Taonia atomaria

Taondiol (123) was isolatedfrom the marine alga, Taonia atomaria. The unusual structure possibly arises by the oxidative cyclization of a geranylgeraniol moiety attached to a phenol. In this sense it resembles the triprenyl chromenes such as the siccanochromenes. 

Dictyota dichotoma Ectocarpus siliculosus Fucus serratus F. vesiculosus Laminaria digitata Taonia atomaria... 

De Rosa S, de Gulio A, lodice C, Zavodink N (1994) Sesquiterpenes from the brown alga Taonia atomaria. Phytochemistry 37(5) 1327-1330... 

Taonia atomaria Taondiol (62), isoepitaondiol (63), stypodiol (64), stypoldione (10), sargaqui-none (65), sargaol (66) Antioxidant [159]... 

The same species, DUophus fasciola, led to the isolation of an optically active ether of glycerol and geranylgeraniol. This is currently the only linear diterpene to be characterized in a Dictyotale (Amico et al., 1977), although this compound was later found in two other Dictyotales Taonia lacheana and Taonia atomaria ciliata (Tringali, Piattelli, and Spatafora, 1995). 

Figure 14.15 Biogenetic interconversions of meroditerpenes of Taonia atomaria and Stypopodium zonale (Gonzalez et ai, 1982).

Abatis, D Vagias, C., Galanakis, D., Norris, J.N., Moreau, D., Roussakis, C and Roussis, V. (2005) Atomarianones A and B two cytotoxic meroditerpenes from the brown alga Taonia atomaria. Tetrahedron Lett., 46, 8525-8529. 

Gonzalez, A.G., Darias, (., and Martin, J.D. (1971) TaondioL a new component from Taonia atomaria. Tetrahedron Lett., 12, 2729-2732. 

Tringah, C., Piattehi, M., and Spatafora, C. (1995) Sesquiterpenes and geranylgeranylglycerol from the brown alga Taonia lacheana and Taonia atomaria cUiata their chemotaxonomic significance. Phytochemistry, 40, 827—831. 

Gonzales, A. G., J. Darias, and J. D. Martin Taondiol, a new Component from Taonia atomaria. Tetrahedron Letters 1971, 2729. 

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