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Synthesis and Properties of N-Cyanodimethyltetradehydro-trideca-, -pentadeca-, -heptadeca-, and -nonadeca-azafulvenes, and Benzanellated N-Cyanotridecaazafulvene Derivatives. -Title compounds such as (III)-(V) are prepared by a method reported previously for the conversion of the carbonyl group of quinones into a cyanoimino group. -(OJIMA, J.; HIGUCHI, H.; SATA, Y.; YAMAMOTO, H.; KOIZUMI, T.; IYODA, M.; YAMAMOTO, G.; J. Chem. Soc., Perkin Trans. I (1991) 9, 2111-2120; Dep.

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.

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