Synthesis 2021; 53(19): 3613-3620
DOI: 10.1055/s-0037-1610777
paper

Synthesis of Pentasaccharide Repeating Unit Corresponding to the Cell Wall O-Polysaccharide of Salmonella enterica O55 Strain Containing a Rare Sugar 3-Acetamido-3-deoxy-d-fucose

Arin Gucchait
,
Monalisa Kundu
,
Anup Kumar Misra
A.G. and M.K. thank Council of Scientific and Industrial Research, New Delhi, India (CSIR) for providing senior research fellowships. This work was supported by Science and Engineering Research Board (SERB), New Delhi (Project No. CRG/2019/000352 dated 23.01.2020) (A.K.M.).


Abstract

A pentasaccharide repeating unit corresponding to the cell wall O-antigen of Salmonella enterica O55 containing a rare sugar, 3-acetamido-3-deoxy-d-fucose has been synthesized as its p-methoxyphenyl glycoside using a sequential stereoselective glycosylation strategy. A suitably functionalized 3-azido-3-deoxy-d-fucose thioglycoside derivative was prepared in very good yield and used in the stereoselective glycosylation reaction. Functionalized monosaccharide intermediates were prepared judiciously and stereoselectively assembled to get the desired pentasaccharide derivative in excellent yield.

Supporting Information



Publication History

Received: 24 April 2021

Accepted after revision: 31 May 2021

Article published online:
24 June 2021

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