Fast chiral separation by ligand-exchange HPLC using a dynamically coated monolithic column.
The preparation and application of dynamically coated ligand-exchange chromatography phases for enantioseparation is described. The phases were prepared by pumping a solution of N-decyl-L-4-hydroxyproline, N-hexadecyl-L-4-hydroxyproline, or N-2-hydroxydodecyl-L-4-hydroxyproline through a commercially available monolithic RP-18 column. These coatings are stable against desorption for months at ambient temperature when aqueous mobile phases are used. The columns were applied to the chiral separation of amino acids, glycyl dipeptides and diastereomeric dipeptides, and tripeptides. The chiral selector can be removed or changed easily by washing the column with ACN or methanol. Ultrafast separations in the range of seconds were achieved using high flow rates.
Schmid
Martin G
MG
Department of Pharmaceutical Chemistry, Institute of Pharmaceutical Sciences, Karl-Franzens-University, Graz, Austria. martin.schmid@uni-graz.at
Schreiner
Karin
K
Reisinger
Daniela
D
Gübitz
Gerald
G
D000596:Amino Acids / Q000737:chemistry / Q000302:isolation & purification; D002853:Chromatography, Liquid / Q000295:instrumentation / Q000379:methods*; D006909:Hydroxyproline / Q000138:chemical synthesis / Q000737:chemistry; D008024:Ligands; D008422:Materials Testing; D015394:Molecular Structure; D010455:Peptides / Q000737:chemistry / Q000302:isolation & purification; D013237:Stereoisomerism
D000596:Amino Acids; D008024:Ligands; D010455:Peptides; D006909:Hydroxyproline