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α-bromocuparene and α-isobromocuparene, new bromo compounds from laurencia species

✍ Scribed by Teruaki Suzuki; Minoru Suzuki; Etsuro Kurosawa

Publisher
Elsevier Science
Year
1975
Tongue
French
Weight
119 KB
Volume
16
Category
Article
ISSN
0040-4039

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✦ Synopsis

In recent years, the brominated or non-brominated laurane-type sesquiterpenoids have been isolated from seaweeds of genus Laurencia (l-4). Our further investigations of neutral essential oil from Laurencia species have led to the isolation of two new bromo compounds, a-bromocuparene (I) and a-isobromocuparene (II) from &. glandulifdra Blitzing, and II from &. nipponica Yamada, on the chromatography over neutral alumina with n-hexane. The compounds, I and II, appeared to be the first recognized cuparane-type sesquiterpenoid from seaweeds and the former seems to be the biogenetical precursor of laurene (III) (I), closely related to cuparane-type sesquiterpenoids.

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