HRID345258

反应详情

EQUATION

反应方程式

HRID 345258 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

Ortho-nitrobenzyl glyoxalate prepared from (0.650 g, 0.00153 mole) of di-o-nitrobenzyl tartarate, is dissolved in 20 ml benzene and refluxed using a Dean-Stark water separator containing CaH2 for an hour. Trans-3-(1-o-nitrobenzyloxycarbonylaminoethyl)-4-(2-acetoxyethyl)-2-azetidinone (0.580 g, 0.00153 mole) is added and the mixture is refluxed for 8 hrs, cooled, evaporated. The residue is column chromatographed (silica gel, ##STR222## to give 0.775 g (0.00132 mole, 87% yield) of the product.

WORKUP

后处理

  1. temperaturerefluxed
  2. additionseparator containing CaH2 for an hour
  3. temperaturethe mixture is refluxed for 8 hrs
  4. temperaturecooled
  5. customevaporated
  6. customchromatographed (silica gel, ##STR222##