In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 4744-50-7 as follows. Application In Synthesis of 2,3-Pyrazinecarboxylic anhydride
General procedure: Sodium dodecyl sulfate (SDS, 6 mmol) was added to a stirred heterogeneous suspension of amine (5 mmol) in water (20 mL) until a homogeneous solution was formed, (in case of turbidity, the mixture was warmed to obtain a clear solution). Anhydride 17(5 mmol) dissolved in acetonitrile (5 mL) was added to this solution in one lot. After stirring for 1 h at room temperature, the acetonitrile was evaporated and the product precipitated from the aqueous layer. To the aqueous solution containing precipitate, solid sodium hydrogen carbonate was added pinch-wise until the effervescence ceased and the pH was 6.0. The remaining precipitated product was filtered, washed with water (20 mL), dried in a vacuum desiccator. In cases where the product did not precipitate, the reaction mixturewas extracted with ethyl acetate (2 25 mL). The combined organic extracts were dried with anhydrous Na2SO4 and the solvent was removed in a rotary evaporator under reduced pressure to yield the pure product.
According to the analysis of related databases, 4744-50-7, the application of this compound in the production field has become more and more popular.
Reference:
Article; Saudi, Milind; Zmurko, Joanna; Kaptein, Suzanne; Rozenski, Jef; Neyts, Johan; Van Aerschot, Arthur; European Journal of Medicinal Chemistry; vol. 87; (2014); p. 529 – 539;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem