HRID1708894

反应详情

EQUATION

反应方程式

HRID 1708894 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

To 50 ml of trifluoroacetic acid is added 23 g of 7β-[2-(5-tert-butoxycarbonylamino-1,2,4-thiadiazol-3-yl)-2(Z)-(tert-butoxycarbonylmethoxyimino)acetamido]-3-(3-oxobutyryloxymethyl)-3-cephem-4-carboxylic acid with stirring under ice-cooling. After removing the cooling-bath, the mixture is stirred for 1.5 hours. To the residue is added 50 ml of ethyl acetate and the solvent is evaporated off under reduced pressure. Fifty milliliter of ethyl acetate is added to the residue. Trituration and filtration of the resulting precipitate give 17 g of the above-identified compound.

WORKUP

后处理

  1. temperaturecooling
  2. customAfter removing the cooling-bath
  3. stirringthe mixture is stirred for 1.5 hours
  4. additionTo the residue is added 50 ml of ethyl acetate
  5. customthe solvent is evaporated off under reduced pressure
  6. additionFifty milliliter of ethyl acetate is added to the residue
  7. filtrationTrituration and filtration of the resulting precipitate