A Novel Glycosyl Donor with a Triisopropylsilyl Nonparticipating Group in Benzyl-Free Stereoselective 1,2- cis -Galactosylation

Polina I. Abronina, Alexander I. Zinin, Nelly N. Malysheva, Elena V. Stepanova, Alexander O. Chizhov, Vladimir I. Torgov, Leonid O. Kononov

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

A novel glycosyl donor with a triisopropylsilyl (TIPS) nonparticipating group at O-2 is introduced for use in 1,2- cis -galactosylation. Coupling the 2- O -TIPS-substituted thiogalactoside donor with a series of mono- and disaccharide glycosyl acceptors was found to lead exclusively to α-linked oligosaccharides. The observed exceptionally high α-selectivity was interpreted in terms of conformational changes in the glycosyl cation induced by the bulky 2- O -TIPS group.

Original languageEnglish
Pages (from-to)1608-1613
Number of pages6
JournalSynlett
Volume28
Issue number13
DOIs
Publication statusPublished - 14 Aug 2017

Keywords

  • 4-(3-chloropropoxy)phenyl glycosides
  • conformation
  • glycosylation
  • protecting groups
  • stereoselective synthesis
  • stereoselectivity
  • triisopropylsilyl group

ASJC Scopus subject areas

  • Organic Chemistry

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