A Mild Reductant NHC‐ligated Borane for N‑Formylation of Amines with CO2 under Ambient Conditions

A convenient and efficient metal‐free protocol has been reported for formylation of various amines with carbon dioxide. This reaction could proceed under ambient conditions and show a broad substrate scope, encompassing primary amines, secondary amines, chiral amino acid esters and bioactive molecules. Furthermore, this method offers several advantages, including the preservation of substrate chirality, ease of separation and purification and the suitability of formic acid and formate salts as reactants in this reaction.