50746-09-3Relevant academic research and scientific papers
Identification of cysteinylated aroma precursors of certain volatile thiols in passion fruit juice
Tominaga, Takatoshi,Dubourdieu, Denis
, p. 2874 - 2876 (2000)
Together with 3-mercaptohexan-1-ol and 3-mercaptohexyl acetate, already known to contribute to the aroma of passion fruit (Passiflora edulis), 3- mercapto-3-methylbutan-1-ol and 3-mercapto-3-methylbutyl acetate have been identified for the first time in this fruit. 3-Mercaptohexan-1-ol and 3- mercapto-3-methylbutan-1-ol may be produced in vitro from nonvolatile extracts of this fruit by the enzymatic action of a cell-free extract of Eubacterium limosum, which has a β-lyase activity on S-cysteine conjugates (EC 4.4.1.13). This release strongly suggests that these volatile thiols are present in combined form, as S-cysteine conjugates. It was possible to identify the precursor of 3-mercaptohexan-1-ol as S-(3-hexan-1-ol)-L- cysteine, in the form of trimethylsilylated derivatives from the juice of this fruit, using GC/MS analysis. The presence of free and combined forms of these volatile thiols in this fruit has now been demonstrated.
Volatile organic sulfur-containing constituents in Poncirus trifoliata (L) Raf. (Rutaceae)
Starkenmann, Christian,Niclass, Yvan,Escher, Sina
, p. 4511 - 4517 (2008/09/20)
During our screening of plant materials to find new natural fragrance and flavor ingredients, we discovered two series of 3-sulfanylalkyl alkanoates in a peel extract of fruits of wild-growing Poncirus trifoliata (L) Raf. (Rutaceae), a species closely related to Citrus. The two series belong to alkanoates of 3-methyl-3-sulfanylbutan-1-ol and 3-sulfanylhexan-1-ol, respectively, and thus are members of a family of natural molecules having in common a 1,3-positioned O,S moiety. The alkanoate residues comprise all even-numbered saturated fatty acids from C2 (acetate) to C18 (octadecanoate). Among the 20 sulfur-containing compounds identified, 14 are described for the first time as naturally occurring in a botanical species. Several cysteine-S-conjugates were synthesized as hypothetical precursors of the new volatile sulfur-containing constituents, where after S-(3-hydroxy-1,1-dimethylpropyl)-L-cysteine, S-[3-(acetyloxy)-1,1- dimethylpropyl]-L-cysteine, and S-[1-(2-hydroxyethyl)butyl]-L-cysteine were identified in the fruit peel. No cysteine-S-conjugates were detected in the fruit juice.
Nitrosated and nitrosylated alpha-adrenergic receptor antagonist compounds, compositions and their uses
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, (2008/06/13)
The present invention is directed to nitrosated or nitrosylated a-adrenergic receptor antagonists, compositions comprising a-adrenergic receptor antagonists that are optionally substituted with at least one NO or NO2 moiety and compounds that donate, transfer or release nitric oxide or elevate levels of endogenous endothelium-derived relaxing factor, and methods for treating sexual dysfunctions in males and females.
Nitrosated and nitrosylated alpha-adrenergic receptor antagonists, compositions and methods of use
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, (2008/06/13)
The present invention describes novel nitrosated and/or nitrosylated α-adrenergic receptor antagonists, and novel compositions containing at least one nitrosated and/or nitrosylated α-adrenergic receptor antagonist, and, optionally, one or more compounds
NITROSATED AND NITROSYLATED ALPHA-ADRENERGIC RECEPTOR ANTAGONIST, COMPOSITIONS AND METHODS OF USE
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, (2008/06/13)
The present invention describes novel nitrosated and/or nitrosylated α-adrenergic receptor antagonists, and novel compositions containing at least one nitrosated and/or nitrosylated α-adrenergic receptor antagonist, and, optionally, one or more compounds
Nitrosated and nitrosylated α-adrenergic receptor antagonist compounds, compositions and their uses
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, (2008/06/13)
Disclosed are nitrosated and nitrosylated α-adrenergic receptor antagonists, compositions of an α-adrenergic receptor antagonist (α-antagonist), which can optionally be substituted with at least one NO or NO2 moiety, and a compound that donates
Mercapto alcohols and mercaptoalkyl esters
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, (2008/06/13)
New compounds having the formula EQU1 wherein R1 represents a hydrocarbon moiety having from 1 to 7 carbontoms, R2 is hydrogen, methyl or ethyl, and R3 is hydrogen, formyl or acetyl. The compounds are useful in the preparation, modification and intensification of a great variety of flavor and perfume compositions.
