Site-Selective Esterifications of Polyol β-Hydroxyamides and Applications to Serine-Selective Glycopeptide Modifications
作者:Kohei Takemoto、Yasuhiro Nishikawa、Shohei Moriguchi、Yuna Hori、Yuki Kamezawa、Takami Matsui、Osamu Hara
DOI:10.1021/acs.orglett.9b02809
日期:2019.9.20
The site-selective acylations of β-hydroxyamides in the presence of other hydroxyl groups are described. Central to the success of this modification is the metal-template-driven acylation using pyridine ketoxime esters as acylating reagents in combination with CuOTf. This strategy enables β-hydroxyl groups to be site-selectively acylated in various derivatives, including sterically hindered secondary
描述了在其他羟基存在下β-羟基酰胺的位点选择性酰化。这种修饰成功的关键是金属模板驱动的酰化反应,该反应使用吡啶酮肟肟酯与CuOTf结合作为酰化剂。该策略使β-羟基能够在各种衍生物(包括空间受阻的仲β-醇)中位点选择性地被酰化。该方法的实用性通过用未保护的糖对糖肽进行丝氨酸选择性修饰来展示。