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Communication | Regular issue | Vol 14, No. 6, 1980, pp.793-798
Published online, 1st January, 1970
DOI: 10.3987/R-1980-06-0793
Synthesis of Cycloheptadiimidazole Derivatives from a Reactive Troponoid

Hitoshi Takeshita,* Akira Mori, Tomoyoshi Minami, and Hirofumi Kondo

*Instituete of Advanced Material Study, Kyushu University, 6-1, Kasuga-koen, Kasuga 816-8580, Japan


The condensation of 2,4-dichloro-5-methoxytropone with guanidine or with amidines gave 1H-cyclohepta[1,2-d;3,4-d]diimidazoles and 1H-cyclohepta[1,2-d;4,5-d]diimidazoles, which possess the same heterocyclic skeletons with unique metabolites isolated from marine organisms. According to the NMR analysis, the condensations proceeded in the exclusive cine reaction.