Stabilized Analogs of Thymopentin. 2. 1,2- and 3,4-Ketomethylene Pseudopeptides
作者:Joseph I. DeGraw、Ronald G. Almquist、Charles K. Hiebert、Amrit K. Judd、Linda Dousman、R. Lane Smith、William R. Waud、Itsuo Uchida
DOI:10.1021/jm9508043
日期:1997.7.1
In this second paper in a series of three studies of stable analogs of thymopentin (Arg1-Lys2-Asp3-Val4-Tyr5), the synthesis of analogs stabilized at peptide bonds 1,2 and 3,4 via insertion of ketomethylene units is described. A tris(carbobenzyloxy)arginyl(k)norleucine pseudopeptide was synthesized and coupled to Asp-Val-Phe-resin units followed by HF cleavage to prepare Arg(k)Nle-Asp-Val-Phe analogs
在第二篇论文中,对胸腺五肽(Arg1-Lys2-Asp3-Val4-Tyr5)的稳定类似物进行了三项研究,描述了通过插入酮亚甲基单元稳定在肽键1,2和3,4上的类似物的合成。合成了三(羰基苄氧基)精氨酰基(k)正亮氨酸假肽,并偶联至Asp-Val-Phe-树脂单元,然后进行HF裂解,以制备Arg(k)Nle-Asp-Val-Phe类似物。N-BOC Asp(k)Val和N-BOC Asp(k)Ala单元的制备,然后偶联至Phe-或Tyr-树脂单元,提供了与树脂结合的拟三肽底物,用于附着各种精氨酰二肽。从树脂上裂解得到胸腺五肽的3,4-酮亚甲基稳定的假肽类似物。与胸腺五肽本身相比,Arg-Lys-Asp(k)Val-Phe和Arg-Lys-Asp(k)Val-Tyr类似物与CEM细胞的结合更为牢固。