Issue 34, 2025

Visible-light-induced meta-selective sulfonylation of pyridine via an EDA complex

Abstract

Pyridine is a versatile structural unit found in a broad spectrum of pharmaceuticals, agrochemicals, and materials. Achieving selective meta-functionalization under mild conditions remains challenging due to its inherent electronic properties. In this work, we accomplished a photoinduced method for meta-selective sulfonylation of pyridines, facilitated by an electron donor–acceptor (EDA) complex between iodide ions and sulfonyl chlorides. The reaction proceeds via an oxazino-pyridine intermediate, with sulfonyl chloride acting as the sulfonyl radical precursor. This protocol stands out for its mild, photocatalyst-free conditions, high C5-selectivity, and good scalability, offering a promising approach for the synthesis of meta-sulfonylated pyridines.

Graphical abstract: Visible-light-induced meta-selective sulfonylation of pyridine via an EDA complex

Supplementary files

Article information

Article type
Communication
Submitted
10 Feb 2025
Accepted
27 Mar 2025
First published
03 Apr 2025

Chem. Commun., 2025,61, 6368-6371

Visible-light-induced meta-selective sulfonylation of pyridine via an EDA complex

Y. Ye, Z. Ye, M. Guo, X. He, C. Huang, H. Xiang, K. Chen and H. Yang, Chem. Commun., 2025, 61, 6368 DOI: 10.1039/D5CC00725A

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