Stereoselective synthesis of C1-C5 and C4-C5 linked deoxy disaccharides via a ring closing metathesis protocol

The stereoselective synthesis of C-C linked deoxy disaccharides by a short and efficient route is described. A RCM strategy is adopted for the assembly of the required ring skeleton on the sugar chiron, while cis-dihydroxylation was used to introduce the vic-diol.