HRID374325

反应详情

EQUATION

反应方程式

HRID 374325 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

A solution of 0.3 g of N-[4-(2-pyridylaminocarbonyl)-(S,S)-2,4-dibenzylbutyryl]-S-benzyl-(L)-cysteine methyl ester and 1 ml of 1N sodium hydroxide in 2 ml of methanol is stirred at room temperature overnight. To the solution is added 1.1 ml of 1N hydrochloric acid. The solution is concentrated, diluted with water, the solid is collected and dried under high vacuum to give N-[4-(2-pyridylaminocarbonyl)-(S,S)-2,4-dibenzylbutyryl]-S-benzyl-(L)-cysteine, melting at 75°-80°; [alpha]D =+22.9°.

WORKUP

后处理

  1. concentrationThe solution is concentrated
  2. additiondiluted with water
  3. customthe solid is collected
  4. customdried under high vacuum