Green Esterification of Carboxylic Acids Promoted bytert‐Butyl Nitrite

Abstract In this work, the green esterification of carboxylic acids promoted by tert‐ butyl nitrite has been well developed. This transformation is compatible with a broad range of substrates and exhibits excellent functional group tolerance. Various drugs and substituted amino acids are applicable to this reaction under near neutral conditions, with good to excellent yields.