Stereoselective Synthesis of Novel Dipeptide β-Turn Mimetics Targeting Melanocortin Peptide Receptors
作者:Junyi Zhang、Chiyi Xiong、Jinfa Ying、Wei Wang、Victor J. Hruby
DOI:10.1021/ol0351347
日期:2003.8.1
[reaction: see text] The novel dipeptide beta-turn mimetic, 4,8-disubstituted azabicyclo[4.3.0]nonane amino acid ester (15), has been synthesized to serve as a peptide mimetic of the dipeptide Phe-Arg, which contains two important pharmacophore elements in melanotropin peptides. Introduction of side-chain functionality at C-8 was achieved by using beta-functionalized pyroglutamate (8) as a synthetic
[反应:参见文本]新型二肽β-turn模拟物4,8-二取代的氮杂双环[4.3.0]壬烷氨基酸酯(15)已被合成为二肽Phe-Arg的肽模拟物。在黑素蛋白肽中含有两个重要的药效基团元素。通过使用β-官能化焦谷氨酸(8)作为合成前体,可以在C-8引入侧链功能。通过溴化脱氢氨基酸中间体(10),然后进行Suzuki交叉偶联,引入C-4的侧链。