Abstract Catalytic synthesis of 2, 4-dinitrophenylhydrazones formed in the aqueous reaction mixture of aliphatic and aromatic carbonyl derivatives with 2, 4-dinitrophenylhydrazine in the presence of carbonic acid protons under pressure of the CO 2-H 2 O a steam-gas mixture was studied for the example of synthesis of p-quinone-mono-2, 4-dinitrophenylhydrazone.
