Efficient synthesis of building blocks for branched rhamnogalacturonan I fragments

Highlight
- N-Phenyl trifluoroacetimidate (13) is a a new galacturonate glycosyl donor.
- This new donor was synthesized directly from d-galacturonic acid.
- N-Phenyl trifluoroacetimidate (13) was completely characterized by NMR data.
- The new donor provided an excess to a branched rhamnogalcturonate I building block.