Reference of 407-20-5 ,Some common heterocyclic compound, 407-20-5, molecular formula is C5H3BrFN, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.
To a stirred solution of diisopropylamine (0.48 mL, 0.0034 mol) in dry tetrahydrofuran (10 mL) was added 1.6 M rc-butyl lithium in hexane (2.39 mL, 0.00369 mol) drop wise under nitrogen atmosphere at -78 C and stirred for 30 min at -78 C. To the above stirred mixture was added a solution of 3-bromo-5-fiuoropyridine (0.5 g, 0.00284 mol) in dry tetrahydrofuran at -78 C and stirred for 45 min. After 45 min, a solution of hexachloroethane in dry tetrahydrofuran was added to the above reaction mixture at -78 C and stirred for 30 min at -78 C. The reaction mixture was slowly warmed to RT and stirred for 1 h. The reaction was quenched with saturated solution of ammonium chloride (10 mL) and extracted with diethyl ether (25 mL x 3). The combined organic layer was washed with water, saturated aqueous sodium chloride solution, dried over anhydrous sodium sulphate and evaporated. The obtained crude was purified with silica gel chromatography by hexane to afford the title compound. lH NMR (400 MHz,CDC13) delta: 8.58 (s, 1 H), 8.43 (s, 1 H). MS (M+l): 209.9.
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,407-20-5, its application will become more common.
Reference:
Patent; MERCK SHARP & DOHME CORP.; ElexoPharm GmbH; HOYT, Scott, B.; PETRILLI, Whitney Lane; LONDON, Clare; XIONG, Yusheng; TAYLOR, Jerry Andrew; ALI, Amjad; LO, Michael; HENDERSON, Timothy, J.; HU, Qingzhong; HARTMANN, Rolf; YIN, Lina; HEIM, Ralf; BEY, Emmanuel; SAXENA, Rohit; SAMANTA, Swapan Kumar; KULKARNI, Bheemashankar, A.; WO2012/148808; (2012); A1;,
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