Direct Methylation of Amines with Carbon Dioxide and Molecular Hydrogen using Supported Gold Catalysts
作者:Xian-Long Du、Gao Tang、Hong-Liang Bao、Zheng Jiang、Xin-Hua Zhong、Dang Sheng Su、Jian-Qiang Wang
DOI:10.1002/cssc.201500486
日期:2015.10
Furthermore, the catalyst is tolerant toward a variety of amines, which includes aromatic, aliphatic, secondary, and primary amines. Preliminary mechanistic studies suggest that the N‐alkyl formamide might be an intermediate in the N‐methylation of amine process. Moreover, through a one‐pot process, it is possible to convert primary amines, aldehydes, and CO2 into unsymmetrical tertiary amines with H2 as
胺与CO 2和H 2的N-甲基化是生物活性化合物和化学中间体合成中的重要步骤。据报道该甲基化反应的第一种非均相Au催化剂具有良好或优异的产率。基于表面Au原子的平均周转频率(TOF)为45 h -1,这是有报道的苯胺与CO 2和H 2甲基化的最高TOF值。此外,该催化剂对多种胺具有耐受性,包括芳族,脂族,仲和伯胺。初步的力学研究表明,N烷基甲酰胺可能是胺过程中甲基化的中间体。此外,通过一锅法,可以在Au催化剂存在下,以H 2为还原剂,将伯胺,醛和CO 2转化为不对称叔胺。