In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 369-26-6 as follows. name: Methyl 3-amino-4-fluorobenzoate
Methyl 3-amino-4-fluorobenzoate (2 g, 13 mmol) and pyridine (2.1 g, 76.4 mmol) were suspended in DCM (25 mL), and to the stirring solution was slowly added 2-trifluoromethyl- benzenesulfonyl chloride (3.24 g, 13 mmol) at room temperature. After stirring for 2 h, the reaction mixture was washed with water and then extracted with DCM. The combined organic layers were dried over Na2SOzI, filtered, and concentrated in vacuo. The crude residue was suspended in water (30 mL) followed by slow addition of NaOH (1.1 g, 28 mmol), and the mixture heated at reflux overnight. After cooling to room temperature, the reaction mixture was extracted with DCM. The layers were separated. The aq. layer adjusted to pH 5 with aq. 5N HCl, and extracted with EtOAc. The combined organic layers were dried over Na2SO4, filtered, and concentrated in vacuo to afford the final product as a solid (4.0 g, 83percent overall). LC-MS (ES) m/z = 364.1 (M+H)+ 1H NMR (400 MHz, DMSO-d6) delta ppm 10.61 (br, 1 H), 10.37 (br, 1 H), 8.78 (m, 1 H), 8.37 (m, 1 H), 8.01 (m, 2 H), 7.71 (m, 2 H), 7.31 (m, 2 H).
According to the analysis of related databases, 369-26-6, the application of this compound in the production field has become more and more popular.
Reference:
Patent; GLAXOSMITHKLINE LLC; LAFRANCE, Louis, Vincent; LEBER, Jack, Dale; LI, Mei; VERMA, Sharad, Kumar; WO2010/126922; (2010); A1;,
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