New compounds from the essential oil of Vetiveria nigritana roots from Mali

• Published in: Flavour and fragrance journal 2007-11, Vol.22 (6), p.488-493
• Main Authors: Champagnat, Pascal, Bessière, Jean-Marie, Chezal, Jean-Michel, Chalchat, Jean-Claude, Carnat, André-Paul
• Format: Article
• Language: English
• Subjects: 2-epi-prezizanoic acid; Applied sciences; Biological and medical sciences; cedren-15-oic acid; Chemical constitution; Chemical industry and chemicals; dehydronigritene; essential oil; Essential oils, perfumes; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; nigritene; Plant physiology and development; Poaceae; Vetiveria; Vetiveria nigritana; Washing products. Cosmetics and toiletries. Perfumes
• ISSN: 0882-5734; 1099-1026
• DOI: 10.1002/ffj.1828

Essential oil from roots (2% w/w) of Vetiveria nigritana (Benth.) Stapf (Poaceae) from Mali was analysed by GC-MS. Among the components, four new compounds were isolated from the oil and identified by combination of EI-MS and NMR data; they were two norsesquiterpene hydrocarbons, 9,9-dimethyl-8-methylenetricyclo[5.2.2.0³,⁷]undec-3-ene (dehydronigritene 1) and 8,9,9-trimethyltricyclo[5.2.2.0³,⁷]undec-3-ene (nigritene 2), and two sesquiterpene acids : 2,6,6-trimethyltricyclo[5.3.1.0¹,⁵]undec-8-ene-8-carboxylic acid (cedren-15-oic acid 3) and 6,6-dimethyl-7-methylenetricyclo[6.2.1.0¹,⁵]undecane-2-carboxylic acid (2-epi-prezizanoic acid 4). The percentages in oil of compounds 1, 2, 3 and 4 were 0.9%, 2.2%, 7.5% and 15%, respectively, of the total amount of components. Copyright © 2007 John Wiley & Sons, Ltd.