Volume 64, Issue 24 e202502131
Research Article

Rhodium-Catalyzed Atroposelective Synthesis of Axially Chiral 1-Aryl Isoquinolines via De Novo Isoquinoline Formation

Bo-Bo Gou

Bo-Bo Gou

New Cornerstone Science Laboratory, State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032 China

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Wen-Jie Shen

Wen-Jie Shen

New Cornerstone Science Laboratory, State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032 China

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Yuan-Jun Gao

Corresponding Author

Yuan-Jun Gao

New Cornerstone Science Laboratory, State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032 China

E-mail: [email protected]; [email protected]

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Qing Gu

Qing Gu

New Cornerstone Science Laboratory, State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032 China

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Shu-Li You

Corresponding Author

Shu-Li You

New Cornerstone Science Laboratory, State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032 China

E-mail: [email protected]; [email protected]

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Dedicated to Professor Xue-Long Hou on the occasion of his 70th birthday

First published: 03 April 2025
Citations: 2

Graphical Abstract

A highly efficient synthesis of axially chiral 1-aryl isoquinolines through rhodium-catalyzed C─H activation/annulation of aromatic imines with alkynes is reported. An enantioselective de novo isoquinoline ring formation is involved in this process. Detailed experimental and theoretical studies revealed the turnover-limiting step of the reaction and the origin of enantioselectivity.

Abstract

Axially chiral heterobiaryl moieties serve as core skeletons for bioactive molecules, chiral ligands, and organocatalysts. Enantioselective de novo formation of the heteroaromatic ring is one of the most straightforward approaches to access enantioenriched heterobiaryls. Herein, an enantioselective de novo construction of isoquinolines by rhodium-catalyzed C─H activation/annulation of aromatic imines with alkynes is disclosed. This approach is operationally simple, allowing for rapid access to a variety of axially chiral 1-aryl isoquinolines in excellent yields and enantioselectivity (up to 98% yield and 99:1 er). The synthetic application of the current method was demonstrated by functional group transformations and suitability for millimolar-scale reactions. Detailed experimental and theoretical studies revealed the turnover-limiting step and provided insight into the origin of the enantioselectivity for this reaction.

Conflict of Interests

The authors declare no conflict of interest.

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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