Oxygenated monoterpenoid

Enantiomeric compounds differ from one another only in two aspects The chiroptical characteristics (optical rotation) and the speed of their reaction with chiral molecules. The human olfactory organ is also capable of distinguishing chiral molecules. The odor quality and potency of enantiomeric compounds may show considerable differences. Thus, distinct differentiation in odor perception could be observed in the pairs of enantiomeric oxygenated monoterpenoid odorants. " However, the... 

Oxygenated monoterpenoids (alcohols, aldehydes, ketones and other oxygen-containing compounds) are flavour determining components of essential oils and more important from practical aspects than monoterpenic hydrocarbons. 

The number of oxygenated monoterpenoids is much higher than corresponding hydrocarbons but contrary to a hydrocarbon fraction in the oxygenated fraction of given essential oils usually only one or a few... 

Further oxygenated monoterpenoids have been reported from pine beetles. 

Administered via steam inhalation to rabbits, 1,8-cineole in concentrations that produced a barely detectable scent (1-9 mg/kg) augmented the volume output of respiratory tract uid from 9.5% to 45.3% (Boyd and Sheppard, 1971), an effect that they described as mucotropic. Interestingly, in the same experiment, fenchone at 9 mg/kg increased the output by 186.2%, thus con rming the strong effects of some ketones in this regard. Also using rabbits, Zanker and Blumel (1983) found that oxygenated monoterpenoids reduced mucus deposition and partially recovered the activity of ciliated epithelium. 

Acyclic oxygenated monoterpenoids, e.g., nerol, geraniol, linalool, and cyclohexanoid congeners, e.g., a-terpineol, 1,8-cineole, camphor... 

Figure 3.14 Outline biosynthesis of the iridoid family of oxygenated monoterpenoids.

Carvone is an oxygenated monoterpenoid found in spearmint oil, caraway and dill seed oils, mandarin peel, and gingergrass oil (Craveiro et al., 1981). It exists as a... 

Smedman, L. A., E. Zavarin, and R. Teranishi Composition of Oxygenated Monoterpenoids and Sesquiterpenoid Hydrocarbons from the Cortical Oleoresin. of Abies Magnifica A. Murr. Phytochem. 8, 1457 (1969). 

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