HRID971560

反应详情

EQUATION

反应方程式

HRID 971560 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

1.36 g of H-Ala-Ile-Gly-OMe (compare Example 1) and 2.5 g of Z-Thr(tBu)-OSU in 3 ml of dimethylformamide are stirred for 20 hours at room temperature. The tetrapeptide derivative is precipitated by ether, filtered off and washed with ether. After recrystallisation from ethanol the melting point is 229°-230° C. [α]D20 = -43° (c = 1 in methanol). Rf = 0.55 in the system chloroform-methanol (95:5) on silica gel.

WORKUP

后处理

  1. customThe tetrapeptide derivative is precipitated by ether
  2. filtrationfiltered off
  3. washwashed with ether
  4. customAfter recrystallisation from ethanol the melting point is 229°-230° C. [α]D20 = -43° (c = 1 in methanol)