Synthesis and properties of N-cyano derivatives of trideca-, pentadeca-, heptadeca-, and nonadecaazafulvenes.
The title azafulvene analogs were synthesized by the reaction of the corresponding annulenones with N,N′-bis(trimethylsilyl)carbodiimide. The 1H NMR spectra reveal that these compounds show larger tropicity than the corresponding dicyanofulvenes and annulenones.