Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 849758-12-9, name is Methyl 4-bromo-3-fluorobenzoate, This compound has unique chemical properties. The synthetic route is as follows., HPLC of Formula: C8H6BrFO2
Step b) Methyl 4-acetoxy-3-fluorobenzoate (9b) Allyl chloride (105 muL, 1.28 mmol) and TFA (20 muL, 0.26 mmol) were added to a suspension of zinc dust (480 mg, 7.34 mmol) and anhydrous cobalt(II) bromide (96.6 mg, 0.44 mmol) in MeCN (4 mL), under inert gas. After stirring at room temperature for 10 min, the aryl bromide (1.003 g, 4.30 mmol dissolved in 5 mL MeCN) from (a) was added, followed by acetic anhydride (0.45 mL, 4.79 mmol) and more MeCN (1 mL). The mixture was stirred overnight, quenched with 1M HCl (20 mL), and then extracted with EtOAc (3*20 mL). The organic phase was washed successively with saturated aqueous NaHCO3 (20 mL) and saturated NaCl (2*20 mL), dried (Na2SO4), and concentrated. Flash chromatography (silica, 6/1 to 4/1 petroleum ether-EtOAc gave recovered bromide (161.1 mg, 16%) and the desired ketone (white solids, 305.5 mg, 36%). NMR (CDCl3) delta ppm: 1H (400 MHz) 7.94-7.86 (m, 2H), 7.80 (dd, 1H, J=11.2, 1.6 Hz), 3.95 (s, 3H), 2.67 (d, 3H, J=4.4 Hz); 19F (376 MHz)-109.2 (m); 13C (100 MHz) 195.4 (d, J=3.7 Hz), 165.1 (d, J=2.2 Hz), 161.6 (d, J=255 Hz), 135.8 (d, J=8.1 Hz), 130.7 (d, J=2.9 Hz), 129.0 (d, J=14 Hz), 125.2 (d, J=3.6 Hz), 117.9 (d, J=26 Hz), 52.7 (s), 31.4 (d, J=7.3 Hz).
According to the analysis of related databases, 849758-12-9, the application of this compound in the production field has become more and more popular.
Reference:
Patent; Nilsson, Magnus; Oden, Lourdes; Kahnberg, Pia; Grabowska, Urszula; US2009/23748; (2009); A1;,
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