Monoterpenes alicyclic

The aerobic degradation of cycloalkanes has been examined in both monocyclic and polycyclic snb-strates. In all of them, monooxygenation is the first step and this is sometimes accomplished by cytochrome P450 systems. Reviews of the degradation of alicyclic componnds inclnding monoterpenes... 

Crews P, Kho-Wiseman E, Montana P (1978) Halogenated alicyclic monoterpenes from the red algae Plocamium. J Org Chem 43 116-120... 

The halogenated acyclic marine monoterpenes are often considered to be the biogenetic precursors of the alicyclic monoterpenes that are presented in this section. Many of the preceding algae species also contain cyclic monoterpenes. As was the case in preceding sections only newly characterized compounds are numbered and the reader is referred to the first survey for structures of previously isolated compounds (7). 

Reviews of the degradation of alicyclic compounds including monoterpenes have been given by one of the pioneers (Trudgill 1978 1984 1994), and these should be consulted for further details only a bare outline with significant new developments will therefore be given here. 

Symmetric and asymmetric aliphatic, alicyclic and aromatic ethers and ethers with the oxygen atom bound in the ring can be found in foods. Volatile dialkyl ethers are virtually absent from foods, but some are synthesised and used as flavourings, especially for cosmetic purposes. Odour- and taste-active ethers are mainly terpenoid ethers, derived from monoterpenes and sesquiterpenes, and aromatic ethers. 

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