Efficient Aryl Migration from an Aryl Ether to a Carboxylic Acid Group To Form an Ester by Visible-Light Photoredox Catalysis
作者:Shao-Feng Wang、Xiao-Ping Cao、Yang Li
DOI:10.1002/anie.201706597
日期:2017.10.23
We have developed a highly efficient aryl migration from an aryl ether to a carboxylic acid group through retro‐Smiles rearrangement by visible‐light photoredox catalysis at ambient temperature. Transition metals and a stoichiometric oxidant and base are avoided in the transformation. Inspired by the high efficiency of this transformation and the fundamental importance of C−O bond cleavage, we developed
通过在环境温度下通过可见光光氧化还原催化的逆向Smiles重排,我们开发了从芳基醚到羧酸基团的高效芳基迁移。在转化过程中避免使用过渡金属以及化学计量的氧化剂和碱。受到这种转化的高效率和C-O键断裂的基本重要性的启发,我们开发了一种新颖的方法来联苯醚的C-O裂解形成两个酚类化合物,如一锅,两锅在温和条件下的一步克级反应。芳基迁移表现出广泛的范围,并且可以用于合成诸如醋醋缩丁醛的药物化合物。初步的机理研究表明,催化循环是通过还原性淬灭途径发生的。