Synthetic Route of 74137-36-3, 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. 74137-36-3 name is 1,3-Dibromo-5-methoxybenzene, 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 1,3-dibromo-5-methoxybenzene (24.5 g, 92.13 mmol, 1 equiv) in Et2O (400 mL) under nitrogen, cooled to -78 oC and stirred for 20 min was added n-BuLi (2.5mol/L in THF, 44 mL, 1.20 equiv) dropwised at -78 oC. The reaction mixture was continued to stir for 1h at -78 oC followed by addition of DMF (8.1 g, 110.55 mmol, 1.2 equiv) dropwise. After stirring for 45 min at -78oC, the reaction was quenched with water (200 ml) carefully and extracted with EtOAc (500 mL) twice. The combined organic layers were concentrated under reduced pressure to give a mixture, which was further triturated with hexane (200mL) to afford 3-bromo-5-methoxybenzaldehyde (45-2) (14.5 g, 73.2%) as a white solid.
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 1,3-Dibromo-5-methoxybenzene, and friends who are interested can also refer to it.
Reference:
Patent; CYTOKINETICS, INC.; CHUANG, Chihyuan; MORGAN, Bradley P.; VANDERWAL, Mark; WANG, Wenyue; ASHCRAFT, Luke W.; (362 pag.)WO2019/144041; (2019); A1;,
Ether – Wikipedia,
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