Isomerization of 3-pentyl-5-methyl-γ-sultine with iodine
摘要:
Isomerization of 3-pentyl-5-methyl-1,2-oxathiolane-2-oxide in the presence of iodine is described. A mechanistic pathway which involves a ring-opening reaction by cleavage of the C-O bond with or without epimerization at the sulfur atom is proposed, consistent with the stereochemical investigations. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
Analysis and Sensory Evaluation of the Stereoisomers of a Homologous Series (C5–C10) of 4-Mercapto-2-alkanols
作者:Svenja Nörenberg、Christiane Kiske、Bastian Reichardt、Verena Andelfinger、Anne Pfeiffer、Franziska Schmidts、Wolfgang Eisenreich、Karl-Heinz Engel
DOI:10.1021/acs.jafc.7b03543
日期:2017.10.11
the medium-chain homologues (C7–C9) of the 4-mercapto-2-alkanol stereoisomers. Except for the C5 homologue, the lowest odorthresholds were determined for the (2R,4R)-configured stereoisomers. The variability in odor qualities was mainly determined by the chain length. None of the 4-mercapto-2-alkanol stereoisomers showed consistent odor qualities for all homologues.
New Volatile Sulfur-Containing Constituents in a Simultaneous Distillation−Extraction Extract of Red Bell Peppers (Capsicum annuum)
作者:Regula Naef、Alain Velluz、Alain Jaquier
DOI:10.1021/jf072493y
日期:2008.1.1
mercapto-alcohols 17, 18, and 30, the dithiols 19 and 28, the methylthio-thiols 20 and 21, and the thiophene-thiol 31) and the two new dithiolanes 10 and 29. All of them are structurally related to the unsaturated C7- and C9-ketones 1- 4. The free thiols were enriched using Affi-Gel 501 ( p-aminophenyl-mercuric acetate grafted on an agarose gel). The new compounds were confirmed by syntheses and were organoleptically
Isomerization of 3-pentyl-5-methyl-1,2-oxathiolane-2-oxide in the presence of iodine is described. A mechanistic pathway which involves a ring-opening reaction by cleavage of the C-O bond with or without epimerization at the sulfur atom is proposed, consistent with the stereochemical investigations. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.