Azo‐Bridged Cesium Salt of Phenolate/Triazolide as an Unprecedented Carboxylation Catalyst for 1,3‐Disubtituted Ureas from CO₂ and Amines

Abstract

From the perspectives of environmental and economic benefits, the catalytic fixation of CO 2 is considered one of the best pathways to mitigate the CO 2 concentration. Towards this end, several extensive efforts to convert CO 2 into commodity chemicals and fuels have been undertaken over past decades. [4] For example, several useful molecules including methanol, carbonates, heterocycles, carboxylated compounds, etc., could be synthesized from the catalytic valorization of CO 2. [5-7] Although being considered as a cheap and abundant source of carbon, the thermodynamic inertness and kinetic limitation of carbon dioxide has still remained an impediment to the activation of this molecule. [8] 1,3-Disubstituted ureas (DSUs) are an important class of carbonyl compounds, which are widely used as intermediates in the production of fine chemicals, agrochemicals, and bioactive molecules. [9-12] Besides, DSUs can be readily transformed to corre