Sodium hydride → Ethyl 4-[4-(benzyloxy)phenyl]-2-(methylsulfonyl)butanoate

関与物質

反応手順

Sodium hydride (1.80 g, 45 mmol, 60% in mineral oil) was added in three portions to a solution of ethyl (methylsulfonyl)acetate (6.70 g, 40.3 mmol) in DMF (200 mL) at 0° C. The reaction was allowed to warm to room temperature and stirred for 1 hour. 1-(Benzyloxy)-4-(2-iodoethyl)benzene was added to the solution and the reaction was stirred overnight at rt. The reaction was quenched with 1N aqueous HCl (200 mL) and extracted with ethyl acetate (3×100 mL). The combined organics were dried (MgSO4), filtered and concentrated in vacuo. Chromatography on a Biotage 40 L column using 1:4 ethyl acetate in heptane afforded the title compound as a white solid (13.13 g, 86.5%). LC-MS m/z 375.2 (M−1). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.34 (t, J=7.03 Hz, 3H) 2.31-2.47 (m, 2H) 2.55-2.68 (m, 1H) 2.70-2.80 (m, 1H) 3.00 (s, 3H) 3.66-3.80 (m, 1H) 4.18-4.38 (m, 2H) 5.06 (s, 2H) 6.92 (d, J=8.59 Hz, 2H) 7.09 (d, J=8.59 Hz, 2H) 7.31-7.47 (m, 5H).

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