title: Two Synthetic Methods for Preparation of Chiral Stationary Phases Using Crystalline Degradation Products of Vancomycin: Column Performance for Enantioseparation of Acidic and Basic Drugs.
abstract: Two chiral stationary phases (CSPs) based on crystalline degradation products (CDPs) of vancomycin by using different synthetic methods were prepared and compared. Crystalline degradation products of vancomycin were produced by hydrolytic loss of ammonia from vancomycin molecules. Performances of two chiral columns prepared with these degradation products were investigated using several acidic and basic drugs as model analytes. Retention and resolution of these analytes on the prepared columns, as two main parameters, in enantioseparation were studied. The results demonstrated that the stationary phase preparation procedure has a significant effect on the column performance. The resolving powers of prepared columns for enantiomers resolution were changed with the variation in vancomycin-CDP coverage on the silica support. Elemental analysis was used to monitor the surface coverage of silica support by vancomycin-CDP. The results showed that both columns can be successfully applied to chiral separation studies.
authors.affiliation: Department of Chemistry, Faculty of Science, Tarbiat Modares University, Tehran, Iran.
authors.forename: Assem
authors.initials: A
authors.lastname: Abdollahpour
authors.affiliation: Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, PO Box 68149-89468, Khorramabad, Iran. rouhollahheydari@yahoo.com.
authors.forename: Rouhollah
authors.initials: R
authors.lastname: Heydari
authors.affiliation: Department of Chemistry, Razi University, Kermanshah, Iran. mshamsipur@yahoo.com.
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Shamsipur
mesh_terms: D000143:Acids; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003460:Crystallization / Q000379:methods; D006863:Hydrogen-Ion Concentration; D012822:Silicon Dioxide / Q000032:analysis / Q000737:chemistry; D013237:Stereoisomerism; D014640:Vancomycin / Q000032:analysis* / Q000737:chemistry*
chemical_list: D000143:Acids; D014640:Vancomycin; D012822:Silicon Dioxide
keywords: chiral stationary phase; enantioseparation; synthetic method; vancomycin-CDP