By a reaction of inodolizine derivatives (9) with tetrachlorocyclopropene (TCCP) in the presence of KOH, 4, 5-bis(2-phenyl-3-indolizinyl)-3H-cycl[3.3.2]azin-3-ones (12) were obtained. 1, 3, 5, 5a-Tetrahydro-2, 3, 5-triphenyl-4H-cycl[3.3.2]azin-4-ones (14) and 2, 3, 5-triphenyl-4H-cycl[3.3.2]azin-4-ones (15) were prepared by a reaction of 9 and α, α'-dibromodibenzylketone (13) in the presence of Fe2(CO)9 or Cu-NaI. The 1H-nuclear magnetic resonance spectral data (CF3COOH) of 15a may be interpreted in terms of the aromatic charactor.
