We have demonstrated that the unsupported nanoporous gold (AuNPore) was a green and highlyefficient heterogeneous catalyst for the reduction of amides to aminesusinghydrosilanes as reductants. A variety of tertiary amides with a broad functional groups were reduced to the corresponding tertiary amines in the presence of 2 mol% of AuNPore and PheMe2SiH or (Me2SiH)2O under mild conditions. AuNPore
The use of tertiaryamines as surrogates for secondary amines has prominent advantages in terms of stabilization and ease of handling. A Ni-catalyzed transamidation of N-acylsaccharins with tertiary aromatic amines is reported. By using tert-butyl hydroperoxide as the terminal oxidant, this reaction permits selective cleavage of the C(sp3)–N bonds of unsymmetrical tertiary aromatic amines depending
使用叔胺作为仲胺的替代品在稳定性和易于处理方面具有突出的优势。报道了 N-酰基糖精与叔芳香胺的 Ni 催化转酰胺作用。通过使用叔丁基过氧化氢作为末端氧化剂,该反应允许根据烷基取代基的大小选择性裂解不对称叔芳胺的 C(sp3)-N 键。
Palladium-Catalyzed Aminocarbonylation of Aryl Iodides with Amides and<i>N</i>-alkyl Anilines
A novel and efficient palladium-catalyzed aminocarbonylation of aryliodides with amides and N-alkyl anilines has been developed. The reaction tolerates a wide range of functional groups and is a reliable method for the rapid synthesis of a variety of valuable imides and tertiary benzanilides under an atmospheric pressure of CO.
An unprecedented N-demethylation of N-methyl amides has been developed by use of N-fluorobenzenesulfonimide as an oxidant with the aid of a copper catalyst. The conversion of amides to carbinolamines involves successive single-electron transfer, hydrogen-atom transfer, and hydrolysis, and is accompanied by formation of N-(phenylsulfonyl)benzenesulfonamide. Carbinolamines spontaneously decompose to
facile route for CO-based carbonylation of aryl iodides with amines to synthesize amides has been established by using SiO2 supported Pd(0) as the catalyst in a mild basic environment (K2CO3). This ligand-free heterogeneous reaction model can afford amide products in good to excellent yields (up to 99%) under atmospheric COpressure and moderate temperature. The supported catalyst also displayed a broad
通过在温和的碱性环境(K 2 CO 3)中使用SiO 2负载的Pd(0)作为催化剂,建立了一种基于胺的基于CO的芳基碘化物与胺的CO基羰基化反应的有效而便捷的途径。这种无配体的非均相反应模型可以在大气压CO压力和中等温度下提供酰胺产品,收率良好至优异(高达99%)。负载型催化剂还显示出广泛的底物范围,良好的官能团耐受性和良好的可回收性。这些特征使得所提供的羰基化方法可持续并且可用于有机合成中。