HRID2309090

反应详情

EQUATION

反应方程式

HRID 2309090 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

2

PROCEDURE

实验过程

0.84 g of triphenylphosphine is added to a solution of 0.63 g of 2-[(3S,4R)-4-acetylthio-3-methoxy-2-oxoazetidin-1-yl]-2-chloroacetic acid p-nitrobenzyl ester in 1.8 ml of dry tetrahydrofuran, and the mixture is stirred overnight at room temperature under nitrogen. The mixture is diluted with methylene chloride and washed with a cold, saturated, aqueous sodium bicarbonate solution. Additional washing with water, drying over sodium sulphate and concentrating by evaporation in vacuo yield the crude title compound which is purified by chromatography over silica gel with toluene/ethyl acetate (19:1 to 3:1).

WORKUP

后处理

  1. washwashed with a cold, saturated, aqueous sodium bicarbonate solution
  2. washAdditional washing with water
  3. dry with materialdrying over sodium sulphate
  4. concentrationconcentrating by evaporation in vacuo