Metal-free approach for hindered amide-bond formation with hypervalent iodine(<scp>iii</scp>) reagents: application to hindered peptide synthesis
作者:Hyo-Jun Lee、Xiao Huang、Shigeyoshi Sakaki、Keiji Maruoka
DOI:10.1039/d0gc03912h
日期:——
A new bio-inspired approach is reported for amide and peptide synthesis using α-amino esters that possess a potential activating group (PAG) at the ester residue. To activate the ester functionality under mild metal-free conditions, we exploited the facile dearomatization of phenols with hypervalent iodine(III) reagents. Using a pyridine–hydrogen fluoride complex, highly reactive acyl fluoride intermediates
据报道,使用α-氨基酯在酯残基上具有潜在的活化基团(PAG)进行酰胺和肽合成的新方法受到了生物启发。为了在无金属的温和条件下激活酯官能团,我们利用高价碘(III)试剂对苯酚进行了轻松的脱芳香化作用。使用吡啶-氟化氢络合物,可以成功生成高反应性的酰基氟中间体,从而可以分别由庞大的胺和α-氨基酯平稳地形成位阻酰胺和肽。