title: Synthesis and characterization of 2-O-beta-lactosylglycerol, 1,2-di-O-beta-lactosyl-(R,S)-glycerols, and 1,2,3,-tri-O-beta-lactosylglycerol.
abstract: The reaction of 2,3,6,2',3',4',6'-hepta-O-acetyl-alpha-lactosyl bromide (5) and 1,3-di-O-benzylglycerol in the presence of mercury(II) cyanide in benzene-nitromethane afforded 1,3-di-O-benzyl-2-O-(2,3,6,2',3',4',6'-hepta-O-acetyl-beta-lactosyl)glyc erol (70%), which was converted into 2-O-beta-lactosylglycerol. 1,2-Di-O-beta-lactosyl-(R,S)-glycerols were obtained by way of the coupling of 5 to either 1-O-benzyl-(R,S)-glycerol or 1-O-benzyl-2-O-(2,3,6,2',3',4',6'-hepta-O-acetyl-beta-lactosyl)-(R,S)-gl ycerols. The most efficient route to 1,2, 3-tri-O-beta-lactosylglycerol (17) involved treatment of 2-O-(2,3,6,2',3',4',6'-hepta-O-acetyl-beta-lactosyl)glycerol with 3 mol. equiv. of 5 followed by removal of the blocking groups, to give 17 (47%).
authors.affiliation: Department of Chemistry, Queen's University, Kingston, Ontario, Canada.
authors.forename: L J
authors.initials: LJ
authors.lastname: Hronowski
authors.forename: W A
authors.initials: WA
authors.lastname: Szarek
authors.forename: G W
authors.initials: GW
authors.lastname: Hay
authors.forename: A
authors.initials: A
authors.lastname: Krebs
authors.forename: W T
authors.initials: WT
authors.lastname: Depew
mesh_terms: D002240:Carbohydrate Sequence; D005990:Glycerol / Q000737:chemistry*; D007785:Lactose / Q000737:chemistry*; D008969:Molecular Sequence Data; D011956:Receptors, Cell Surface / Q000378:metabolism
chemical_list: D011956:Receptors, Cell Surface; C039707:galactose receptor; D007785:Lactose; D005990:Glycerol