HRID472109

反应详情

EQUATION

反应方程式

HRID 472109 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

1.1 ml (8 mmol) of triethylamine and then 1.8 ml (7 mmol) of 4-but-2-ynyloxybenzenesulfonyl chloride are added to a solution of 2.5 g (7 mmol) of dimethyl 2-aminomethyl-2-(4-tert-butoxycarbonylpiperazin-1-yl)malonate in 30 ml of dichloromethane. The reaction medium is stirred at ambient temperature for 2 hours and then concentrated under vacuum. The crude product obtained is purified by chromatography on silica gel, elution being carried out with a 70/30 heptane/ethyl acetate mixture. 2.1 g (51%) of dimethyl 2-(4-tert-butoxycarbonylpiperazin-1-yl)-2-[(4-but-2-ynyloxybenzenesulfonylamino)methyl]malonate are obtained in the form of a white solid.

WORKUP

后处理

  1. concentrationconcentrated under vacuum
  2. customThe crude product obtained
  3. customis purified by chromatography on silica gel, elution