"STANDARDIZED INTERMEDIATES" FOR OLIGOSACCHARIDE SYNTHESIS. PRECURSORS OF β-LINKED, INTERIOR D-GALACTOPYRANOSE UNITS HAVING CHAIN EXTENSION AT POSITION 4, OR POSITIONS 4 AND 2

Article abstract of DOI:10.1016/S0008-6215(00)80851-4

Allyl 6-O-benzyl-3,4-O-isopropylidene-α-D-galactopyranoside (1) was used to prepare a series of 2-O-benzoyl-3,6-di-O-benzyl-α-D-galactopyranosyl halides carrying either a second benzoyl group (11, 17a) or a selectively removable, temporary protecting grou