A comprehensive review is presented on the constituents of the heartwood from fragrant sandalwood species, including Santalum album, S. spicatum and S. austrocaledonicum, which are important raw materials in the fragrance industry, and S. insulare, a closely related species. Analytical aspects are discussed in detail, both on qualitative and quantitative standpoints, and sensory properties are also reviewed. It is shown that more than 230 constituents have been identified so far in the heartwood of these sandalwood species. These components belong to many different chemical classes and are mainly terpenoids, but some other families are also represented.
A series of eleven β-santalol analogs, including nine new derivatives, was prepared by semisynthesis from natural (-)-(Z)-β-santalol and studied by gas chromatography-olfactometry (GC-O) to characterize their olfactory properties and potencies. These compounds and 45 others selected in the literature were used to build three olfactophores by molecular modelling. Three models were obtained that gather structural and physicochemical constraints that will be useful for further design of new sandalwood odorants.
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