Synthesis of oligosaccharide fragments of the rhamnogalacturonan of Nerium indicum

- Synthesis of well-defined Nerium indicum RG-I fragments for the first time.
- New method for the introduction of α-linked galacturonic acid moieties reported.
- Highly stereoselective formation of α-d-GalA-linkage with GalA N-PTFAI donors.