反应详情

To a solution of 1,3-butane diol (0.9 g, 10 mmol) and TEA (0.61 g, 6 mmol) in CH2Cl2 (4 mL) at 0° C. was added pentafluorobenzenesulfonyl chloride (0.53 g, 2 mmol) dissolved in CH2Cl2 (4 mL). The solution was stirred for 6 h over which time the solution slowly warmed to rt. Saturated aqueous NaHCO3 (25 mL) was added to the solution and the mixture was stirred at rt for 30 min. The organics were extracted with CH2Cl2 (50 mL) and washed with 0.5 M HCl (3×20 mL), saturated aqueous NaHCO3 (1×20 mL) and saturated aqueous NaCl (1×20 mL). The organics were dried over Na2SO4 and concentrated to give a crude mixture. Silica gel chromatography with ethyl acetate in hexanes yielded the desired product (0.26 g, 40%). 1H NMR (400 MHz CDCl3) δ 4.62 (m, 2H), 4.13 (m, 1H), 2.11 (m, 1H), 1.94 (m, 1H), 1.40 (d, 3H, J=6.2 Hz). Anal. Calcd. For C10H9F5O4S: C, 37.51; H, 2.83. Found: C, 37.70; H, 2.93.

1. stirringthe mixture was stirred at rt for 30 min
2. extractionThe organics were extracted with CH2Cl2 (50 mL)
3. washwashed with 0.5 M HCl (3×20 mL), saturated aqueous NaHCO3 (1×20 mL) and saturated aqueous NaCl (1×20 mL)
4. dry with materialThe organics were dried over Na2SO4
5. concentrationconcentrated
6. customto give a crude mixture