Volume 61, Issue 44 e202212201
Communication

Photocatalyzed Cascade Reactions of Cyclopropanols and α-Trifluoromethyl-Substituted Olefins for the Synthesis of Fused gem-Difluorooxetanes

Dr. Yunxiao Zhang

Dr. Yunxiao Zhang

Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072 China

These authors contributed equally to this work.

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Yunhong Niu

Yunhong Niu

Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072 China

These authors contributed equally to this work.

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Youyuan Guo

Youyuan Guo

Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072 China

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Jiaxin Wang

Jiaxin Wang

Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072 China

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Yizhi Zhang

Yizhi Zhang

Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072 China

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Dr. Shanshan Liu

Dr. Shanshan Liu

Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072 China

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Prof. Dr. Xiao Shen

Corresponding Author

Prof. Dr. Xiao Shen

Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072 China

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First published: 16 September 2022
Citations: 53

Graphical Abstract

A combination of photoredox catalysis and energy transfer catalysis/direct photo-excitation enables cascade reactions of cyclopropanols and α-CF3-olefins, in which two rings and three bonds are constructed in one reaction, affording fused gem-difluorooxetanes. The reaction shows broad substrate scope, complete cis-selectivity, and downstream transformations of the products demonstrated the synthetic potential.

Abstract

Fluorinated fused rings are challenging to construct from simple starting materials. Herein, we report the first photocatalyzed cascade reactions of readily available cyclopropanols and α-trifluoromethyl-substituted olefins for the synthesis of fused gem-difluorooxetanes. Two rings and three bonds were efficiently constructed in one reaction. The reaction showed broad substrate scope and the downstream transformations of the products demonstrated the synthetic potential of the reaction. The mechanistic study supported the presence of cascade photoredox catalysis and energy transfer catalysis/direct photo-excitation processes.

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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