作者:Alexander H. Harkiss、Jonathan D. Bell、Astrid Knuhtsen、Andrew G. Jamieson、Andrew Sutherland
DOI:10.1021/acs.joc.9b00036
日期:2019.3.1
class of β-pyridyl α-amino acid is described using a highly regioselective, ytterbium-catalyzed hetero-Diels–Alder reaction of enones with vinyl ethers followed by a modified Knoevenagel–Stobbe reaction as the key heterocycle forming steps. Investigation of the properties and applications of these amino acids showed that they could be utilized in solid phase peptide synthesis for the preparation of a
描述了一种新的β-吡啶基α-氨基酸的制备方法,该方法利用区域选择性高、,催化的烯酮与乙烯基醚的杂-Diels-Alder反应,然后进行修饰的Knoevenagel-Stobbe反应作为关键的杂环形成步骤。对这些氨基酸的性质和应用的研究表明,它们可用于固相肽合成中以制备生物学上相关的六肽,而带有富电子取代基的吡啶则显示出强荧光性质,具有高量子产率和MegaStokes位移。溶剂化变色研究,具有最多的荧光氨基酸,p-甲氧基苯基类似物表明,这种基于电荷转移的生色团对溶剂极性高度敏感,当从THF变为磷酸盐缓冲液时,其红移为115 nm。