Sodium Hydroxide → 3-Amino-6-bromo-5-(trifluoromethyl)picolinic acid

関与物質

反応手順

3-Amino-6-bromo-5-trifluoromethyl-pyridine-2-carboxylic acid methyl ester (1.40 g, 4.68 mmol) was suspended in MeOH (15 ml); Sodium hydroxide (2.0 M aqueous solution) (14.04 ml, 28.1 mmol) was added and the suspension was stirred at RT overnight. The mixture was concentrated in vacuo and the resulting residue was dissolved in water (100 ml) and then acidifed by the addition of 5.0M HCl(aq). The product was extracted into ethyl acetate (2×75 ml) and the combined organic extracts were washed with water (50 ml), brine (25 ml), dried (MgSO4) and concentrated in vacuo to afford the title product as a yellow solid. 1H-NMR: [400 MHz, DMSO-d6, δH 13.24 (1H, br s, CO2H), 7.74 (1H, s, ArH), 7.17 92H, br s ArN H2). m/z 285.1, 287.1 [M+H]+

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