Amino-acids and peptides. Part IX. Some neighbouring-group amino–amide and hydroxy–amide interactions
作者:Jacquita A. Davies、C. H. Hassall、I. H. Rogers
DOI:10.1039/j39690001358
日期:——
Base-catalysed hydrolysis studies have provided evidence of neighbouring-groupamino–amideinteractions in compounds with the formulae H2N·[CH2]x·CO·NHMe (x= 3, 4, or 5), and in 6-aminodecane-10-lactam. Acid-catalysed hydrolysis studies have indicated that transannular hydroxy-amideinteractions occur with 4-hydroxyhexane-6-lactam, 5-hydroxyoctane-8-lactam, and 6-hydroxydecane-10-lactam. The mechanisms
碱催化的水解研究提供了在具有以下化学式的化合物H 2 N·[CH 2 ] x ·CO·NHMe(x = 3、4、5)和6-氨基癸烷中相邻基团氨基酰胺相互作用的证据。-10-内酰胺 酸催化的水解研究表明,环戊基羟基酰胺相互作用与4-羟基己烷-6-内酰胺,5-羟基辛烷-8-内酰胺和6-羟基癸烷-10-内酰胺发生。讨论了这些反应的机理以及此类过程在肽化学中的意义。
Redox‐Mediated Amination of Pyrogallol‐Based Polyphenols
作者:Salavat S. Ashirbaev、Natércia F. Brás、Patricia Frei、Kuangjie Liu、Simone Moser、Hendrik Zipse
DOI:10.1002/chem.202303783
日期:2024.2.26
Amyloids are known to be modified by natural polyphenols via amination. This study investigates the oxidative coupling mechanisms between polyphenols and N-nucleophiles, using in vitro and in silico approaches. It is shown that polyphenols with a pyrogallol substructure and an electron-withdrawing group at the C4a-position are most effective. These insights can play a crucial role in drug design against