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.
Iron‐Catalyzed C
<sub>α</sub>
H Oxidation of Tertiary, Aliphatic Amines to Amides under Mild Conditions
作者:Christopher J. Legacy、Anqi Wang、Brian J. O'Day、Marion H. Emmert
DOI:10.1002/anie.201507738
日期:2015.12
precious metal catalyzed, oxidative protocols to generate such functionalities. However, simple tertiary alkyl amines cannot be used as starting materials in these protocols. The research described herein enables the oxidative synthesis of amides from simple, noncyclic tertiary alkyl amines under synthetically useful, mild conditions through a biologically inspired approach: Fe‐catalyzed CαH functionalization