Volume 62, Issue 36 e202307251
Research Article

[2+2+1+1] Cycloaddition for de novo Synthesis of Densely Functionalized Phenols

Dr. Wei Wei

Dr. Wei Wei

Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

These authors contributed equally to this work.

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Ka Key Cheung

Ka Key Cheung

Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

These authors contributed equally to this work.

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Dr. Ran Lin

Dr. Ran Lin

Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002 China

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Lam Cheung Kong

Lam Cheung Kong

Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

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Ka Lok Chan

Ka Lok Chan

Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

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Dr. Herman H. Y. Sung

Dr. Herman H. Y. Sung

Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

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Prof. Dr. Ian D. Williams

Corresponding Author

Prof. Dr. Ian D. Williams

Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

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Prof. Dr. Rongbiao Tong

Corresponding Author

Prof. Dr. Rongbiao Tong

Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

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Prof. Dr. Zhenyang Lin

Corresponding Author

Prof. Dr. Zhenyang Lin

Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

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Prof. Dr. Guochen Jia

Corresponding Author

Prof. Dr. Guochen Jia

Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

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First published: 10 July 2023
Citations: 1

Graphical Abstract

Densely functionalized phenols can be easily obtained through formal [2+2+1+1] cycloaddition of two different alkynes and two molecules of CO. The new benzannulation strategy allows efficient regioselective installation of up to five different substituents on a phenol ring. The resulting phenols have a substitution pattern different from and complementary to those obtained from Dötz and Danheiser benzannulations.

Abstract

A unique benzannulation strategy for regioselective de novo synthesis of densely functionalized phenols is described. Through metal-mediated formal [2+2+1+1] cycloaddition of two different alkynes and two molecules of CO, a series of densely functionalized phenols were obtained. The benzannulation strategy allows efficient regioselective installation up to five different substituents on a phenol ring. The resulting phenols have a substitution pattern different from those obtained from Dötz and Danheiser benzannulations.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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