Volume 60, Issue 52 pp. 27271-27276
Communication

Electrochemical Oxo-Fluorosulfonylation of Alkynes under Air: Facile Access to β-Keto Sulfonyl Fluorides

Dr. Dengfeng Chen

Dr. Dengfeng Chen

Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, 210037 China

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Xingliang Nie

Xingliang Nie

Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), College of Chemistry, Fuzhou University, Fuzhou, 350108 China

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Qingyuan Feng

Qingyuan Feng

Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, 210037 China

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Yingyin Zhang

Yingyin Zhang

Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, 210037 China

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Yiheng Wang

Yiheng Wang

Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037 China

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Qiuyue Wang

Qiuyue Wang

Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037 China

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Prof. Dr. Lin Huang

Prof. Dr. Lin Huang

Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037 China

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Prof. Dr. Shenlin Huang

Corresponding Author

Prof. Dr. Shenlin Huang

Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, 210037 China

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Prof. Dr. Saihu Liao

Corresponding Author

Prof. Dr. Saihu Liao

Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), College of Chemistry, Fuzhou University, Fuzhou, 350108 China

Beijing National Laboratory for Molecular Sciences, Beijing, 100190 China

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First published: 02 November 2021
Citations: 76

Graphical Abstract

The generation of FSO2 radicals under electrochemical conditions is reported. Various sulfonyl fluorides and heterocycles, including a novel oxathiazole dioxide heterocycle, can be obtained in good to excellent yields. Some β-keto sulfonyl fluorides and derivatives showed potent activities against Bursaphelenchus xylophilus and Colletotrichum gloeosporioides.

Abstract

Radical fluorosulfonylation is emerging as an appealing approach for the synthesis of sulfonyl fluorides, which have widespread applications in many fields, in particular in the context of chemical biology and drug development. Here, we report the first investigation of FSO2 radical generation under electrochemical conditions, and the establishment of a new and facile approach for the synthesis of β-keto sulfonyl fluorides via oxo-fluorosulfonylation of alkynes with sulfuryl chlorofluoride as the radical precursor and air as the oxidant. This electrochemical protocol is amenable to access two different products (β-keto sulfonyl fluorides or α-chloro-β-keto sulfonyl fluorides) with the same reactants. The β-keto sulfonyl fluoride products can be utilized as useful building blocks in the synthesis of various derivatives and heterocycles, including the first synthesis of an oxathiazole dioxide compound. Furthermore, some β-keto sulfonyl fluorides and derivatives exhibited notably potent activities against Bursaphelenchus xylophilus and Colletotrichum gloeosporioides.

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