Reference of 24241-18-7, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 24241-18-7 name is 2-Amino-3,5-dibromopyrazine, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.
A solution of 3,5-dibromopyrazin-2-amine X-9a (0.60 g, 2.37 mmol) and NaOMe (0.15 g, 2.78 mmol) in MeOH (15 mL) was heated to reflux for 1 h. Progress of the reaction was monitored by TLC and LCMS. After completion, the reaction mixture was cooled to room temperature. The precipitated solid was purified by column chromatography (silica, 100- 200 mesh, 10% EtOAc in hexane) to afford 5-bromo-3-methoxy-pyrazin-2-amine X-9 (0.295 g) as a white solid. (0843) Yield: 61 %. (0844) Basic LCMS Method 2 (ES+): 204 (M+H)+, 100% purity. 1 H NMR (400 MHz, DMSO-cfe) d 3.87 (s, 3H), 6.52 (brs, 2H), 7.57 (s, 1 H)
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2-Amino-3,5-dibromopyrazine, and friends who are interested can also refer to it.
Reference:
Patent; UCB PHARMA GMBH; PEGURIER, Cecile; PROVINS, Laurent; CARDENAS, Alvaro; LEDECQ, Marie; MUELLER, Christa E.; HOCKEMEYER, Joerg; EL-TAYEB, Ali; BOSHTA, Nader; RASHED, Mahmoud; (165 pag.)WO2019/243303; (2019); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem