Abbiati G, Doda A, Dell'Acqua M, Pirovano V, Facoetti D, Rizzato S, Rossi E. Synthesis of two unnatural oxygenated aaptaminoids.
J Org Chem 2012;
77:10461-7. [PMID:
23088773 DOI:
10.1021/jo3020598]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two unprecedented oxygenated aaptaminoids have been synthesized starting from cheap and easily available 2,3-dihydroxybenzoic acid with the satisfactory overall yields of 31% and 34%. The key step of the procedure is the divergent thermic 5-exodig vs base-promoted 6-endodig cyclization of a 5-alkynylquinolinone derivative.
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