title: 3-Mercapto-2-methylpentan-1-ol, a new powerful aroma compound.
abstract: 3-Mercapto-2-methylpentan-1-ol was first detected in a complex thermally processed flavor and finally isolated from raw onions. The chemical structure of this new compound was identified by MS and (1)H NMR measurement and synthesis of the proposed structure. Sensory evaluation at different concentrations indicated that the flavor quality is strongly dependent on concentration. At low concentration (0.5 ppb) a pleasant meat broth, sweaty, onion, and leek-like odor can be perceived. On the basis of some isolation experiments and volatiles occurring in raw onions, a formation pathway is proposed. As one intermediate 3-mercapto-2-methylpentanal, another new strong flavor compound, was suggested. The presence of this compound in raw onions was confirmed by synthesis and comparison of MS and chromatographic data.
authors.affiliation: Research Laboratories, DRAGOCO Gerberding & Company AG, D-37601 Holzminden, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Widder
authors.forename: C
authors.initials: C
authors.lastname: Sabater Lüntzel
authors.forename: T
authors.initials: T
authors.lastname: Dittner
authors.forename: W
authors.initials: W
authors.lastname: Pickenhagen
mesh_terms: D005421:Flavoring Agents / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D009812:Odorants; D019697:Onions / Q000737:chemistry*; D000439:Pentanols / Q000032:analysis / Q000302:isolation & purification*; D013438:Sulfhydryl Compounds / Q000032:analysis / Q000302:isolation & purification*; D013649:Taste
chemical_list: D005421:Flavoring Agents; D000439:Pentanols; D013438:Sulfhydryl Compounds; C406689:3-mercapto-2-methylpentan-1-ol