Photoredox Catalytic Phosphite‐Mediated Deoxygenation of α‐Diketones Enables Wolff Rearrangement and Staudinger Synthesis of β‐Lactams
作者:Hui Yang、Haijun Li、Guo Wei、Zhiyong Jiang
DOI:10.1002/anie.202107080
日期:2021.9
activation of C=O bonds by exploiting the photoredox chemistry of 1,3,2-dioxaphospholes, readily accessible from α-diketones and trialkyl phosphites, is reported. This mild and environmentally friendly strategy provides an unprecedented and efficient access to the Wolff rearrangement reaction which traditionally entails α-diazoketones as precursors. The resulting ketenes could be precisely trapped by
报道了一种新型的可见光驱动的 C=O 键催化活化,它利用 1,3,2-二氧杂磷的光氧化还原化学反应,很容易从 α-二酮和亚磷酸三烷基酯中获得。这种温和且环境友好的策略为沃尔夫重排反应提供了前所未有的有效途径,该反应传统上需要 α-重氮酮作为前体。生成的烯酮可以被醇/硫醇精确捕获以得到 α-芳基(硫代)乙酸酯,并被亚胺以高达 99% 的产率提供有价值的 β-内酰胺。