Formation of 4-(het)aryl-3H-1,5-benzodiazepine-2-carboxylates from (het)aroylpyruvate esters and o-phenylenediamine. - Khramtsova, Ekaterina E.; Dmitriev, Maksim V.; Maslivets, Andrey N. (Chemistry of Heterocyclic Compounds, 2023)