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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Two new, single-isomer, sulfated β-cyclodextrins for use as chiral resolving agents for enantiomer separations in capillary electrophoresis

Busby, Michael Brent 16 August 2006 (has links)
Two novel, single-isomer, sulfated cyclodextrins, the sodium salts of heptakis(2- O-methyl-3-O-acetyl-6-O-sulfo)cyclomaltoheptaose (HMAS) and heptakis(2-O-methyl- 6-O-sulfo)cyclomaltoheptaose (HMS) were used as chiral resolving agents in both aqueous and non-aqueous electrophoretic separation of a set of pharmaceutically active weak base enantiomers. Enantiomers of twenty one of the twenty four weak bases were baseline resolved in one or more of the background electrolytes (BGE’s) used. An eight-step synthetic method was used to produce, on a large scale, the title compounds in greater than 97% purity. The purity of the synthetic intermediates and the final products were characterized by HPLC-ELSD and indirect UV-detection capillary electrophoresis (CE), respectively. X-ray crystallography, MALDI-TOF mass spectrometry and 1H as well as 13C NMR spectroscopy allowed for unambiguous characterization of the structure of each intermediate and the final product.

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