Design, Synthesis, and Evaluation of Phe-Gly Mimetics: Heterocyclic Building Blocks for Pseudopeptides
作者:Susanna Borg、Roeland C. Vollinga、Maryse Labarre、Kemal Payza、Lars Terenius、Kristina Luthman
DOI:10.1021/jm990197+
日期:1999.10.1
ring systems have been synthesized as building blocks in the synthesis of pseudopeptides. Three derivatives (1-3) have the carboxylic acid function directly bound to the heterocyclic ring, and three derivatives (4-6) have an extra methylene group between the heterocyclic ring and the acid function to allow for an increased conformational flexibility. The mimetics were used as Phe-Gly replacements in
含有1,3,4-恶二唑,1,2,4-恶二唑和1,2,4-三唑环系统的对映体杂环Boc保护的Phe-Gly二肽模拟物是伪肽合成中的结构单元。三个衍生物(1-3)具有直接键合到杂环上的羧酸官能团,并且三个衍生物(4-6)在杂环和酸官能团之间具有额外的亚甲基,以提高构象柔韧性。该模拟物用作生物活性肽dermorphin(Tyr-D-Ala-Phe-Gly-Tyr-Pro-Ser-NH(2))和P物质(Arg-Pro-Lys-Pro-Gln的Phe-Gly替代品) -Gln-Phe-Phe-Gly-Leu-MetNH(2),SP)。使用Boc化学方法在MBHA树脂上使用固相方法进行假肽合成。通过测试dermorphin假肽的微阿片受体亲和力和SP假肽的NK(1)受体亲和力来进行生物学评估。结果表明,除3个模拟物外,其他所有模拟物均是dermorphin中Phe-Gly的极佳替代品,因为它们对微受体(IC(50)=