Azuleno [4,5,6-cd] phenalene; A Novel Nonalternant Isomer of Benzo [a] pyrene


  • The Chemistry of Phenalenium Systems, Part 26.—Part 25: O. Hara, K. Tanaka, K. Yamamoto, T. Nakazawa, I. Murata, Tetrahedron Lett. 1977, 2435.


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An insight into the mode of action of the carcinogen benzo [a] pyrene(1) could come from the study of analogous compounds. Azulenophenalene (2), which has now been synthesized, is expected to have a considerable biological activity.