反应详情

温度

0 °C

N-trityl-1,3-dihydroxy-2-propanamine (3.7 g; 11 mmol) is dissolved in THF (22 ml) and cooled to 0° C. NaH (0.44 g; 11 mmol; 60% in oil) is added and the reaction is warmed to room temperature and allowed to stir for 2 hours. 4-(benzoxazol-2-yl)benzylbromide (1.6 g; 5.5 mmol) is added and the reaction allowed to stir for 15 hours. The reaction is diluted with CH2Cl2 and washed with H2O 2×, dried (Na2SO4), concentrated and purified by column chromatography with basic alumina and eluted with 2% MeOH/98% CH2Cl2 to obtain N-trityl-1-[4-(benzoxazol-2-yl)benzyloxy]-3-hydroxy-2-propanamine as a white solid which is used directly in Step E.

1. temperaturethe reaction is warmed to room temperature
2. stirringto stir for 15 hours
3. washwashed with H2O 2×
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated
6. custompurified by column chromatography with basic alumina
7. washeluted with 2% MeOH/98% CH2Cl2