15707-23-0Relevant articles and documents
Efficient synthesis method of 2-ethyl-3-methylpyrazine
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Paragraph 0024; 0029; 0035; 0041; 0049; 0053, (2018/04/01)
The invention discloses an efficient synthesis method of 2-ethyl-3-methylpyrazine. The method comprises specific steps as follows: 2,3-pentanedione is prepared from lactic acid as a raw material, a porous carrier is prepared from raw materials including diammonium hydrogen phosphate and barium nitrate, caesium supported on the carrier is taken as a catalyst, and the conversion rate of lactic acidis effectively increased; then, prepared 2,3-pentanedione and ethylenediamine are taken as raw materials and are sequentially subjected to dehydration condensation and dehydrogenation reactions, and 2-ethyl-3-methylpyrazine is prepared. The synthesis method is simple, low in cost and high in product yield.
The effect of pH on the formation of aroma compounds produced by heating a model system containing l-ascorbic acid with l-threonine/l-serine
Yu, Ai-Nong,Zhang, Ai-Dong
experimental part, p. 214 - 219 (2011/12/14)
The identification of aroma compounds, formed from the reactions of l-ascorbic acid with l-threonine/l-serine at five different pH values (5.00, 6.00, 7.00, 8.00, or 9.55) and 143 ± 2 °C for 2 h, was performed using a SPME-GC-MS technique, and further use
Ueber die Synthese von 2,3-Dialkylpyrazinen
Heyns, Kurt,Behse, Ernst,Francke, Wittko
, p. 240 - 245 (2007/10/02)
2,3-Dialkylquinoxalines (4), which are available from the reaction of benzofuroxan (1) with ketones and subsequent reduction of the 2,3-dialkylquinoxaline N,N'-dioxides (3), are converted to 2,3-dialkylpyrazines (6) by oxidation-decarboxylation steps.
