Rhodium(III)-Catalyzed Hydroamination of Aromatic Terminal Alkynes with Anilines
作者:Elumalai Kumaran、Weng Kee Leong
DOI:10.1021/om201134j
日期:2012.2.13
The dinuclear Rh(III) species [Cp*RhCl2]2 catalyzes the hydroamination reaction between an aromatic terminalalkyne (ArCCH) and an aniline (Ar′NH2), in the presence of a salt additive, to afford the ketimine Ar′N═C(Me)(Ar). A reaction pathway has been proposed on the basis of experimental and computational studies.
A Ferrocene‐Based Phosphane/Borane Frustrated Lewis Pair for Asymmetric Imine Reduction
作者:Ke‐Yin Ye、Xiaowu Wang、Constantin G. Daniliuc、Gerald Kehr、Gerhard Erker
DOI:10.1002/ejic.201600834
日期:2017.1.10
The α-phosphanylferrocenecarbaldehyde (pS)-1 was converted into the β-styryl derivative (pS)-4 by Wittig–Horner olefination. Subsequent hydroboration with Piers' borane [HB(C6F5)2] followed by H2 splitting and crystallization gave the phosphonium/hydridoborate product (pS,R)-5, which was used as a frustrated Lewis pair catalyst for the asymmetric hydrogenation of a series of imines (up to 69 % ee)
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-catalyzed transfer hydrogenations of imines with Hantzsch esters
作者:Qiaotian Wang、Jingjing Chen、Xiangqing Feng、Haifeng Du
DOI:10.1039/c8ob00023a
日期:——
Highly efficient transfer hydrogenations of imines were realized with as low as 0.1 mol% of B(C6F5)3 by using Hantzsch esters as a hydrogen source, furnishing a variety of amines in 80–99% yields. For the asymmetric transfer hydrogenations, up to 38% ee was obtained with chiral diene-derived boron Lewis acids.
通过使用Hantzsch酯作为氢源,以低至0.1 mol%的B(C 6 F 5)3实现了亚胺的高效转移加氢,以80-99%的产率提供了多种胺。对于不对称转移氢化,使用手性二烯衍生的硼路易斯酸可获得高达38%的ee。
<b>Decarboxylative Amination with Nitroarenes via Synergistic Catalysis</b><sup><b>†</b></sup>
In this paper, we have developed a decarboxylative amination of carboxylic acids with nitroarenes for the synthesis of secondary amines. The protocol is performed at mild conditions without the use of noble metals as catalysts. A widerange of structurally diverse secondary amines could be obtained in good yields (up to 94%) with good functional group tolerance. This transformation shows good to excellent
Hydrogenation and Transfer Hydrogenation Promoted by Tethered Ru−S Complexes: From Cooperative Dihydrogen Activation to Hydride Abstraction/Proton Release from Dihydrogen Surrogates
well as with a representative Hantzsch ester dihydrogen surrogate, are reported. Both processes are catalyzed by tethered Ru−S complexes but differ in the activation mode of the dihydrogen source: cooperative activation of the H−H bond at the Ru−S bond leads to the corresponding Ru−H complex and protonation of the sulfur atom, whereas the same cationic Ru−S catalyst abstracts a hydride from a donor‐substituted