Volume 137, Issue 9 e202425634
Zuschrift

Electrochemical Cyclopropanation of Unactivated Alkenes with Methylene Compounds

Min Liu

Min Liu

State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, Haihe Laboratory of Sustainable Chemical Transformations, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071 China

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Yanwei Wang

Yanwei Wang

State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, Haihe Laboratory of Sustainable Chemical Transformations, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071 China

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Chao Gao

Chao Gao

State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, Haihe Laboratory of Sustainable Chemical Transformations, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071 China

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Jingpei Jia

Jingpei Jia

State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, Haihe Laboratory of Sustainable Chemical Transformations, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071 China

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Zile Zhu

Zile Zhu

State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, Haihe Laboratory of Sustainable Chemical Transformations, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071 China

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Prof. Dr. Youai Qiu

Corresponding Author

Prof. Dr. Youai Qiu

State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, Haihe Laboratory of Sustainable Chemical Transformations, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071 China

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First published: 24 January 2025

Abstract

Cyclopropanes are prevalent in natural products, pharmaceuticals, and bioactive compounds, functioning as a significant structural motif. Although a series of methods have been developed for the construction of the cyclopropane skeleton, the development of a direct and efficient strategy for the rapid synthesis of cyclopropanes from bench-stable starting materials with a broad substrate scope and functional group tolerance remains challenging and highly desirable. Herein, we present an electrochemical method for the direct cyclopropanation of unactivated alkenes using active methylene compounds. The strategy shows a broad substrate scope with a high level of functional group compatibility, as well as potential application as demonstrated by late-stage cyclopropanation of complex molecules and drug derivatives. Further mechanistic investigations suggest that Cp2Fe (Fc) plays an essential role as an oxidative mediator in generating radicals from active methylene compounds.

Data Availability Statement

Materials and methods, optimization studies, experimental procedures, mechanistic studies, 1H NMR, 13C NMR and 19F NMR spectra, and high-resolution mass spectrometry data are available in the Supporting Information. Deposition Number 2402258 (for 49) contains the supplementary crystallographic data for this paper. These data are provided free of charge by the joint Cambridge Crystallographic Data Centre and Fachinformationszentrum Karlsruhe Access Structures service.

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