Berberine and coptisine free bases

  title={Berberine and coptisine free bases},
  author={J. Dostal and S. Man and Pavl{\'i}na Se{\vc}k{\'a}řov{\'a} and Dagmar Hulov{\'a} and M. Ne{\vc}as and M. Pot{\'a}{\vc}ek and J. Tou{\vs}ek and R. Dommisse and W. V. Dongen and R. Marek},
  journal={Journal of Molecular Structure},
  • J. Dostal, S. Man, +7 authors R. Marek
  • Published 2004
  • Chemistry
  • Journal of Molecular Structure
  • Abstract The free bases of protoberberine alkaloids berberine and coptisine and related compounds have been examined. The 1H and 13C NMR data of 8-hydroxy-7,8-dihydroberberine (2a), 8-hydroxy-7,8-dihydrocoptisine (2b), bis(7,8-dihydroberberin-8-yl) ether (3a), 8-oxoberberine (5a), and 8-oxocoptisine (5b) as well as X-ray data of compounds 2a, 5a, and 5b are reported and discussed. 
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