Adding a certain compound to certain chemical reactions, such as: 172921-33-4, name is 1-Bromo-4-chloro-2,5-difluorobenzene, belongs to chlorides-buliding-blocks compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 172921-33-4, Recommanded Product: 1-Bromo-4-chloro-2,5-difluorobenzene
1-Bromo-4-chloro-2,5-difluorobenzene (1.11 g, 4.9 mmol) was dissolved in tetrahydrofuran (THF; 15 mL) and cooled to -10¡ã C. A 2.0M solution of isopropyl-magnesium chloride (2.7 mL, 5.4 mmol) in THF was added dropwise via syringe. The reaction mixture was stirred at -10¡ã C. for 1 h, allowed to warm toward 0¡ã C. for 1 h, then cooled again to -10¡ã C. A solution of 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1.0 g, 5.4 mmol) in THF (1.0 mL) was then added dropwise and the reaction mixture was allowed to warm to ambient temperature. The reaction mixture was then added to diethyl ether and extracted with 1N sodium hydroxide twice. The aqueous phases were combined, acidified to pH 3 with concentrated HCl, and extracted with dichloromethane twice. The organic phases were combined, dried, filtered and concentrated to give the title compound (0.97 g, 72.3percent yield) that was used without further purification: 1H NMR (CDCl3) delta 7.45 (dd, 1H), 7.09 dd, 1H), 1.36 (s, 12H).
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Reference:
Patent; Dow AgroSciences LLC; US2009/88322; (2009); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics