Volume 134, Issue 7 e202116190
Forschungsartikel

A Carbene Strategy for Progressive (Deutero)Hydrodefluorination of Fluoroalkyl Ketones

Xiaolong Zhang

Xiaolong Zhang

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

These authors contributed equally to this work.

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Xinyu Zhang

Xinyu Zhang

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

These authors contributed equally to this work.

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Qingmin Song

Qingmin Song

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

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Dr. Paramasivam Sivaguru

Dr. Paramasivam Sivaguru

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

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Dr. Zikun Wang

Dr. Zikun Wang

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

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Prof. Giuseppe Zanoni

Prof. Giuseppe Zanoni

Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy

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Prof. Xihe Bi

Corresponding Author

Prof. Xihe Bi

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071 China

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First published: 09 December 2021
Citations: 9

Abstract

Hydrodefluorination is one of the most promising chemical strategies to degrade perfluorochemicals into partially fluorinated compounds. However, controlled progressive hydrodefluorination remains a significant challenge, owing to the decrease in the strength of C−F bonds along with the defluorination. Here we describe a carbene strategy for the sequential (deutero)hydrodefluorination of perfluoroalkyl ketones under rhodium catalysis, allowing for the controllable preparation of difluoroalkyl- and monofluoroalkyl ketones from aryl- and even alkyl-substituted perfluoro-alkyl ketones in high yield with excellent functional group tolerance. The reaction mechanism and the origin of the intriguing chemoselectivity of the reaction were rationalized by density functional theory (DFT) calculations.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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