Synthesis, separation, and characterization of amphiphilic sulfated oligosaccharides enabled by reversed-phase ion pairing LC and LC-MS methods.
Synthesis of amphiphilic oligosaccharides is problematic because traditional methods for separating and purifying oligosaccharides, including sulfated oligosaccharides, are generally not applicable to working with amphiphilic sugars. We report here RPIP-LC and LC-MS methods that enable the synthesis, separation, and characterization of amphiphilic N-arylacyl O-sulfonated aminoglycosides, which are being pursued as small-molecule glycosaminoglycan mimics. The methods described in this work for separating and characterizing these amphiphilic saccharides are further applied to a number of uses: monitoring the progression of sulfonation reactions with analytical RP-HPLC, characterizing sulfate content for individual molecules with ESI-MS, determining the degree of sulfation for products having mixed degrees of sulfation with HPLC and LC-MS, and purifying products with benchtop C18 column chromatography. We believe that the methods described here will be broadly applicable to enabling the synthesis, separation, and characterization of amphiphilic, sulfated, and phosphorylated oligosaccharides and other types of molecules substituted to varying degrees with both anionic and hydrophobic groups.
Division of Medicinal and Natural Products Chemistry, University of Iowa, Iowa City, IA 52242, USA.
Amanda M
AM
Fenner
Robert J
RJ
Kerns
D002851:Chromatography, High Pressure Liquid; D056148:Chromatography, Reverse-Phase; D007612:Kanamycin / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000302:isolation & purification; D009328:Nebramycin / Q000031:analogs & derivatives; D009355:Neomycin / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000302:isolation & purification; D021241:Spectrometry, Mass, Electrospray Ionization; D013463:Sulfuric Acid Esters / Q000138:chemical synthesis* / Q000737:chemistry / Q000302:isolation & purification
D013463:Sulfuric Acid Esters; D009328:Nebramycin; C011666:apramycin; D007612:Kanamycin; D009355:Neomycin