N-Heterocyclic Carbene Catalysed Oxidative Coupling of Aldehydes with Alcohols/Thiols and One-Pot Oxidation/Esterification of Allylic Alcohols
作者:Miran Ji、Xi Wang、Yu Na Lim、Ye-Won Kang、Hye-Young Jang
DOI:10.1002/ejoc.201301337
日期:2013.12
carbene-catalysed oxidation protocol involving N-heterocyclic carbene catalysts and 2,2,6,6-tetramethylpiperidine N-oxyl (TEMPO) is described for the synthesis of esters, cinnamic acids, and thioesters. A wide range of esters, thioesters, and cinnamic acids were obtained by metal-free coupling of aldehydes with aliphatic, allylic and aromatic alcohols, benzyl mercaptan, and water. In addition to the oxidative coupling
描述了一种涉及 N-杂环卡宾催化剂和 2,2,6,6-四甲基哌啶 N-氧基 (TEMPO) 的多功能卡宾催化氧化方案,用于合成酯、肉桂酸和硫酯。通过醛与脂肪醇、烯丙醇和芳香醇、苄基硫醇和水的无金属偶联,可以获得多种酯、硫酯和肉桂酸。除了醛与亲核试剂的氧化偶联外,在我们的氧化偶联条件下还发现了饱和醛的脱氢和烯丙醇的氧化。与其他 TEMPO 介导的氧化酯化反应不同,该反应不会通过 TEMPO 酯中间体进行以形成酯和硫酯。