Volume 137, Issue 8 e202420485
Zuschrift

Accessing Azetidines through Magnesium-Mediated Nitrogen Group Transfer from Iminoiodinane to Donor-Acceptor Cyclopropanes

Dr. Ajay H. Bansode

Dr. Ajay H. Bansode

Department of Chemistry, New York University, New York, New York, 10003 United States

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Lifeng Yin

Lifeng Yin

Department of Chemistry, New York University, New York, New York, 10003 United States

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Ning Deng

Ning Deng

Department of Chemistry, New York University, New York, New York, 10003 United States

Ning Deng and Mahmoud Afrasi contributed to this work equally.

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Mahmoud Afrasi

Mahmoud Afrasi

Department of Chemistry, New York University, New York, New York, 10003 United States

Ning Deng and Mahmoud Afrasi contributed to this work equally.

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Yiyi Zhu

Yiyi Zhu

Department of Teaching and Learning, New York University, New York, New York, 10003 United States

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Prof. Dr. Marvin Parasram

Corresponding Author

Prof. Dr. Marvin Parasram

Department of Chemistry, New York University, New York, New York, 10003 United States

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First published: 07 January 2025

Abstract

Herein, we report a Lewis acid-mediated ring expansion of donor-acceptor cyclopropanes (DACs) to substituted azetidines via nucleophilic nitrogen group transfer from readily accessible iminoiodinane. This protocol operates under mild, transition-metal-free conditions, and showcases excellent chemoselectivity, along with broad functional group tolerance. We report for the first time that challenging alkyl donor-acceptor cyclopropanes can undergo ring expansion leading to aliphatic azetidines without relying on external oxidants or precious transition-metal catalysts. Mechanistically, the coordination of a magnesium (Mg)-Lewis acid to the DAC promotes nucleophilic ring opening with a putative Mg-amide species generated from the iminoiodinane under the reaction conditions to furnish the azetidine products.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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