Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 123-32-0, name is 2,5-Dimethylpyrazine, This compound has unique chemical properties. The synthetic route is as follows., Quality Control of 2,5-Dimethylpyrazine
A method for preparing 5-methylpyrazine-2-carboxylic acid by catalytic oxidation, firstly, diatomaceous earth, manganese chloride, sodium tungstate,Cobalt nitrate and distilled water were added to the reactor at the following element mass ratio: diatomaceous earth: Mn:W:Co:H2O=1:0.09:0.08:0.14:50,Magnetically stirring at room temperature to make it dispersed and uniformly adsorbed, and then removing water by evaporation.Adding a liquid silica sol with a total mass of 5% of the solid sample and kneading it into a small granular sample of 1-2 mm.The mixture was placed in a muffle furnace and calcined in an air atmosphere at 600 C for 5 hours to obtain Mn-W-Co/diatomaceous earth-supported catalyst particles.10 g of Mn-W-Co/diatomaceous earth catalyst particles were packed into a fixed bed microreactor reaction tube, and the reactor was heated to 330 C.The reaction raw material 2,5-dimethylpyrazine was introduced into a fixed bed reaction tube by bubbling with high-temperature steam at 10 ml/min.Oxygen is introduced into the reaction tube separately at 20 ml/min to cause catalytic oxidation of 2,5-dimethylpyrazine in the catalytic bed.The 5-methylpyrazine-2-carboxylic acid is produced and taken out of the reaction tube by water vapor, condensed, crystallized, and collected.Analysis of 5-methylpyrazine-2-carboxylic acid by gas chromatographyThe yield was 75.6%.
Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand reaction routes of 123-32-0.
Reference:
Patent; Lanzhou University; Dong Zhengping; (6 pag.)CN109369544; (2019); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem