S-Methyl methanethiosulfonate → Trifluoro-1-(4-methyldisulfanyl-phenyl)-ethanol

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Methanethiosulfonic acid S-methyl ester (0.02 ml, 0.22 mmol) was dissolved in an EtOH (0.46 mL) and saturated NaCO3/H2O (pH 8) solution (0.8 mL) under argon at 0° C. A solution of 2,2,2-trifluoro-1-(4-mercapto-phenyl)-ethanol (5) (22 mg, 0.11 mmol) dissolved in THF (1.5 mL) under argon was added dropwise. After 10 minutes, the reaction temperature was raised to room temperature. After 36 hours, the reaction was extracted with ethyl acetate (3×30 mL) and H2O (30 mL). The combined organic phases were dried over Na2SO4 and under reduced pressure. Flash chromatography on silica gel using 0-30% acetone/hexane gave Compound 15 as a yellow oil (23 mg, 86% yield). 1H NMR (400 MHz, CDCl3): δ 7.5 (m, 4H), 5.02 (q, J=6.7 Hz, 1H), 2.45 (s, 3H); 19F NMR (376 Hz, CDCl3) δ −78.79 (d); 13C NMR (100 MHz, CH3OD): δ 137.6, 134.2, 128.8, 126.4, 124.6 (q, JCF=281.7 Hz), 71 (q, JCF=31.5 Hz), 21.5.

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