wolfgang Baumann、Ralf Jackstell、Kathrin Junge、Matthias Beller
DOI:10.1039/c3cc42983k
日期:——
A novel iron-catalyzed hydrogenation of nitroarenes to the corresponding amines is reported. An in situ combination of Fe(BF4)2·6H2O and phosphine allows for highly selective hydrogenation of a broad range of aromatic and nitroarenes tolerating different functional groups.
system for the reduction of CO(2) and bicarbonates is presented. In the presence of the iron(II)-fluoro-tris(2-(diphenylphosphino)phenyl)phosphino]tetrafluoroborate complex 3, the hydrogenation of bicarbonates proceeds in good yields with high catalyst productivity and activity (TON > 7500, TOF > 750). High-pressure NMR studies of the hydrogenation of carbondioxide demonstrate that the corresponding