Volume 131, Issue 40 pp. 14378-14382
Zuschrift

Cyclopropanation of Terminal Alkenes through Sequential Atom-Transfer Radical Addition/1,3-Elimination

Nicholas D. C. Tappin

Nicholas D. C. Tappin

Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland

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Weronika Michalska

Weronika Michalska

Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland

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Dr. Simon Rohrbach

Dr. Simon Rohrbach

Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland

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Prof. Dr. Philippe Renaud

Corresponding Author

Prof. Dr. Philippe Renaud

Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland

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First published: 22 July 2019
Citations: 8

A previous version of this manuscript has been deposited on a preprint server (https://doi.org/10.26434/chemrxiv.8325251.v1).

Abstract

An operationally simple method to affect an atom-transfer radical addition of commercially available ICH2Bpin to terminal alkenes has been developed. The intermediate iodide can be transformed in a one-pot process into the corresponding cyclopropane upon treatment with a fluoride source. This method is highly selective for the cyclopropanation of unactivated terminal alkenes over non-terminal alkenes and electron-deficient alkenes. Due to the mildness of the procedure, a wide range of functional groups such as esters, amides, alcohols, ketones, and vinylic cyclopropanes are well tolerated.

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