Cyclization reactions of 3,4-diazaheptatrienyl metal compounds. Pyridines from an anionic analogue of the Fischer indole synthesis: Experiment and theory

Article abstract of DOI:10.1021/jo200487v

Unsymmetrical N,N′-bisalkylidene hydrazines 7a,b, 10a-c and 13, which are accessible in good to excellent yields from hydrazones 6, 9, and 12 and commercially available α,β-unsaturated carbonyl compounds, are converted into 3,4-diazaheptatrienyl anions 14