Synthesis of C-disaccharides from C-formyl glycosides

Article abstract of DOI:10.1016/0040-4039(96)01667-X

The coupling between C-formyl 2,3:5,6-di-O-isopropylidene-D-mannofuranoside (1) and 2,3,4,6-tetra-O-benzyl-D-galactopyranoside (2) with the protected galactose 6-phosphorane 3 leads to the corresponding olefins which upon hydrogenolysis give β (1 → 6')-li