Algae organic halogen compounds

Cl, Br, or I) or to organic halogen compounds. Most are HEME proteins, but some bromoperoxidases from algae are vanadium-containing enzymes. 

Interest continues in the isolation and structural elucidation of halogenated sesquiterpenoids produced by marine organisms (e.g. algae). Many of these compounds are chamigrane derivatives and new members of this group include prepacifenol epoxide (89)46 from Aplysia californica, elatol (90)47 from Laurencia elata, nidifidienol (91)48 from Laurencia nidifica, and the compounds (92) and (93)49 from... 

The red algae (Rhodophyta) are the most prolific sources of halogenated organics in the marine environment, and this topic was recently reviewed (Fenical, 1975). At least six orders, representing some ten families of red algae are now known to produce a wide variety of structure types from halo-methanes (C,) to halogenated products derived from squalene (C30). Within this group are aromatic and acyclic compounds produced from acetate (poly-ketide) biosynthesis and monoterpenes (Cio), sesqui- (Cu) and diterpenoids (C2o)- The structures of well over 200 compounds have now been firmly established. 

In Figure 6.4 and in the A Word About...Halogenated Organic Compounds from the Sea, halomon, a polyhalogenated terpene produced by red algae, is shown. 

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