The Synthesis of Dialkylaminonitrile Derivatives of 2-Formylbenzoic Acid by the Strecker Reaction in an Aqueous Medium

3-Amino-4-(diphenylamino)-1H-2-benzopyran-1-one

Various synthetic methodologies to obtain 3,4-diaminoisocumarin nucleus have been reported and described. However, mechanistic analysis based on experimental evidence is lacking. Herein, we report the synthesis of the novel 3-amino-4-(diphenylamino)-1H-2-benzopyran-1-one using a two-step methodology with a new mechanistic proposal to explain the formation of the latter based on previously reported precursors and the established conditions. This compound was afforded in 80% yield.