反应详情

To a solution of 3-(1-tert-butoxycarbonyl-Benzimidazol-2-yl)propan-1-ol (186 mg, 0.67 mmol) in CH2Cl2 (4 mL) was added Dess-Martin reagent (314 mg, 0.74 mmol) and the resulting mixture was allowed to stir at room temperature under N2 for 1 hour. The mixture was further diluted with 300-mL ethyl acetate, and washed with 1N NaOH, brine and dried over Na2SO4. Evaporation of the solvent and flash chromatograph of residue over silica gel, using 20% ethyl acetate in CH2Cl2, gave the title compound (141 mg, 76%) as pure white solid. 1H NMR (CDCl3) □1.72 (s, 9H), 3.13 (t, 2H, J=6.8 Hz), 3.52 (t, 2H, J=6.8 Hz), 7.28-7.34 (m, 2H), 7.66-7.67 (m, 1H), 7.87-7.91 (m, 1H), 9.97 (s, 1H).

1. washwashed with 1N NaOH, brine
2. dry with materialdried over Na2SO4
3. customEvaporation of the solvent and flash chromatograph of residue over silica gel