(6-BroMopyridin-2-yl)acetic acid ethyl ester

5315-25-3

105-58-8

955369-63-8

To a solution of 2-bromo-6-methylpyridine (5.00 g, 29.0 mmol, CAS 5315-25-3) in tetrahydrofuran (THF, 100 mL) was slowly added lithium diisopropylammonium (LDA, 2.0 M, 30.5 mL) at -70 °C. The reaction temperature was maintained at -70 °C and after stirring for 0.5 h, diethyl carbonate (5.26 mL, 43.6 mmol) was added. The reaction mixture was slowly warmed to 20 °C and stirring was continued at this temperature for 4 hours. Upon completion of the reaction, the reaction mixture was washed with deionized water (120 mL) and subsequently extracted with ethyl acetate (3 x 150 mL). The organic layers were combined, dried with anhydrous sodium sulfate (Na2SO4), filtered and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: petroleum ether/ethyl acetate=10:1, v/v) to afford ethyl (6-bromopyridin-2-yl)acetate (5.50 g, 77% yield) as a pale yellow oil.1H NMR (400 MHz, CDCl3) δ=7.50-7.41 (m, 1H), 7.33 (d, J=7.6 Hz, 1H ), 7.21 (d, J=7.6Hz, 1H), 4.11 (q, J=7.2Hz, 2H), 3.75 (s, 2H), 1.20 (t, J=7.2Hz, 3H).