HRID2418571

反应详情

EQUATION

反应方程式

HRID 2418571 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

Condensation of BocPro-Phe-Phe-Glu(tBu)NHNH2 (0.570 g.) and HLeu-MetNH2 hydrochloride salt (Example 1, 0.560 g.) by the acyl azide method (Yajima et al., Chem. Pharm. Bull., vol. 19, p. 1900, 1971) have BocPro-Phe-Phe-Glu(tBu)-Leu-MetNH2 in 77% yield. De-t-butylation and de-t-butoxycarbonylation of BocPro-Phe-Phe-Glu(tBu)-Leu-MetNH2 using hydrogen chloride in acetic acid gave HPro-Phe-Phe-Glu-Leu-MetNH2, which was isolated as the amorphous off-white solid hydrochloride salt in 38% yield.