Geranyl-linalool is a naturally occurring organic compound classified as a diterpenoid with the molecular formula . This is a compound found in various plants and serves as an important intermediate in the biosynthesis of several biologically active compounds.
Chemical structure Geranyl-linalool is classified as an acyclic alyphatic diterpenoid polyalkene alcohol. The compound includes four isoprene units arranged in a head-to-tail fashion, characteristic of diterpenes.
Natural occurrence Geranyllinalool is found in various plant species, including: tobacco (Nicotiana tabacum) where it was first identified, ginkgo (Ginkgo biloba), various orchid species, some fungi and marine organisms. The compound is typically present in trace amounts and is often detected through careful phytochemical analysis.
Biosynthesis Geranyl-linalool is biosynthesized via the plastidial MEP pathway. The compound is formed from geranylgeranyl diphosphate (GGPP) through the action of specific terpene syntheses. The compound serves as a precursor to various cyclic diterpenes and other biologically active compounds in plants. In tobacco, geranyl-linalool is part of the cembranoid diterpene pathway and can be further metabolized into various oxidation products.
Physcal properties The compound forms a colorless to pale yellow liquid which is insoluble in water, but soluble in organic solvents.
Uses Geranyl-linalool is commonly used as a fragrance. Its aroma is mild and described as "floral, rose, balsamic". It also demonstrate insecticidal property to xylophagous insects and pine wood. The compound has also been studied for its influence on pyocyanin and Pseudomonas quinolone signal production by Pseudomonas aeruginosa. Geranyl-linalool can also be used as a precursor in the synthesis of teprenone by reacting with acetylated Meldrum's acid.
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