The free bases of eight quaternary benzo[c]phenanthridine alkaloids were investigated by 1H and 13C NMR spectroscopy. The pseudobases (the 6-hydroxy-5,6-dihydro derivatives) were found to be the only products of the alkalization in DMSO-d6 solution. In less polar solvents the formation of the bimolecular aminoacetal structure is preferred. In biological systems, free bases of the alkaloids are assumed to adopt the pseudobase structure.
In Czech
The free bases of eight quaternary benzo[c]phenanthridine alkaloids were investigated by 1H and 13C NMR spectroscopy. The pseudobases (the 6-hydroxy-5,6-dihydro derivatives) were found to be the only products of the alkalization in DMSO-d6 solution. In less polar solvents the formation of the bimolecular aminoacetal structure is preferred. In biological systems, free bases of the alkaloids are assumed to adopt the pseudobase structure.
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LN00A016, research and development project
Name: BIOMOLEKULÁRNÍ CENTRUM
Investor: Ministry of Education, Youth and Sports of the CR, Biomolecular Center