Tetrahedron p. 12959 - 12972 (1994)
Update date:2022-08-04
Topics: Scale-up Characterization and Analysis Biological Activity Testing
Gellerman, Gari
Kashman, Yoel
Rudi, Amira
A biomimetic reaction between β,β′-diamenoketones (e.g. kynuramine, kynurenine or o,o′-diaminobenzophenone) and a variety cyclohexanediones and quinones leading to pyrido[2,3,4-kl) acridines is described. The synthesis of several di- and tetrahydro-pyrido[2,3,4-kl)acridine derivatives (7, 10. 12 and 15) as well as benzoderivatives of the marine alkaloids eilatin (1) and ascididemin (2), compounds 28 and 30, has been accomplished. Additionally, the new heterocycles isoeilatin (24), and diazapentacene 19 have also been synthesized. All newly prepared heterocycles have been fully characterized by IR, MS and mainly by NMR spectroscopy. An analogous synthesis has been developed for pyrrolo[2,3,4-kl)acridines, the heterocyclic core of the bioactive marine alkaloids the plakinidines (31 A-C).
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