title: The impact of polystyrene resins in solid-phase organic synthesis.
abstract: A major objective of the DIVERSOMER technology is to provide pure and characterized compounds for biological testing in order to prevent 'false negatives' in our libraries. On several occasions, analysis of the final products by 1H-NMR and MS, has revealed by-products from the polystyrene solid support. Subsequently, three alternative methods were studied to remove polystyrene by-products; (i) prewashing of the resin prior to execution of the synthesis; (ii) pretreatment of the resin with the cleavage conditions consistent with the solid-phase synthesis reaction scheme; and (iii) parallel purification.
authors.affiliation: Parke-Davis Pharmaceutical Research, Division of Warner-Lambert Company, Ann Arbor, MI 48105, USA.
authors.forename: A A
authors.initials: AA
authors.lastname: MacDonald
authors.forename: S H
authors.initials: SH
authors.lastname: Dewitt
authors.forename: S
authors.initials: S
authors.lastname: Ghosh
authors.forename: E M
authors.initials: EM
authors.lastname: Hogan
authors.forename: L
authors.initials: L
authors.lastname: Kieras
authors.forename: A W
authors.initials: AW
authors.lastname: Czarnik
authors.forename: R
authors.initials: R
authors.lastname: Ramage
mesh_terms: D002625:Chemistry, Organic / Q000379:methods; D019020:Directed Molecular Evolution / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011137:Polystyrenes / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry
chemical_list: D011137:Polystyrenes; D012117:Resins, Synthetic