In the field of fragrance chemistry great effort is now devoted to the discovery of new molecules with interesting odour profiles, and to the preparation of known chiral odorant compounds as pure stereomers. The latter investigation is aimed to compare the odour properties of the single isomers, in order to verify whether they elicit different olfactory sensations, and to determine their threshold of perception. It would be possible to use only the olfactorally active isomer of a ...