Ugi reaction with 5-isocyanoindoles afforded a number of amino acids, beta-lactams, and tetrazoles. The described approach can be applied to combinatorial synthesis of biologically active compounds of the indole series.
Direct <i>N</i>-formylation of nitroarenes with CO<sub>2</sub>
作者:Ni Shen、Shi-Jing Zhai、Chi Wai Cheung、Jun-An Ma
DOI:10.1039/d0cc03098h
日期:——
Direct N-formylation of nitroarenes with CO2 is developed to prepare N-aryl formamides without the need of preforming anilines as conventional substrates.
直接将硝基芳烃与二氧化碳进行N-甲酰化反应,用于制备N-芳基甲酰胺,无需预先形成传统的底物苯胺。
Catalyst-Free Transamidation of Aromatic Amines with Formamide Derivatives and Tertiary Amides with Aliphatic Amines
作者:Jiawen Yin、Jingyu Zhang、Changqun Cai、Guo-Jun Deng、Hang Gong
DOI:10.1021/acs.orglett.8b03542
日期:2019.1.18
A simple catalyst- and promoter-free protocol has been developed for the transamidation of weakly nucleophilic aromatic amines with formamide derivatives and low-reactivity tertiary amides with aliphatic amines. This strategy is advantageous because no catalyst or promoters are needed, no additives are required, separation and purification is easy, and the reaction is scalable. Significantly, this
Herein, we disclose a straightforward approach to access transition-metal-free reductive N-formylation of nitroarenes. This reaction integrates the dual role of rongalite, which acts as a reductant and a C1 building block concurrently. This provides an alternative method for the synthesis of N-aryl formamides from nitroarenes, including the construction of a C–N bond. The utility of this protocol was