HRID1580886
反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
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
- customThe tetrapeptide derivative is precipitated by ether
- filtrationfiltered off
- washwashed with ether
- customAfter recrystallisation from ethanol the melting point is 229°-230°C. [α]D20 = -43° (c = 1 in methanol)