HRID904950

反应详情

EQUATION

反应方程式

HRID 904950 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

0.68 g of HOBt and 1.1 g of DCC are added successively to 1.54 g of Z-Arg-OH and 3.44 g of the compound prepared in accordance with (B), in 40 ml of dimethylformamide. After stirring overnight, the mixture is filtered, the filtrate is concentrated in vacuo and the residue is digested with ethyl acetate. The tert.-butyl group is split off analogously to Example 1 with trifluoroacetic acid and the compound is converted into its acetate and purified by chromatography on Sephadex® LH 20. Yield 2.9 g, aminoacid analysis: Glu 1.00, Val 1.89 and Arg 2.01.

WORKUP

后处理

  1. filtrationthe mixture is filtered
  2. concentrationthe filtrate is concentrated in vacuo
  3. customThe tert.-butyl group is split off analogously to Example 1 with trifluoroacetic acid
  4. custompurified by chromatography on Sephadex® LH 20