Ci. Chiriac et al., AROMATIC NUCLEOPHILIC-SUBSTITUTION REACTIONS OF 2,4-DINITROBENZENESULFONIC ACID SODIUM-SALT WITH ALIPHATIC AMIDES, Revue Roumaine de Chimie, 40(11-12), 1995, pp. 1197-1200
Aromatic amines can be obtained from 2,4-dinitrobenzenesulfonic acid s
odium-salt and aliphatic amides in excess at 170-180 degrees C, for 6-
7 hours. The steric hindrances have an important role in this reaction
.