title: Individual stereoisomers of phosphinic dipeptide inhibitor of leucine aminopeptidase.
abstract: Individual stereoisomers of the phosphinic pseudodipeptide hPhepsi[P(O)(OH)CH(2)]Phe were obtained by stereoselective liquid chromatographic separation as N- and C-terminally protected derivative on quinidine carbamate modified silica stationary phase. The stereoisomeric purity, exceeding 95% for each fraction, was determined before and after deprotection using two independent methods. The absolute configuration was rationally assigned by application of enantiomerically pure phosphinic acid substrates in the synthetic procedure and correlation with biological activity of the products. Substantial differences in inhibition of leucine aminopeptidase by the individual isomers revealed novel insights into potency of the recently developed and remarkably effective compound.
authors.affiliation: Department of Bioorganic Chemistry, Faculty of Chemistry, Wrocław University of Technology, Wybrzeze Wyspiańskiego 27, 50-370 Wrocław, Poland. artur.mucha@pwr.wroc.pl
authors.forename: Artur
authors.initials: A
authors.lastname: Mucha
authors.forename: Michael
authors.initials: M
authors.lastname: Lämmerhofer
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Lindner
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Pawełczak
authors.forename: Paweł
authors.initials: P
authors.lastname: Kafarski
mesh_terms: D004151:Dipeptides / Q000737:chemistry* / Q000494:pharmacology; D007931:Leucyl Aminopeptidase / Q000037:antagonists & inhibitors*; D015394:Molecular Structure; D010721:Phosphinic Acids / Q000737:chemistry* / Q000494:pharmacology; D013237:Stereoisomerism
chemical_list: D004151:Dipeptides; D010721:Phosphinic Acids; D007931:Leucyl Aminopeptidase