title: Endogenous alkaloids in man. XI. Analysis of glyoxylate-derived 1,3-thiazolidines by ion-pair-assisted reversed-phase chromatography.
abstract: Reversed-phase ion-pair chromatography, using cetyltrimethyl ammonium hydrogensulphate as detergent, has been applied to the analysis of the highly polar glyoxylate-derived 1,3-thiazolidines 1, 2 and 3. On the base of this high-performance liquid chromatographic separation of the diastereomeric compounds 1a/b and 3a/b was achieved. Removal of the hydrophobic couterion by precipitation as its insoluble iodide, followed by an extraction with chloroform, seems to be a promising first step to establish ion-pair-assisted chromatography as a preparative high-performance liquid chromatographic method for the isolation of polar compounds.
authors.affiliation: Institute of Organic Chemistry, University of Würzburg, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Bringmann
authors.forename: C
authors.initials: C
authors.lastname: Hesselmann
authors.forename: D
authors.initials: D
authors.lastname: Feineis
mesh_terms: D000470:Alkaloids / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D006801:Humans; D007477:Ions; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet; D013844:Thiazoles / Q000032:analysis*
chemical_list: D000470:Alkaloids; D007477:Ions; D013844:Thiazoles