Anodic oxidation triggered divergent 1,2- and 1,4-group transfer reactions of β-hydroxycarboxylic acids enabled by electrochemical regulation
作者:Zhenxing Zhang、Lei Zhang、Xianhao Zhang、Jianxin Yang、Yunxing Yin、Yangye Jiang、Chengchu Zeng、Gang Lu、Yang Yang、Fanyang Mo
DOI:10.1039/d0sc02386h
日期:——
We report a set of electrochemically regulated protocols for the divergent synthesis of ketones and β-keto esters from the same β-hydroxycarboxylic acid starting materials. Enabled by electrochemical control, the anodic oxidation of carboxylic acids proceeded in either a one-electron or a two-electron pathway, leading to a 1,4-aryl transfer or a semipinacol-type 1,2-group transfer product with excellent
我们报告了一套由电化学调节的协议,用于从相同的β-羟基羧酸原料中合成酮和β-酮酸酯。通过电化学控制,羧酸的阳极氧化以单电子或双电子方式进行,从而导致1,4-芳基转移或半频哪醇型1,2-基团转移产物具有出色的化学选择性。1,4-芳基转移代表了碳-氧基转移通过根本机制。与先前报道的自由基基团转移反应相反,此1,4-基团转移过程的特征在于富电子芳基取代基的迁移。此外,利用这些化学选择性电化学氧化方案,可以以优异的产率合成多种酮和β-酮酯,包括具有难以接近的中等尺寸环的酮和β-酮酯。