New Carbonyl Compounds in the High-Boiling Fraction of Lavender Oil

Article abstract of DOI:10.1002/hlca.19840670503

The occurrence of a series of new constituents which can be considered as Diels-Alder adducts of methyl vinyl ketone and ocimene (1-4), myrcene (9,10) or β-farnesene (11,12), respectively, was reported.Furthermore, the structures of four isomeric cyclohexene derivatives could be established as adducts 21-24 of (E,Z)- and (E,E)-1,3,5-undecatriene and methyl vinyl ketone.Another series of constituents having the norbornane skeleton represents adducts 25-32 and 33-40 of methylcyclopentadiene and octen-3-one or methyl vinyl ketone, respectively.In accordance with Alder's endo-rule the endo-isomers are preponderant in the natural as well as in the synthetic mixtures.Most of these constituents could also be identified in a lavender absolute as well as in a freshly prepared hexane extract of lavender flowers (Lavandula officinalis CHAIX).