Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 875781-43-4, name is 2-Bromo-5H-pyrrolo[2,3-b]pyrazine, A new synthetic method of this compound is introduced below., Product Details of 875781-43-4
To a solution of 2-bromo-5H-pyrrolo [2,3-b] pyrazine (3.1 g, 16 mmol)Of 1,4-dioxane (20 mL)Phosphorus oxychloride (2.27 mL, 24.1 mmol) was added to the solution andTriethylamine (220 [mu] L, 1.58 mmol)110 C for 6 hours,(50 mL x 3), dried over anhydrous sodium sulfate, and the mixture was concentrated and beaten (petroleum ether / ethyl acetate (v / v), and the mixture was stirred at room temperature (7 mL) ) = 2/1), filtration,Dried to give 1.3 g of a gray solid in 54% yield.
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Patent; Guangdong Dongyangguang Pharmaceutical Co., Ltd.; Liu Bing; Huang Jiuzhong; Zheng Changchun; Zhang Yingjun; Ouyang Luo; Mao Hongfen; Nie Biao; Xu Juan; Chen Hongfen; (137 pag.)CN106336413; (2017); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem