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Title:Enantioselective Adsorption of 1,3-Dithiolane-1-Oxides and Related Compounds on Liquid Chromatographic Amino Acid-Derived Chiral Stationary Phases (Resolution, Enantiomers, Sulfoxides)
Author(s):Hamper, Bruce Cameron
Department / Program:Chemistry
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Chemistry, Organic
Abstract:Chiral stationary phases derived from N-3,5-dinitrobenzoyl amino acids such as (R)-phenylglycine, (S)-leucine, (S)-phenylalanine and (S)-valine bonded to aminopropyl silanized silica are employed for preparative and analytical liquid chromatographic separation of the enantiomers of 1,3-dithiolane-1-oxides and related compounds. The structure-enantioselectivity relationships allow determination of two fundamental chiral recognition models for resolution of enantiomeric analytes which, in turn, allow assignment of the absolute configuration of many cyclic sulfoxides on the basis of chromatographic elution order. Confirmation of these assignments is provided by circular dichroism spectroscopy, NMR spectroscopy in the presence of a chiral solvating agent and preparation of chiral sulfoxides from compounds of known absolute configuration. The chiral recognition models are useful for determining the essential functionality required for enantioselective adsorbtion to occur and may be employed for assignment of absolute configuration of many classes of compounds. Lacinilene C and lacinilene C methyl ether are chromatographically resolved and the absolute configurations determined by chromatographic elution order, circular dichroism and NMR spectroscopy in the presence of chiralsolvating agents.
Issue Date:1984
Description:197 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1984.
Other Identifier(s):(UMI)AAI8502162
Date Available in IDEALS:2014-12-15
Date Deposited:1984

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