Volume 63, Issue 24 e202401359
Research Article

Controllable Skeletal and Peripheral Editing of Pyrroles with Vinylcarbenes

Yong Yang

Yong Yang

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

These authors contributed equally to this work.

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Qingmin Song

Qingmin Song

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

These authors contributed equally to this work.

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Dr. Paramasivam Sivaguru

Dr. Paramasivam Sivaguru

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

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Dr. Zhaohong Liu

Corresponding Author

Dr. Zhaohong Liu

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

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Dan Shi

Dan Shi

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

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Tian Tian

Tian Tian

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

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Graham de Ruiter

Graham de Ruiter

Schulich Faculty of Chemistry, Technion—Israel Institute of Technol-ogy Technion City, 3200008 Haifa, Israel

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Prof. Xihe Bi

Corresponding Author

Prof. Xihe Bi

Department of Chemistry, Northeast Normal University, Changchun, 130024 China

State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071 China

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First published: 10 April 2024
Citations: 22

Graphical Abstract

A highly controllable molecular editing strategy of pyrroles was achieved by using trifluoromethyl vinyl N-triftosylhydrazones as vinylcarbene precursors, which led to the first dearomative single-atom skeletal editing of pyrroles through carbon-atom insertion, as well as three types of peripheral editing reactions: α- or γ-selective C−H insertion, and [3+2] cycloaddition.

Abstract

The skeletal editing of azaarenes through insertion, deletion, or swapping of single atoms has recently gained considerable momentum in chemical synthesis. Here, we describe a practical skeletal editing strategy using vinylcarbenes in situ generated from trifluoromethyl vinyl N-triftosylhydrazones, leading to the first dearomative skeletal editing of pyrroles through carbon-atom insertion. Furthermore, depending on the used catalyst and substrate, three types of peripheral editing reactions of pyrroles are also disclosed: α- or γ-selective C−H insertion, and [3+2] cycloaddition. These controllable molecular editing reactions provide a powerful platform for accessing medicinally relevant CF3-containing N-heterocyclic frameworks, such as 2,5-dihydropyridines, piperidines, azabicyclo[3.3.0]octadienes, and allylated pyrroles from readily available pyrroles. Mechanistic insights from experiments and density functional theory (DFT) calculations shed light on the origin of substrate- or catalyst-controlled chemo- and regioselectivity as well as the reaction mechanism.

Conflict of interests

The authors declare no conflict of interest.

Data Availability Statement

Data supporting the findings of this study are available in the Supporting Information of this article.

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