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.
Sigrist
Isabelle A
IA
Institute of Food Science and Nutrition, Swiss Federal Institute of Technology, Schmelzbergstrasse 9, ETH-Zentrum, CH-8092 Zurich, Switzerland.
Manzardo
Giuseppe G G
GG
Amadò
Renato
R
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