反应详情

Add 2583 mg (18.69 mmol) potassium carbonate, 2780 mg (12.46 mmol) 4-bromobutyric acid tert.-butyl ester and 184 mg (0.50 mmol) tetra-n-butylammonium iodide to a solution of 936 mg (12.46 mmol) (2S)-1-aminopropan-2-ol in 10 ml THF. Stir the reaction mixture for 48 h at room temperature. After filtering-off the inorganic salts, concentrate the filtrate by vacuum evaporation. Take up the residue in dichloromethane and chromatograph on silica gel (solvent: dichloromethane/methanol/35% aqueous ammonia solution 9:1:0.1). 810 mg (30% of theor.) of the desired product is obtained.

1. concentrationAfter filtering-off the inorganic salts, concentrate the filtrate
2. customby vacuum evaporation