Neutral Volatile Components of Burley Tobacco

Abstract

Abstract The constituents of the neutral volatiles in air-cured Burley tobacco were studied, and the following 19 substances were newly added to our lists: 1. 6-Methyl-6,9-oxidonon-4-en-2-ol 2. 5-Isopropylnon-3-en-2,8-dioI 3. 5-Isopropylnonan-2,8-diol 4. 3,3,5-Trimethyl-8-isopropyl-4,9-dioxabicyclo-[3.3.1]nonan-2-oI 5. 2-(1-Methyl-4-isopropyl-7,8-dioxabicyclo[3.2.1]-octan-6-yl)propan-2-ol 6. 3-Oxoactinidol 7. 5-Isopropyl-7-(2-methyltetrahydrofur-2-yl)hept-6-en-2-ol 8. O-Methyl acetophenone 9. 1,5,5-Trimethyl-9-oxabicyclo[4.3.0]nonan-3-one 10. 4-(3-Hydroxybutylidene)-3,5,5-trimethylcyclohex-2-en-1-one 11. (1-Methyl-4-isopropyl-7,8-dioxabicyclo[3.2.1]-octan-6-yl)methyl ketone 12. 6,10-Dimethyl-2-(1-methylethenyl)spiro[4.5]dec-6-en-8-one (solavetivone) 13. 5-Isopropyl-7-(2-methyltetrahydrofur-2-yl)hept-6-en-2-one 14. 4-Ethyl-4-methylbutan-4-olide 15. Phthalide 16. Hydroxydihydrobovolide 17. 1,2-Dimethoxy benzene 18. o-Anisidine 19. Methylanthranilate A large number of identified compounds may be viewed as degradation products of carotenoids and thunberganoids. These compounds have a characteristic aroma and are thought to be key flavour components in the essential oils of tobacco. The presence of any labdanoid hydrocarbons or their oxygenated products was not recognized in our Burley tobacco extract. Burley tobacco is thought to be deficient in labdanoid compounds.