反应详情

温度

-10 °C

Under argon, 10 g (20.11 mmol) of (−)-3-(2-benzyloxy-5-iodophenyl)-2(S)-tert-butoxycarbonylaminopropionic acid (Example (−)-6A) are dissolved in 200 ml of acetonitrile. To this are added 246 mg (2.01 mmol) of 4-dimethylaminopyridine and 4.16 ml (40.22 mmol) of benzyl alcohol. The mixture is cooled to −10° C., and 4.63 g (24.13 mmol) of EDC are added. The mixture is allowed slowly to reach RT and is stirred overnight. After about 16 h, the mixture is concentrated on a rotary evaporator in vacuo, and the residue is purified by column chromatography on silica gel (mobile phase: dichloromethane). Yield: 10.65 g (88% of theory).

1. customto reach RT
2. waitAfter about 16 h
3. concentrationthe mixture is concentrated on a rotary evaporator in vacuo
4. customthe residue is purified by column chromatography on silica gel (mobile phase: dichloromethane)