Adding a certain compound to certain chemical reactions, such as: 7745-91-7, name is 3-Bromo-4-methylaniline, belongs to bromides-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 7745-91-7, Recommanded Product: 7745-91-7
Methyl chloroformate (0.202 ml, 2.62 mmol) was added to a solution of 3-bromo-4-methyl-phenylamine (243 mg, 1.31 mmol) in pyridine (2 ml), and the mixture was stirred at room temperature overnight. H2O was added to the reaction mixture, followed by extraction with AcOEt (x 2). The organic layers were combined and sequentially washed with H2O and saturated brine, and then dried over Na2SO4 and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (n-hexane/AcOEt) to give (3-bromo-4-methyl-phenyl)-carbamic acid methyl ester (288 mg, 90%). 1H-NMR (270 MHz, CDCl3) delta 2.34 (3H, s), 3.77 (3H, s), 6.51 (1H, br. s), 7.14 (1H, d, J = 7.2 Hz), 7.20 (1H, dd, J = 7.4, 2.0 Hz), 7.63 (1H, d, J = 2.0 Hz).
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Reference:
Patent; Chugai Seiyaku Kabushiki Kaisha; EP2433940; (2012); A1;,
Bromide – Wikipedia,
bromide – Wiktionary