光催化
镍
催化作用
芳基
材料科学
氮化碳
石墨氮化碳
卤化物
化学
无机化学
有机化学
烷基
作者
Bartholomäus Pieber,Jamal A. Malik,Cristian Cavedon,Sebastian Gisbertz,Aleksandr Savateev,Daniel Cruz,Tobias Heil,Guigang Zhang,Peter H. Seeberger
标识
DOI:10.1002/anie.201902785
摘要
Cross-coupling reactions mediated by dual nickel/photocatalysis are synthetically attractive but rely mainly on expensive, non-recyclable noble-metal complexes as photocatalysts. Heterogeneous semiconductors, which are commonly used for artificial photosynthesis and wastewater treatment, are a sustainable alternative. Graphitic carbon nitrides, a class of metal-free polymers that can be easily prepared from bulk chemicals, are heterogeneous semiconductors with high potential for photocatalytic organic transformations. Here, we demonstrate that graphitic carbon nitrides in combination with nickel catalysis can induce selective C-O cross-couplings of carboxylic acids with aryl halides, yielding the respective aryl esters in excellent yield and selectivity. The heterogeneous organic photocatalyst exhibits a broad substrate scope, is able to harvest green light, and can be recycled multiple times. In situ FTIR was used to track the reaction progress to study this transformation at different irradiation wavelengths and reaction scales.
科研通智能强力驱动
Strongly Powered by AbleSci AI