‘Clickable’ 2,5-diketopiperazines as scaffolds for ligation of biomolecules: their use in Aβ inhibitor assembly
作者:E. Dufour、L. Moni、L. Bonnat、S. Chierici、J. Garcia
DOI:10.1039/c4ob00541d
日期:——
diketopiperazine ring formation as key steps. These scaffolds, with their glyoxylyl, aminooxy, alkynyl or azido functions, are “ready-to-use” platforms for biomolecular assembly. Their potentiality in this field was proved through the chemoselective ligation of Aβ-binding motifs, the KLVFFA peptide and the curcumin molecule. The inhibitory effect of these conjugates on Aβ amyloid fibril formation is reported
描述了1,3,6-三取代-2,5-二酮哌嗪支架的合成,该支架具有多达三个“可点击”的位点,用于进一步的肟键或炔-叠氮化物环加成连接。由L制备的正交受Boc / Alloc保护的DKP前体通过依次使用福山一光延烷基化,二肽偶联和二酮哌嗪环形成为关键步骤,可以有效地以克为单位有效制备赖氨酸残基和氨基己基臂。这些具有乙醛酸,氨氧基,炔基或叠氮基功能的支架是用于生物分子组装的“即用型”平台。通过Aβ结合基序,KLVFFA肽和姜黄素分子的化学选择性连接证明了它们在这一领域的潜力。使用硫黄素T荧光测定法和AFM观察报道了这些缀合物对Aβ淀粉样蛋白原纤维形成的抑制作用。