Copper‐Promoted N‐Arylation of the Imidazole Side Chain of Protected Histidine by Using Triarylbismuth Reagents
作者:Hwai‐Chien Chan、Bianca Bueno、Adrien Le Roch、Alexandre Gagnon
DOI:10.1002/chem.202102186
日期:2021.9.20
The N-arylation of the sidechain of histidine by using triarylbismuthines is reported. The reaction is promoted by copper(II) acetate in dichloromethane at 40 °C under oxygen in the presence of diisopropylethylamine and 1,10-phenanthroline and allows the transfer of aryl groups with substituents at any position of the aromatic ring. The reaction shows excellent functional group tolerance and is applicable
报道了使用三芳基铋对组氨酸侧链进行 N-芳基化。在二异丙基乙胺和 1,10-菲咯啉的存在下,在 40 °C 的二氯甲烷中,乙酸铜 (II) 促进了该反应,并允许在芳环的任何位置具有取代基的芳基转移。该反应显示出优异的官能团耐受性,适用于组氨酸位于 N 端的二肽。在组氨酸占据 C 末端的二肽中观察到组氨酸引导的主链 NH 芳基化。
Design, synthesis, and complementary recognition of β-hairpin peptides stabilized by artificial DNA base-pairing amino acids
作者:Katsuhiro Isozaki、Kazushi Miki
DOI:10.1039/b924239b
日期:——
A novel DNA base-pairing beta-hairpin peptide involving intramolecular hydrogen bonds for induction of beta-hairpin secondary structure and intermolecular complementary hydrogen bonds between thymine and diaminopyridine for molecular recognition has been synthesized.