HRID20422

反应详情

EQUATION

反应方程式

HRID 20422 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

Add sodium hydride (4.4 g, 110 mmol, 60% in mineral oil) portionwise to a room temperature maintained solution of (R)-4-[(1S,2S)-2-dibenzylamino-3-(3,5-difluorophenyl)-1-hydroxypropyl]-2,2-dimethyloxazolidine-3-carboxylic acid tert-butyl ester (50.5 g, 89.222 mmol) and benzyl bromide (22 mL, 184.96 mmol) in N,N-dimethylformamide (400 mL). Stir for 15 minutes and pour into saturated aqueous ammonium chloride. Extract with ethyl acetate, dry (magnesium sulfate), filter, concentrate and purify (silica gel chromatography, eluting with 2:98 to 4:96 ethyl acetate:hexanes) to give the title compound as a viscous oil that solidifies upon standing (48.5 g, 83%).

WORKUP

后处理

  1. extractionExtract with ethyl acetate
  2. dry with materialdry (magnesium sulfate)
  3. filtrationfilter
  4. concentrationconcentrate
  5. custompurify
  6. wash(silica gel chromatography, eluting with 2:98 to 4:96 ethyl acetate:hexanes)