Manganese-Mediated Reductive Transamidation of Tertiary Amides with Nitroarenes
作者:Chi Wai Cheung、Jun-An Ma、Xile Hu
DOI:10.1021/jacs.8b03739
日期:2018.6.6
an important class of organic compounds, which have widespread industrial applications. Transamidation of amides is a convenient method to generate new amides from existing ones. Tertiary amides, however, are challenging substrates for transamidation. Here we describe an unconventional approach to the transamidation of tertiary amides using nitroarenes as the nitrogen source under reductive conditions
Reverse Polarity Reductive Functionalization of Tertiary Amides via a Dual Iridium-Catalyzed Hydrosilylation and Single Electron Transfer Strategy
作者:Tatiana Rogova、Pablo Gabriel、Stamatia Zavitsanou、Jamie A. Leitch、Fernanda Duarte、Darren J. Dixon
DOI:10.1021/acscatal.0c03089
日期:2020.10.2
amide buildingblocks has been developed. By combining Vaska’s complex-catalyzed tertiary amide reductive activation and photochemical single electron reduction into a streamlined tandem process, metastable hemiaminal intermediates were successfully transformed into nucleophilic α-amino free radical species. This umpolung approach to such reactive intermediates was exemplified through coupling with
Abstract An efficient and facile process has been developed for the regioselective C5 nitration of the N-protected indolines using ferric nitrate as the nitrating reagents. The reaction proceeded smoothly in moderate to excellent yields with high efficiency and broad substrate scope undermildconditions. In addition, the synthesized nitration products can be further transformed to 5-nitroindolines
摘要 使用硝酸铁作为硝化试剂,开发了一种高效、简便的方法,用于 N 保护的二氢吲哚的区域选择性 C5 硝化。该反应在温和条件下以中等至优异的产率、高效和广泛的底物范围顺利进行。此外,合成的硝化产物可以进一步转化为5-硝基二氢吲哚和C5-硝基吲哚衍生物。该方法操作简单、高效,在工业生产中具有潜在的应用价值。图形概要
Latent Brønsted Base Solvent-Assisted Amide Formation from Amines and Acid Chlorides
作者:Rikuto Otsuka、Kazuo Maruhashi、Tomohiko Ohwada
DOI:10.1055/s-0037-1609342
日期:2018.5
Weakly basic amines, including even neutral amines such as nitroaniline and aminocarboxylic acids, react with acid chlorides very efficiently in N,N-dimethylacetamide (DMAC), without addition of a base, to give the corresponding amides in high yields. The role of DMAC and related solvents as latent Brønsted bases was studied in these amidation reactions. Less basic amines, such as aromatic amines, reacted