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Pyrrole studies part 41. Reactivity of 3, 4-diformyl-2, 5-dimethylpyrrole with diaminoalkanes. An unusual formation of 2-azafulvenes

Taheri, Sayed Ali Naghi; Jones, R Alan; Badesha, Santokh Singh; Hania, Majed (Pergamon, 1989)

3,4-Diformyl-2,5-dimethylpyrrole (1) reacts with α,ω-diamino-alkanes, NH2(CH2)nNH2t' to form either the potentially tautomeric 2:2 macrocyclic adduct (7a) ⇌ (8), when n = 2, or the potentially tautomeric 1:1 bicyclic adduct ...