Aroma compounds formed from 3-methyl-2,4-nonanedione under photooxidative conditions.
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.
Institute of Food Science and Nutrition, Swiss Federal Institute of Technology, Schmelzbergstrasse 9, ETH-Zentrum, CH-8092 Zurich, Switzerland.
Isabelle A
IA
Sigrist
Giuseppe G G
GG
Manzardo
Renato
R
Amadò
D019342:Acetic Acid / Q000032:analysis; D000473:Alkanes / Q000737:chemistry*; D002208:Caproates / Q000032:analysis; D002849:Chromatography, Gas; D003931:Diacetyl / Q000031:analogs & derivatives / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D008027:Light; D009812:Odorants / Q000032:analysis*; D010084:Oxidation-Reduction; D010777:Photochemistry; D012903:Smell; D013055:Spectrophotometry, Infrared; D014835:Volatilization
D000473:Alkanes; D002208:Caproates; C475572:3-methyl-2,4-nonanedione; D003931:Diacetyl; D019342:Acetic Acid