Citation: Guo-Cai Yuan, Ming-Gang Li, Sha Yang, Kanghui Song, Chen-Xu Gong, Shuang-Jun Zhu, Yuanming Li, Ke-Yin Ye. Electrophotocatalytic decarbonylative [4+2] cyclization of indenones[J]. Chinese Chemical Letters, ;2026, 37(6): 111709. doi: 10.1016/j.cclet.2025.111709 shu

Electrophotocatalytic decarbonylative [4+2] cyclization of indenones

Guo-Cai Yuan ^a ,
Ming-Gang Li ^a ,
Sha Yang ^a ,
Kanghui Song ^a ,
Chen-Xu Gong ^a ,
Shuang-Jun Zhu ^a ,
Yuanming Li ^{a, *,} ,
Ke-Yin Ye ^{a, b, *,}

a.
Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), College of Chemistry, Fuzhou University, Fuzhou 350108, China
b.
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China

yuanming.li@fzu.edu.cn

kyye@fzu.edu.cn

Received Date: 1 March 2025
Revised Date: 26 July 2025
Accepted Date: 12 August 2025
Available Online: 15 August 2025

Figures(7)

A neutral Diels-Alder reaction lacking enough electronic bias typically requires forcing conditions to proceed owing to the enlarged energy gap between HOMO and LUMO. We herein report an electrophotocatalytic decarbonylative [4 + 2] cyclization of indenones under mild reaction conditions for facile access toward various benzo[c]fluorenones. Mechanistic investigations revealed that this reaction first underwent photocatalytic decarbonylative [4 + 2] cyclization followed by an electrocatalytic oxidation. Consistent with their photophysical properties and DFT calculations, the obtained benzo[c]fluorenones displayed remarkable photocatalytic activity both in the current electrophotocatalytic decarbonylative [4 + 2] cyclization of indenones and in the oxidation of benzhydrol.
- Electrochemistry,
- Photochemistry,
- Diels-alder reaction,
- Indenone,
- Cyclization
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