A new synergistic multicatalytic activation mode of eosinY has been discovered by exploiting the redox potential of its ground state and excited state. This catalytic strategy proves to be an enabling tool for visible‐light‐driven sequentialbenzylicC−Hamination and oxidation of o‐benzyl‐N‐methoxyl‐benzamides when using Selectfluor as a hydrogen atom transfer (HAT) reagent and O2 as oxidant. Efficient
<scp>Iron‐Catalyzed</scp> Amide Bond Formation from Carboxylic Acids and Isocyanates<sup>†</sup>
作者:Lingjian Zi、Jing Zhang
DOI:10.1002/cjoc.202300396
日期:2023.12
We describe an iron-catalyzed amidebondformation from readily available carboxylic acids and isocyanates. This method utilizes an abundant and biocompatible iron catalyst and easily accessible starting materials, generates CO2 as the only byproduct, and features broad substrate scopes with good functional group compatibility. Therefore, it provides a cost-effective and practical protocol to access
A copper-catalyzedaerobic 3-hydroxyisoindolinone synthesis was developed via the benzylic double C(sp3)–H functionalization of 2-alkylbenzamides. In this reaction, molecular oxygen was used as both an oxidant for C(sp3)–H functionalization and an oxygen source. Our method can be extended to diverse benzylic C(sp3)–H bonds and shows excellent functional group tolerance.