19872-52-7Relevant articles and documents
Identification of Character Impact Odorants of Different White Wine Varieties
Guth
, p. 3022 - 3026 (1997)
Application of gas chromatography/olfactometry (GC/O) to the analysis of extracts of Scheurebe and Gewuerztraminer wines yielded 36 and 40 odor-active compounds, respectively. Ethyl 2-methylbutyrate, ethyl isobutyrate, 2-phenylethanol, 3-methylbutanol, 3-hydroxy-4,5-dimethyl-2(5H)-furanone, 3-ethylphenol, and an unknown compound named wine lactone showed high flavor dilution factors in both varieties. Wine lactone was identified as 3a,4,5,7a-tetrahydro-3,6-dimethylbenzofuran-2(3H)-one and was detected for the first time among the volatiles of wine or a food. The compound exhibited an intense coconut, woody, and sweet odor. 4-Mercapto-4-methylpentan-2-one belongs to the most potent odorants only in the variety Scheurebe, whereas cis-rose oxide was a key substance for the overall flavor of Gewuerztraminer wine. GC/O of static headspace samples of both wine varieties revealed butane-2,3-dione, dimethyl sulfide, and dimethyl trisulfide as further potent odorants.
Cassis and Green Tea: Spontaneous Release of Natural Aroma Compounds from β-Alkylthioalkanones
B?ttig, Sarah,Egger, Timothy,Gey, Olga,Bochet, Christian G.,Flachsmann, Felix
, (2021/10/19)
In depth headspace analysis of the slow degradation of β-alkylthioalkanones in ambient air led to the discovery of a novel δ-cleavage pathway, by which β-mercaptoketones are released. Since β-mercaptoketones are potent natural aroma compounds occurring in many fruits, herbs and flowers, the discovery of an enzyme-independent molecular precursor for this class of high-impact molecules is of practical importance. Moreover, the formation of β-diketones and aldehydes by concomitant oxidation at the α-sulfur-position enhances the versatility of this class of aroma precursors. A mechanistic model is proposed which suggests that the oxidative degradation occurs through a novel Pummerer-type rearrangement of initially formed persulfoxides.
A centrosymmetrical di-thiolato-bridged dinuclear nickel(II) compound; Bis-μ-S-(7-amino-2,4-dimethyl-5-azahept-4-ene-2-thiolato)dinickel(II) perchlorate
Curtis, Neil F.,Gladhikh, Olga P.,Heath, Sarah L.,Morgan, Keith R.
, p. 49 - 53 (2007/10/03)
The title compound, formed by reaction of 4-mercapto-4-methylpentan-2-one with bis(ethane-1,2-diamine)nickel(II) perchlorate, has a centrosymmetrical dinuclear cation. Each singlet ground-state nickel(II) ion is in tetrahedrally twisted square-planar coordination by the primary amine and imine nitrogen atoms and the thiolato sulfur atom of one molecule of 7-amino-2,4-dimethyl-5-azahept-4-ene-2-thiolate (adet-), and the sulfur atom of another molecule, with the sulfur atoms of two ligands forming a planar Ni2S2 bridging group {[Ni2-μ-(adet)2] (ClO4)2, C16H34Cl2N4Ni2O 8S2, Mr 662 · 9, monoclinic, P 21/cr a 8·267(1), b 9·952(1), c 16·234(2) A, β 103·010(2)°, RI, 0·033 for 2531 reflections}.
