NDLI: Thermal behavior of two synthesized flavor precursors of pyrazine esters

Content Provider	Springer Nature Link
Author	Lai, Miao Zhao, Boya Ji, Xiaoming Fu, Peipei Wang, Pengze Bao, Xiaorong Zhao, Mingqin
Copyright Year	2015
Abstract	To develop thermal stable flavor of pyrazines, the two new flavor precursors of 3,6-dimethyl-2,5-pyrazinedicarboxylic acid leaf alcohol ester (DPALE) and 3,6-dimethyl-2,5-pyrazinedicarboxylic acid menthyl ester (DPAME) were synthesized by KMnO$_{4}$ oxidation, acylating chlorination, and esterification reaction. TG, DSC and Py-GC/MS were conducted to investigate the thermal decomposition process and the pyrolysis products of DPALE and DPAME. TG–DTG curves showed that T $_{p}$ of DPALE and DPAME with the largest mass loss rate were 304.9 and 319.9 °C, respectively. The T $_{peak}$ of DPALE and DPAME measured by DSC were 307.1 and 327.7 °C, respectively. The pyrolysis products were qualitatively and semiquantitatively analyzed by Py-GC/MS technology at 300, 600, and 900 °C. The results indicated that 600 °C was better than the other two temperatures to release specific aromas of leaf alcohol, 2-methylpyrazine, 2,5-dimethylpyrazine, menthol, and 3-p-menthene. Finally, the thermal behavior and the thermal decomposition mechanism of the flavor precursors of DPALE and DPAME were discussed. The study on the thermal behavior and pyrolysis products of these two flavor precursors of pyrazine esters would have them applied in food stuffs and tobacco to provide specific flavor of leaf alcohol, menthol, and alkylpyrazines.
Starting Page	479
Ending Page	487
Page Count	9
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	123
Issue Number	1
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-07-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pyrazine ester Flavor precursors DSC Py-GC/MS analysis Pyrolysis Thermal analysis Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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