A robust synthesis of N-glycolyl muramyl dipeptide via azidonitration/reduction

Org Biomol Chem. 2015 Feb 7;13(5):1515-20. doi: 10.1039/c4ob02147a.

Abstract

A novel synthetic route leading to N-glycolyl muramyl dipeptide (MDP), a bacterial glycopeptide of particular interest in studies of nucleotide-binding oligomerization domain-containing protein 2 (NOD2), is described. The synthetic strategy hinges on the alkylation of benzylidene-protected glucal with 2-bromopropionic acid and thus circumvents a challenging and non-reproducible SN2 step at the C-3 position of glucosamine derivatives. The subsequent sequence includes an azidonitration and an unusual azide reduction/acylation step via an aza ylide/oxaphospholidine intermediate. This approach generates a protected N-glycolyl MDP that can be either subjected to a one-step global deprotection or differentially deprotected to obtain further derivatives.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetylmuramyl-Alanyl-Isoglutamine / chemical synthesis*
  • Acetylmuramyl-Alanyl-Isoglutamine / chemistry*
  • Alkylation
  • Azides / chemistry*
  • Chemistry Techniques, Synthetic
  • Oxidation-Reduction

Substances

  • Azides
  • Acetylmuramyl-Alanyl-Isoglutamine