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  • Title: Aroma compounds formed from 3-methyl-2,4-nonanedione under photooxidative conditions.
    Author: Sigrist IA, Manzardo GG, Amadò R.
    Journal: J Agric Food Chem; 2003 May 21; 51(11):3426-8. PubMed ID: 12744678.
    Abstract:
    The behavior of the prominent aroma compound 3-methyl-2,4-nonanedione under photooxidative conditions was investigated in a model experiment. The four well-known aroma compounds 2,3-butanedione, 2,3-octanedione, acetic acid, and caproic acid were identified. The main oxidation product was 3-hydroxy-3-methyl-2,4-nonanedione, an aroma compound with the odor description of rubbery, earthy, and plastic-like (GC-O). Its structure has been tentatively assigned based on mass (GC-MS) and vapor phase infrared spectra (GC-IR). The formal formation pathways are discussed for these compounds, and other origins described in the literature are presented.
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