Mild and Selective Ru-Catalyzed Formylation and Fe-Catalyzed Acylation of Free (N–H) Indoles Using Anilines as the Carbonyl Source
摘要:
C3-selective formylation and acylation of free (N-H) indoles under mild conditions can be achieved by using Ru- and Fe-catalyzed oxidative coupling of free (N-H) indoles with anilines, respectively. Both processes are operationally simple, compatible with a variety of functional groups and generally provide the desired products in good yields. (13)C-labeling experiments unambiguously established that the carbonylic carbon in the formylation products originated from methyl group of N-methyl aniline.
Nickel(II)–N<sup>Λ</sup>N<sup>Λ</sup>O Pincer Type Complex-Catalyzed N-alkylation of Amines with Alcohols via the Hydrogen Autotransfer Reaction
作者:Gunasekaran Balamurugan、Rengan Ramesh、Jan Grzegorz Malecki
DOI:10.1021/acs.joc.0c00530
日期:2020.6.5
A highly sustainable catalytic protocol for the coupling of alcohols and amines for selective monoalkylated amines using Ni(II)–NΛNΛO pincer type complexes through the borrowing hydrogen methodology is described. An array of Ni(II) catalysts (1–3) was synthesized and characterized by various spectral and analytical methods. Furthermore, the distorted square planar geometry of the complexes (1 and 2)
A Highly Active PN<sup>3</sup> Manganese Pincer Complex Performing N-Alkylation of Amines under Mild Conditions
作者:Leonard Homberg、Alexander Roller、Kai C. Hultzsch
DOI:10.1021/acs.orglett.9b00832
日期:2019.5.3
on a nonsymmetric PN3-ligand scaffold for the N-alkylation of amines with alcohols utilizing the borrowing hydrogen methodology is reported. A broad range of anilines and the more challenging aliphatic amines were alkylated with primary and secondary alcohols. Moreover, the combination of low catalyst loadings and mild reaction conditions provides high efficiency for this atom-economic transformation
A conjugated ketone as a catalyst in alcohol amination reactions under transition-metal and hetero-atom free conditions
作者:Xingchao Dai、Xinjiang Cui、Youquan Deng、Feng Shi
DOI:10.1039/c5ra07681a
日期:——
Here, we show the results of a molecular-defined conjugatedketone catalyzed alcohol amination reaction. Under the optimized reaction conditions, the yields to the desired products reached 98%. The reaction mechanism and kinetic study supposed that carbonyl–hydroxyl groups are the catalytically active sites, and the transfer-hydrogenation reactions progress via the recycling of carbonyl and hydroxyl
An ionic 2,6-bis(imidazo[1,2-α]pyridin-2-yl)pyridine-based N^N^N pincer ruthenium(II) complex exhibited high efficiency in the C–N bond formation between amines and alcohols by the “borrowing hydrogen” (BH) or “hydrogen autotransfer” (HA) concept. The synthetic protocol selectively generated monoalkylated amines without formation of tertiary amines during the reaction. The unique selectivity enabled
Use of a Cyclometalated Iridium(III) Complex Containing a N<sup>∧</sup>C<sup>∧</sup>N-Coordinating Terdentate Ligand as a Catalyst for the α-Alkylation of Ketones and <i>N</i>-Alkylation of Amines with Alcohols
作者:Pengcheng Liu、Ran Liang、Lei Lu、Zhentao Yu、Feng Li
DOI:10.1021/acs.joc.6b02758
日期:2017.2.17
A cyclometalated iridium(III) complexcontaining a N∧C∧N-coordinating terdentate ligand [Ir(dpyx-N,C,N)Cl(μ-Cl)]2 was found to be a general and highly effective catalyst for the α-alkylation of ketones and N-alkylation of amines with alcohols. In the presence of catalyst (1 mol % Ir) and base (0.2–0.5 equiv), a variety of desirable products were obtained in good yields under an air atmosphere. Notably