Halogenated Monoterpenes Having a Cyclohexadienone from the Red Alga Portieria Hornemanni

Five new ochtodane class monoterpenes have been isolated from two collections of the red alga Portieria hornemanni and their structures elucidated by spectroscopic analysis. These compounds contained 4,4‐dimethylcyclohexa‐2,5‐dienone in common and differed in the C2 side chain structure. Some of the...

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Bibliographic Details
Published in:Journal of the Chinese Chemical Society (Taipei) 2003-02, Vol.50 (1), p.167-170
Main Authors: Kuniyoshi, Masayuki, Oshiro, Naomasa, Miono, Takayuki, Higa, Tatsuo
Format: Article
Language:English
Subjects:
Aromatization mechanism
Cyclohexadienone
Cytotoxin
Monoterpene
Portieria hornemanni
Red alga
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Summary:Five new ochtodane class monoterpenes have been isolated from two collections of the red alga Portieria hornemanni and their structures elucidated by spectroscopic analysis. These compounds contained 4,4‐dimethylcyclohexa‐2,5‐dienone in common and differed in the C2 side chain structure. Some of them showed mild cytotoxicity. Also discussed is the mechanism of the transformation of 2‐chloro‐1‐hydroxyochtoda‐3(8),5‐dien‐4‐one, a related labile compound reported previously, into 4,5‐dimethylbenzo[b]furan.
ISSN:0009-4536
2192-6549
DOI:10.1002/jccs.200300023