Synlett
DOI: 10.1055/a-2301-2358
letter
Carbohydrate Chemistry in China

Stereocontrolled Synthesis of a Heptose- and Kdo-Containing Common Inner-Core Trisaccharide of Lipopolysaccharides from Multiple Pathogenic Bacteria

Jiawei Li
a   School of Chinese Materia Medica, Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing 210023, P. R. of China
b   State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. of China
,
Runing Gao
a   School of Chinese Materia Medica, Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing 210023, P. R. of China
b   State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. of China
,
Tianhui Hao
b   State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. of China
c   University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, P. R. of China
,
Tiehai Li
a   School of Chinese Materia Medica, Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing 210023, P. R. of China
b   State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. of China
c   University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, P. R. of China
› Author Affiliations
Financial support from the National Natural Science Foundation of China (22077130 and 22377134) and Shanghai Municipal Science and Technology Major Project is acknowledged.


Abstract

Lipopolysaccharides (LPSs) are major virulence determinants in Gram-negative bacteria and are responsible for many pathophysiological processes during bacterial infections. However, the accessibility of LPS-associated oligosaccharides for infectious mechanism study and vaccine development remains challenging. We report an efficient stereocontrolled approach for the synthesis of a common inner-core trisaccharide containing difficult-to-access, rare, higher-carbon sugars: a heptose (Hep) and 3-deoxy-α-d-manno-oct-2-ulosonic acid (Kdo). Key features include comprehensive elaboration of a practical synthesis of versatile Hep and Kdo building blocks, and stereoselective assembly of an inner-core trisaccharide from multiple pathogenic bacteria.

Supporting Information



Publication History

Received: 11 March 2024

Accepted after revision: 06 April 2024

Accepted Manuscript online:
06 April 2024

Article published online:
18 April 2024

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