Formation of the 5-Azoniafulvene Ion and its Benzo-annellated Analogue from N-Mannich Bases of Pyrrole and Indole

Article abstract of DOI:10.1002/hlca.19850680822

1-Dialkylaminomethylpyrroles are shown to behave in many respects like aminals.Acylation by an acid chloride, for instance, occurs normally at the amine-type N-atom rather than at the pyrrol ring.Spontaneous cleavage of the resulting quaternary acylammoni