Identification of 2-ethyl-4-methyl-3-thiazoline and 2-isopropyl-4-methyl-3-thiazoline for the first time in nature by the comprehensive analysis of sesame seed oil

J Food Sci. 2011 Apr;76(3):C385-91. doi: 10.1111/j.1750-3841.2011.02071.x. Epub 2011 Mar 16.

Abstract

Toasted sesame seed oil was comprehensively analyzed. It was extracted using the SAFE (Solvent-Assisted Flavor Evaporation) technique. The extract was analyzed by GC and GC-MS on 2 phases and a total of 87 components were identified, confirmed, and are presented in this paper. The major components were methylpyrazine; 2,5-dimethylpyrazine; 2,6-dimethylpyrazine; 2-ethyl-3,6-dimethylpyrazine; furfuryl alcohol; and guaiacol. In addition, as part of this analysis, 2-ethyl-4-methyl-3-thiazoline and 2-isopropyl-4-methyl-3-thiazoline were confirmed as being present in a natural product for the first time. Their identification, confirmation, and sensory evaluation have been documented here.

MeSH terms

  • Flame Ionization
  • Food Handling
  • Furans / analysis
  • Gas Chromatography-Mass Spectrometry
  • Guaiacol / analysis
  • Hot Temperature
  • Humans
  • Limit of Detection
  • Magnetic Resonance Spectroscopy
  • Maillard Reaction
  • Molecular Structure
  • Odorants
  • Pyrazines / analysis
  • Seeds / chemistry*
  • Sensation
  • Sesame Oil / chemistry*
  • Sesamum / chemistry*
  • Taste
  • Thiazoles / analysis*
  • Thiazoles / chemical synthesis
  • Thiazoles / chemistry

Substances

  • 2-ethyl-4-methyl-3-thiazoline
  • 2-isopropyl-4-methyl-3-thiazoline
  • Furans
  • Pyrazines
  • Thiazoles
  • Guaiacol
  • Sesame Oil
  • furfuryl alcohol