5-(Bromomethyl)-2-(trifluoromethyl)thiazole → 2-(Trifluoromethyl)-1,3-thiazole

関与物質

反応手順

A solution of 5-(bromomethyl)-2-(trifluoromethyl)-1,3-thiazole [prepared in accordance with U.S. Pat. No. 5,338,856] (170 mg, 069 mmol) in 5 mL of ethanol was treated sodium methylthiolate (60 mg, 0.86 mmol) at room temperature. The reaction was complete in 10 min and so the solvent was carefully removed under reduced pressure (40 mmHg) without heating. The residue was partitioned between dichloromethane and dilute hydrochloric acid, washed with saturated brine and dried over sodium sulfate. The solvent was again carefully removed under reduced pressure (40 mmHg) without heating to yield 5-[methylthio)methyl]-2-(trifluoromethyl)-1,3-thiazole (140 mg; 96%) as a pale orange liquid: 1H NMR (CDCl3) δ 7.75 (s, 1H), 3.90 (s, 2H), 2.10 (s, 3H); GCMS (FID) m/z 213 (M+).

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