Carbene-catalyzed chirality-controlled site-selective acylation of saccharides

Ying-Guo Liu (), Zetao Zhong, Yuyang Tang, Hongling Wang, Sai Vikrama Chaitanya Vummaleti, Xi Peng, Peng Peng, Xinglong Zhang () and Yonggui Robin Chi ()
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Ying-Guo Liu: Zhengzhou University
Zetao Zhong: Zhengzhou University
Yuyang Tang: Zhengzhou University
Hongling Wang: Nanyang Technological University
Sai Vikrama Chaitanya Vummaleti: The Chinese University of Hong Kong, Shatin
Xi Peng: Zhengzhou University
Peng Peng: Shandong University
Xinglong Zhang: The Chinese University of Hong Kong, Shatin
Yonggui Robin Chi: Nanyang Technological University

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Acylation stands as a fundamental process in both biological pathways and synthetic chemical reactions, with acylated saccharides and their derivatives holding diverse applications ranging from bioactive agents to synthetic building blocks. A longstanding objective in organic synthesis has been the site-selective acylation of saccharides without extensive pre-protection of alcohol units. In this study, we demonstrate that by simply altering the chirality of N-heterocyclic carbene (NHC) organic catalysts, the site-selectivity of saccharide acylation reactions can be effectively modulated. Our investigation reveals that this intriguing selectivity shift stems from a combination of factors, including chirality match/mismatch and inter- / intramolecular hydrogen bonding between the NHC catalyst and saccharide substrates. These findings provide valuable insights into catalyst design and reaction engineering, highlighting potential applications in glycoside analysis, such as fluorescent labelling, α/β identification, orthogonal reactions, and selective late-stage modifications.

Date: 2025
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DOI: 10.1038/s41467-024-55282-y

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