Yoshito Tobe, Hironobu Nakanishi, Motohiro Sonoda, Tomonari Wakabayashi and Yohji Achiba
(1,3,5)Pyridinophanes having [4.3.2]propellatriene units were synthesized as precursors to macrocyclic polyyne C58H4N2; diazafullerene anion C58N2– was detected in the laser desorption mass spectrum of the pyridinophanes.