HRID374314

反应详情

EQUATION

反应方程式

HRID 374314 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

A solution of 3.3 g of O-benzyl-(S)-serine and 1.8 g of sodium carbonate in 30 ml of water at 0° is added to 2.2 g of 4-ethoxycarbonyl-(S,S)-2,4-dibenzylbutyryl chloride and the mixture is stirred at room temperature for 4 hours. The mixture is extracted with ether, and the aqueous layer is acidified with 2N hydrochloric acid. The acidic solution is extracted with ethyl acetate, washed with saturated brine, dried (magnesium sulfate), filtered and concentrated to yield N-[4-ethoxycarbonyl-(S,S)-2,4-di-benzylbutyryl]-O-benzyl-(L)-serine.

WORKUP

后处理

  1. extractionThe mixture is extracted with ether
  2. extractionThe acidic solution is extracted with ethyl acetate
  3. washwashed with saturated brine
  4. dry with materialdried (magnesium sulfate)
  5. filtrationfiltered
  6. concentrationconcentrated