Palladium(<scp>ii</scp>)-catalysed ortho-arylation of N-benzylpiperidines
作者:Peng Wen Tan、Maxwell Haughey、Darren J. Dixon
DOI:10.1039/c5cc00410a
日期:——
Pd(II)-catalysed ortho-arylation of benzylic heterocycles with arylboronic acid pinacol esters (Ar-BPin) via directed C-H bond activation to generate the desired biaryl products is reported. This methodology is efficient and applicable to a wide range of functionalised Ar-BPin and benzylic heterocycles, allowing the direct synthesis of important biaryl motifs in modest to good yield.
Microwave-Assisted Solventless Reaction of Iridium-Catalyzed Alkylation of Amines with Alcohols in the Absence of Base
作者:Weixing Zhang、Xiaochun Dong、Weili Zhao
DOI:10.1021/ol202281h
日期:2011.10.7
Microwave-assisted iridium catalyzed alkylation of amines with alcohols was undertaken under solvent-free and base-free conditions. Such alkylation reactions are green, atom-economic, and effective for mono-, di-, and triaklyation of amines. Good isolated yields were obtained for mono- and dialkylated amines using stoichiometric amounts of amines and alcohols, in the presence of 1 mol % [Cp*IrCl2]2. Reasonable
Hydrosilylative reduction of primary amides to primary amines catalyzed by a terminal [Ni–OH] complex
作者:Pragati Pandey、Jitendra K. Bera
DOI:10.1039/d1cc03537a
日期:——
complex 1, supported by triflamide-functionalized NHC ligands, catalyzes the hydrosilylative reduction of a range of primaryamides into primaryamines in good to excellent yields under base-free conditions with key functional group tolerance. Catalyst 1 is also effective for the reduction of a variety of tertiary and secondary amides. In contrast to literature reports, the reactivity of 1 towards
Mild and Selective Et<sub>2</sub>Zn-Catalyzed Reduction of Tertiary Amides under Hydrosilylation Conditions
作者:Oleksandr O. Kovalenko、Alexey Volkov、Hans Adolfsson
DOI:10.1021/ol503430t
日期:2015.2.6
(Et2Zn) can be used as an efficient and chemoselective catalyst for the reduction of tertiary amides under mild reaction conditions employing cost-effective polymeric silane (PMHS) as the hydride source. Crucial for the catalytic activity was the addition of a substoichiometric amount of lithium chloride to the reaction mixture. A series of amides containingdifferent additional functionalgroups were reduced
Chemoselective Reduction of Tertiary Amides by 1,3-Diphenyldisiloxane (DPDS)
作者:Travis A. Hammerstad、Pooja V. Hegde、Courtney C. Aldrich、Kathleen J. Wang
DOI:10.1055/a-1709-3426
日期:2022.5
A convenient procedure for the chemoselective reduction of tertiaryamides at room temperature in the presence of air and moisture using 1,3-diphenyldisiloxane (DPDS) is developed. The reaction conditions tolerate a significant number of functional groups including esters, nitriles, secondary amides, carbamates, sulfoxides, sulfones, sulfonyl fluorides, halogens, aryl-nitro groups, and arylamines.