Isolation of (R)-(+)-Pulegone from the European Pennyroyal Mint, Mentha Pulegium

  title={Isolation of (R)-(+)-Pulegone from the European Pennyroyal Mint, Mentha Pulegium},
  author={Larry G. French},
  journal={The Chemical Educator},
  • L. G. French
  • Published 1 October 2002
  • Chemistry
  • The Chemical Educator
Students obtain, via steam distillation, pennyroyal essential oil that is analyzed by capillary gas chromatography—mass spectrometry. TLC experiments establish conditions for preparative scale purification of the major oil component via flash column chromatography. The terpene obtained, (R)-(+)-pulegone, is characterized spectroscopically, employing at a minimum mass spectral molecular ion and fragmentation patterns, IR, and 300-MHz 1H NMR. Optionally, 13C and 2-D correlation NMR spectra can be… 
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