A Clean and Selective Radical Homocoupling Employing Carboxylic Acids with Titania Photoredox Catalysis
作者:David W. Manley、John C. Walton
DOI:10.1021/ol502625w
日期:2014.10.17
A titania photoredox catalysis protocol was developed for the homocoupling of C-centered radicals derived from carboxylic acids. Intermolecular reactions were generally efficient and selective, furnishing the desired dimers in good yields under mild neutral conditions. Selective cross-coupling with two acids proved unsuccessful. An intramolecular adaptation enabled macrocycles to be prepared, albeit
开发了二氧化钛光氧化还原催化方案,用于衍生自羧酸的以C为中心的自由基的均偶联。分子间反应通常是有效的和选择性的,在温和的中性条件下以良好的产率提供了所需的二聚体。与两种酸的选择性交叉偶联证明是不成功的。分子内适应使大环化合物的制备,尽管产量适中。