Design and synthesis of amidine-type peptide bond isosteres: application of nitrile oxide derivatives as active ester equivalents in peptide and peptidomimetics synthesis
作者:Eriko Inokuchi、Ai Yamada、Kentaro Hozumi、Kenji Tomita、Shinya Oishi、Hiroaki Ohno、Motoyoshi Nomizu、Nobutaka Fujii
DOI:10.1039/c0ob01193b
日期:——
peptidomimetic. The peptidyl amidine units were synthesized by the reduction of a key amidoxime (N-hydroxyamidine) precursor, which was prepared from nitrile oxide components as an aminoacyl or peptidyl equivalent. This nitrile oxide-mediated C–N bond formation was also used for peptide macrocyclization, in which the amidoxime group was converted to peptide bonds under mild acidic conditions. Syntheses of
基于肽键羰基(C O)基团被亚氨基(C NH)基团取代,设计了idine型肽键等位基因。等规部分的带正电性质类似于还原的酰胺型拟肽。通过还原关键的mid胺肟(N-羟基am)前体来合成肽基am单元,该关键的ox胺肟前体是由作为腈酰基或肽基当量的腈氧化物组分制备的。这种由一氧化氮介导的C–N键的形成也用于肽大环化,其中a胺肟基团在温和的酸性条件下转化为肽键。提出了使用两种方法合成环状RGD肽和拟肽的方法,以及它们对整联蛋白介导的细胞附着的抑制活性。