clear colorless to yellow liquid
Pulegone.has.a.pleasant.odor,somewhat.similar.to.peppermint.and.camphor.
The l-form is found in the essential oils of Agastache formosana, Israeli orange, Barosma betulina and Barosma crenulata; the d-form is the most abundant and is found in pennyroyal oils. Also reported found in rabbiteye blueberry, black currants (buds), fresh blackberry, heated blackberry, peppermint oil, corn mint oil, spearmint oil, Scotch spearmint oil, other Mentha oils, thyme, black tea, origanum, Ocimum basilicum varieties, rosemary, lemon balm, buchu oil, anise hyssop, sweet grass oil and German chamomile oil.
A monoterpene, commonly found in the essential oils of Nepeta cataria (Catnip).
ChEBI: The (5R)-enantiomer of p-menth-4(8)-en-3-one.
Detection:.130.ppb..Aroma.characteristics.at.1.0%:.minty.cooling,.herbal.green,.sweet,.clean.spicy,.with. wintergreen.nuances.
Taste characteristics at 20 ppm: minty, terpy, cooling, woody pine, citrus lime, with fresh green peppermint notes.
(R)-(+)-Pulegone, a monoterpene ketone found in the essential oil of pennyroyal, can induce abortion.
Isolated.from.pennyroyal.oil.(Moroccan.or.Spanish);.synthesis.from.3-methyl.cyclohexanone..The.structure.has.been.defined. by.the.work.of.several.authors;.the.d-,.l-.and.dl-forms.are.known;.the.dl-form.is.prepared.synthetically.and.is.not.found.in.nature.
Purify pulegone via the semicarbazone which has m 174o (from MeOH) and [] D +68.2o (c 1, CHCl3). Fractionally distil it in vacuo. [Short & Read J Chem Soc 1309 1939]. [Erskine & Waight J Chem Soc 3425 1960, cf Ort Org Synth 65 203 1987, Beilstein 7 III 334, 7 IV 188.]
