Reaction of 3,4-Diformyl-2,5-dimethylpyrrole with 1,2(substituted)diphenyl-1,2-diaminoethanes
3,4-Diformyl-2,5-dimethylpyrrole (1) reacts with 1,2-diphenyl-1,2-diamine derivatives to form the potentially tautomeric 2:2 macrocyclic adduct (1)=(1). 1H and 13C n.m.r. spectral data along with acidity measurements indicate that the 2-azafulvene structure (7) is predominant for all adducts.
Turk. J. Chem., 22, (1998), 137-142. Full text: pdf Other articles published in the same issue: Turk. J. Chem.,vol.22,iss.2.