Benzyl Alcohol → 2-(6-Benzyloxy-pyrazin-2-yl)-4-methyl-thiazole-5-carboxylic acid 4-fluoro-benzylamide

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反応手順

To a solution of benzyl alcohol (25 μL, 0.24 mmol) in dimethyl acetamide (0.5 mL) in the sealed tube was added NaH (10.4 mg, 0.26 mmol). The reaction mixture was stirred at room temperature. After 30 min, a solution of 2-(6-iodo-pyrazin-2-yl)-4-methyl-thiazole-5-carboxylic acid 4-fluoro-benzylamide (100 mg, 0.22 mmol) and diisopropyl ethylamine (96 μL, 0.55 mmol) was added to the reaction mixture. The reaction mixture was stirred at 100° C. After 12 hr, the reaction mixture was cooled to room temperature, quenched with methanol, diluted with CH2Cl2, washed with water and brine, then dried (Na2SO4), filtered, and concentrated in vacuo. The residue was purified by column chromatography to give the title compound in 60% yield. 1H NMR (400 MHz, CD2Cl2) δ 8.92 (s, 1H), 8.29 (s, 1H), 7.47-7.51 (m, 2H), 7.31-7.40 (m, 5H), 7.02-7.08 (m, 2H), 6.20 (bs, 1H), 5.44 (s, 2H), 4.57 (d, J=8.0 Hz, 2H), 2.72 (s; 3H); MS (ES+) m/z 435.2 (M+1), Rt=1.65 min.

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