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Dictymal, a new Seco-fusicoccin type diterpene from the brown alga dictyota dichotoma

✍ Scribed by Makoto Segawa; Nobuyasu Enoki; Mitsuhiko Ikura; Kunio Hikichi; Ryoichi Ishida; Haruhisa Shirahama; Takeshi Matsumoto

Publisher
Elsevier Science
Year
1987
Tongue
French
Weight
115 KB
Volume
28
Category
Article
ISSN
0040-4039

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✦ Synopsis

tified 20th carbon, C-6. Therefore, through the 'H assignments, the carbon skelton was given and the planner structure of ,$, was established. Relative stereochemistries of both rings were determined by the NOES observed with respect to those five pairs of protons, (H-l, H-3), (H-l, Me-19), (H-3, Me-19), (H-8, Me-20) and . Dictymal was considered to be biogenetically derived from epoxydictymene (x)6 which was also found in the same alga. The stereochemistry of dictymal should be represented as formula A7. Ha I C+ I5 Hb k

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