Tritiated peptides. Part 11. Synthesis of [4-3H-Phe6]-, [4-3H-Phe11]-, and [4-3H-Phe6,11]-somatostatin and the metabolite [des-Ala1]-somatostatin
作者:Mark C. Allen、Derek E. Brundish、John R. Martin、Roy Wade
DOI:10.1039/p19810002040
日期:——
ion-exchange and high-pressure liquid chromatography, and by enzymic digestion of the products modified by reduction and aminoethylation. The synthesis of the metabolite [des-Ala1]-somatostatin is described. The syntheses of [Phe(I)6]-, [Phe(I)11]- and [Phe(I)6,11]-somatostatin are described.
合成方法描述了生长抑素+在位置6和11的苯丙氨酸残基中分别用tri标记,在残基6和11处分别用by标记,分别通过完全保护的还原性碘化反应使比放射性活度分别为15.5、13.8和14.1 Cim mol –1。前体。半胱氨酸残基受S-三苯甲基保护,二硫键由碘化oxidation化的受保护前体形成。通过酸性水解,离子交换和高压液相色谱,以及通过酶消化经还原和氨乙基化改性的产物,评估产物的纯度。描述了代谢物[des-Ala 1 ]-生长抑素的合成。[Phe(描述了I)6 ]-,[Phe(I)11 ]-和[Phe(I)6,11 ]-生长抑素。