Dual Gold/Silver Catalysis: 3-Alkynylpyrroles via a Tandem C(sp <sup>2</sup> )–H Alkynylation/N-Alkynylation

)-H alkynylation/N-alkynylation of enamines with hypervalent iodine(III) reagents for the synthesis of 3-alkynylpyrroles is reported. This cooperative Au/Ag catalytic system enables the one-step construction of multisubstituted pyrrole frameworks under mild conditions. Mechanistic studies allowed the capture of the initially formed Au(I) species and support a pathway involving an alkynyl Au(III) intermediate together with a silver-assisted C-H activation process. The cascade sequence efficiently forges C-C and C-N bonds, providing 3-alkynylpyrroles in good yields with broad functional group tolerance. Gram-scale synthesis and further derivatization of the products highlight the practicality and synthetic utility of this transformation.

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Publication Details

Journal
Organic Letters
Published
2026-05-23
DOI
https://doi.org/10.1021/acs.orglett.6c01692
Primary Topic
Catalytic Alkyne Reactions
Type
article
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article

Dual Gold/Silver Catalysis: 3-Alkynylpyrroles via a Tandem C(sp 2 )–H Alkynylation/N-Alkynylation

Peng Shen, Jie Yang, Chunyu Han, Rui Qin et al.
Organic Letters
Catalytic Alkyne Reactions
article

Dual Gold/Silver Catalysis: 3-Alkynylpyrroles via a Tandem C(sp 2 )–H Alkynylation/N-Alkynylation

Peng Shen, Jie Yang, Chunyu Han, Rui Qin, Mengyu Liu, Peifeng Li
article en

Abstract

)-H alkynylation/N-alkynylation of enamines with hypervalent iodine(III) reagents for the synthesis of 3-alkynylpyrroles is reported. This cooperative Au/Ag catalytic system enables the one-step construction of multisubstituted pyrrole frameworks under mild conditions. Mechanistic studies allowed the capture of the initially formed Au(I) species and support a pathway involving an alkynyl Au(III) intermediate together with a silver-assisted C-H activation process. The cascade sequence efficiently forges C-C and C-N bonds, providing 3-alkynylpyrroles in good yields with broad functional group tolerance. Gram-scale synthesis and further derivatization of the products highlight the practicality and synthetic utility of this transformation.

Organic Letters
CAS Key Laboratory of Urban Pollutant Conversion (CN), Hubei Normal University (CN)
Openalex Percentile: Top 9%
Catalytic Alkyne Reactions
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