Direct Excitation of Aldehyde to Activate the C(sp2)−H Bond by Cobaloxime Catalysis toward Fluorenones Synthesis with Hydrogen Evolution,Angewandte Chemie International Edition

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Direct Excitation of Aldehyde to Activate the C(sp2)−H Bond by Cobaloxime Catalysis toward Fluorenones Synthesis with Hydrogen Evolution
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2022-12-13 , DOI: 10.1002/anie.202214944
Jia-Dong Guo _{1,

2} , Ya-Jing Chen _{1,

2} , Chen-Hong Wang _{1,

2} , Qiao He _{1,

2} , Xiu-Long Yang _{1,

2} , Tian-Yu Ding _{1,

2} , Ke Zhang _{1,

2} , Rui-Nan Ci _{1,

2} , Bin Chen _{1,

2} , Chen-Ho Tung _{1,

2} , Li-Zhu Wu _{1,

2}

Affiliation

Direct excitation of aldehydes to activate their C (sp²)−H bond through cobaloxime catalysis has been successfully developed. Upon irradiation, the highly reactive photoexcited triplet state of aromatic aldehyde intermediates is intercepted by the catalyst in the ground state, thus leading to the synthesis of a series of fluorenones, xanthones and thioxanthones in good to excellent yields without any external oxidants and with hydrogen as the byproduct.

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