Volume 62, Issue 38 e202309256
Communication

Asymmetric Dearomatization of Phenols via Ligand-Enabled Cooperative Gold Catalysis

Dr. Yongliang Zhang

Dr. Yongliang Zhang

Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106 USA

These authors contributed equally to this work.

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Ke Zhao

Ke Zhao

Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106 USA

These authors contributed equally to this work.

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Xinyi Li

Xinyi Li

Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106 USA

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Carlos D. Quintanilla

Carlos D. Quintanilla

Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106 USA

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Prof. Dr. Liming Zhang

Corresponding Author

Prof. Dr. Liming Zhang

Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106 USA

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First published: 28 July 2023
Citations: 6

Graphical Abstract

Asymmetric dearomatization of phenols was achieved by employing chiral bifunctional phosphine ligands in cooperative gold catalysis. This transformation demonstrated a remarkable generality, affording the desired product with high yields (up to 99 %) and excellent enantioselectivities (ee up to 99 %).

Abstract

By employing a chiral bifunctional phosphine ligand, a gold(I)-catalyzed efficient and highly enantioselective dearomatization of phenols is achieved via versatile metal-ligand cooperation. The reaction is proven to be remarkably general in scope, permitting substitutions at all four remaining benzene positions, accommodating electron-withdrawing groups including strongly deactivating nitro, and allowing carbon-based groups of varying steric bulk including tert-butyl at the alkyne terminus. Moreover, besides N-(o-hydroxyphenyl)alkynamides, the corresponding ynoates and ynones are all suitable substrates. Spirocyclohexadienone-pyrrol-2-ones, spirocyclohexadienone-butenolides, and spirocyclohexadenone-cyclopentenones are formed in yields up to 99 % and with ee up to 99 %.

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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