Ammonia-borane as a Catalyst for the Direct Amidation of Carboxylic Acids
作者:P. Veeraraghavan Ramachandran、Henry J. Hamann
DOI:10.1021/acs.orglett.1c00591
日期:2021.4.16
Ammonia-borane serves as an efficient substoichiometric (10%) precatalyst for the direct amidation of both aromatic and aliphatic carboxylicacids. In situ generation of amine-boranes precedes the amidation and, unlike the amidation with stoichiometric amine-boranes, this process is facile with 1 equiv of the acid. This methodology has high functional group tolerance and chromatography-free purification
Electrochemical oxidative transamidation of tertiary amines with <i>N</i>-acyl imides to access amide compounds
作者:Hai Lin、Shengzhang Liu、Qing Li、Qi Zhang、Lingyun Yang、Tao Wang、Jin Luo
DOI:10.1080/00397911.2023.2228947
日期:2023.9.2
Abstract A novel and efficient electrochemical oxidative transamidation of tertiaryamines with N-acyl imides is described. This protocol is environmentally friendly and ease to handle as tertiaryamines are used as surrogates for secondary amines. The C-N bond of tertiaryamines is cleaved, preparing amide compounds in a facile approach with 29 examples in 11–80% yields.