## Abstract The natural abundance ^13^C magnetic resonance spectra of reduced proaporphines are reported, with complete assignments based on peak multiplicity and empirical calculations of chemical shifts. The chemical shift values of Cโ8, Cโ12 and Cโ7 are found to be strongly diagnostic of the spi
C-13 magnetic resonance studies of some papaveraceae alkaloids
โ Scribed by Thomas T. Nakashima; Gary E. Maciel
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 871 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0749-1581
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โฆ Synopsis
Abstract
The natural abundance ^13^C magnetic resonance spectra of some Papaveraceae alkaloids have been determined at 22ยท628 MHz employing the pulse Fourier transform technique. Several techniques were employed to aid in spectral assignments and it has been possible to make selfโconsistent assignments for all the resonances for these alkaloids. Evidence is presented for transโannular interaction between the amino group and the carbonyl group situated across the tenโmembered ring.
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