[OH:1][CH2:2][CH2:3][C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][C:5]=1[CH2:10][CH2:11][OH:12].C(N(CC)CC)C.[CH3:20][S:21](Cl)(=[O:23])=[O:22]>C(Cl)Cl>[OH:1][CH2:2][CH2:3][C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][C:5]=1[CH2:10][CH2:11][O:12][S:21]([CH3:20])(=[O:23])=[O:22]2-[2-(2-Hydroxy-ethyl)-phenyl]-ethanol (6.77 g/40 mmol) was dissolved in methylene chloride (100 mL) and cooled to 0° C. Triethylamine (11.0 mL/80 mmol) and methanesulfonyl chloride (5.25 mL/65 mmol) were added sequentially via addition funnel (dropwise). After an hour the reaction was poured into a separatory funnel and sequentially washed with 1 N hydrochloric acid (100 mL), water (100 mL) and saturated aqueous sodium bicarbonate (100 mL). The resulting organic solution was dried over magnesium sulfate, filtered and concentrated. Column chromatography on silica gel (eluting with 0→10% methanol/methylene chloride afforded methanesulfonic acid 2-[2-(2-hydroxy-ethyl)-phenyl]-ethyl ester (2.25 g/23%). 1H NMR (400 MHz, CDCl3) δ 7.25 (m, 4H), 4.42 (t, J=7.1 Hz, 2H), 3.88 (m, 2H), 3.15 (t, J=7.1 Hz, 2H), 2.93 (t, J=7.1 Hz, 2H), 2.85 (s, 3H).
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