A comparative study of NMR chemical shifts of sparteine thiolactams and lactams |
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| Authors: | Renata Kolano?Waleria Wysocka Tadeusz Brukwicki |
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| Affiliation: | Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, Poznań, Poland |
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| Abstract: | The 13C and 1H NMR spectra of the four possible thiolactams of sparteine (1) were recorded and the thiolactam group effects were determined. Most of the effects are greater than those of the lactam group in the oxo analogs. A good linear correlation between the 13C chemical shifts of CS and those of CO was found. The effects could help in assignment of the spectra and determination of conformation of thiolactams and related thiocarbonyl compounds. |
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| Keywords: | bis-quinolizidine alkaloids 13C NMR 1H NMR conformation 13C and 1H NMR effects of thiocarbonyl group |
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