Synthesis of aliphatic α-ketoamides from α-substituted methyl ketones <i>via</i> a Cu-catalyzed aerobic oxidative amidation
作者:Hyojin Cha、Jin Young Chai、Hyeong Baik Kim、Dae Yoon Chi
DOI:10.1039/d1ob00129a
日期:——
for making aryl α-ketoamides as drug candidates have been greatly improved through metal-catalyzed aerobic oxidative amidations. However, the preparation of alkyl α-ketoamides through metal-catalyzed aerobic oxidative amidations has not been reported because generating α-ketoamides from aliphatic ketones with two α-carbons theoretically provides two distinct α-ketoamides. Our strategy is to activate
α-酮酰胺是一个重要的关键官能团,已被用作多种官能团转化中的通用且有价值的中间体和合成子。通过金属催化的好氧氧化酰胺化,制备芳基α-酮酰胺作为候选药物的合成方法得到了极大的改进。然而,尚未报道通过金属催化的需氧氧化酰胺化制备烷基α-酮酰胺,因为从理论上具有两个α-碳的脂肪族酮生成α-酮酰胺提供了两种不同的α-酮酰胺。我们的策略是通过引入N来激活 α-碳-在两个α位之一的取代基。该策略的关键是杂环化合物如三唑和咪唑如何影响烷基α-酮酰胺合成的选择性。从这个基本概念出发,通过优化反应和阐明通过铜催化的好氧氧化酰胺化合成芳基 α-酮酰胺的机理,我们以高产率(48-84%)制备了 14 种脂肪族 α-酮酰胺。