88394-05-2Relevant academic research and scientific papers
Preparation method, product and application of 2-amino-5-methylpyrazine
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Paragraph 0037-0039; 0048-0050; 0059-0061, (2020/11/25)
The invention belongs to the field of chemical synthesis, and relates to a preparation method, product and application of 2-amino-5-methylpyrazine. The preparation method comprises the following steps: reacting 2-aminomalonamide with pyruvic aldehyde to generate 2-methyl-5-hydroxy-4-pyrazinamide; enabling 2-methyl-5-hydroxy-4-pyrazinamide to react with phosphorus oxychloride so as to generate 2-methyl-5-chloro-4-cyanopyrazine; carrying out a hydrogenation reaction on the 2-methyl-5-chloro-4-cyanopyrazine to generate 2-methyl-4-cyanopyrazine, and hydrolyzing the 2-methyl-4-cyanopyrazine to obtain 2-methyl-4-amide pyrazine; and carrying out Hofmann degradation on the 2-methyl-4-amide pyrazine so as to obtain the 2-methyl-5-aminopyrazine. The method belongs to a brand-new 2-amino-5-methylpyrazine preparation method, is simple and convenient to operate, high in yield and low in cost, and is suitable for industrial large-scale production.
Synthesis process of 2-methyl-5-pyrazinecarboxylic acid
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Paragraph 0064-0066; 0073-0075; 0087-0089; 0096-0098, (2019/03/08)
The invention provides a method for preparing 2-methyl-5-pyrazinecarboxylic acid. The method provided by the invention is characterized in that potassium permanganate which is more harmful to the environment is not used, a target compound 2-methyl-5-pyrazinecarboxylic acid can be prepared from cheap and easily available methylglyoxal and 2-amino malonamide taken as raw materials through four stepsof cyclization, hydrolysis, chlorination and reduction, the yield of the reaction route is high, the amount of byproducts is small, and products are purer.
BICYCLIC COMPOUNDS AS ALLOSTERIC SHP2 INHIBITORS
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Paragraph 00681, (2018/08/20)
The present disclosure is directed to inhibitors of SHP2 and their use in the treatment of disease. Also disclosed are pharmaceutical compositions comprising the same.
THIENOPYRAZINE CARBOXAMIDES AS UBIQUITIN-SPECIFIC PROTEASE INHIBITORS
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Paragraph 00248, (2017/09/05)
The disclosure relates to inhibitors of USP28 and/or USP25 useful in the treatment of cancers, inflammation, autoimmune diseases, and infectious diseases, having the Formula: (I), where R1, R2, R3, R4, R4', R5, R6, X, and n are described herein.
