
TY  - JOUR
A1  - Coll, JC 
A1  - Wright, AD 
T1  - Tropical Marine Algae. III. New Sesquiterpenes From <I>Laurencia majuscula</I> (Rhodophyta, Rhodophyceae, Ceramiales, Rhodomelaceae)
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1989
VL  - 42
IS  - 9
SP  - 1591
EP  - 1603
KW  - 
UR  - https://doi.org/10.1071/CH9891591 
N2  - The isolation and structural elucidation of new sesquiterpenes from Laurencia  majuscula, collected from Zoe Bay, Hinchinbrook Island, North Queensland, are reported. One collection contained the novel triquinane derivative: (1S*,2S*,3S*,5S*,8S*,9S*)- tricyclo [6.3.0.01.5] undecan-2-ol (3), and four halogenated chamigrene derivatives: the known 1(15)Z compound (4) and the new (1(15)E,2Z,4S,8R,9S)-8,15-dibromochamigra-1(15,2,1112-trien-9-ol (5), the known isoobtusadiene (6) and the new metabolite (1S,2S,4R,8R,9S)-1-chloro-2,8-dibromochamigr-11(12)-en-9-ol (7). A second collection afforded the same range of sesquiterpenes (3)-(7)and an additional tricyclic sesquiterpene related to ( &#916;10)- rhodolaureol (16), namely ( &#916; 11(12))-isorhodolaureol (8). The relationship was confirmed by oxidation of (8) to give the expected non-conjugated enone (15) which rearranged in slightly acidic chloroform to the conjugated enone (17), identical with the oxidation product from rhodolaureol (16). 
ER  -

