Borane;tetrahydrofuran → (3-Ethoxypyridin-2-yl)methanol

関与物質

反応手順

To a solution of 3-ethoxypicolinic acid (0.202 g, 1.21 mmol) in dry THF (1 mL) was added BH3.THF (1.0 M in THF, 5.0 mL, 5.0 mmol) and the reaction mixture stirred at room temperature for 2.5 hours. The mixture was then quenched with methanol (20 mL), stirred at reflux for 4 hours and concentrated under reduced pressure. The resultant crude product was dissolved in methanol (3×15 mL) and concentrated to give the desired crude alcohol (0.231 g) as an orange solid. 1H NMR (CDCl3): δ 1.46 (t, 3H, J=7.0 Hz), 4.07 (q, 2H, J=7.0 Hz), 4.74 (s, 2H), 7.09–7.20 (m, 2H), 8.14 (d, 1H, J=4.5 Hz).

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