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Halogenated monoterpenes from plocamium costatum and their biological activity1
1Institute for Pharmaceutical Biology, Technical University Braunschweig, Mendelssohnstrasse 1, D 38106 Braunschweig, Germany, and Centre for Marine Biofouling & Bio-Innovation, University of New South Wales, Sydney, New South Wales 2052, Aus.
Abstract:
From the dichloromethane solubles of the temperate red alga Plocamium costatum, one new [1,4-dibromo-2,3,6-trichloro-3, 7-dimethyl-7-octene] (1) and three previously reported polyhalogenated monoterpenes (2-4), and the known phytol derivative 3,7,11,15-tetramethylhexadec-1-en-3-ol (1-phyten-3-ol, 5) were isolated. The structure of 1 was deduced from its spectroscopic data. For compound 3, complete 1H and 13C NMR data are reported for the first time. The CH2Cl2 extract and compounds 3 and 5 deterred settlement of barnacle larvae, suggesting a potential ecological role of these isolates.