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2-Pentyl-3-methyl-2-cyclopenten-1-one Basic information
2-Pentyl-3-methyl-2-cyclopenten-1-one Chemical Properties
Safety Information
  • WGK Germany 2
  • RTECS GY7302000
  • TSCA Yes
  • HS Code 29142990
  • ToxicityThe acute oral LD50 in rats was reported as 2.5 g/kg (1.79-3.50 g/kg) (Keating, 1972). The acute dermal LD50 value in rabbits was reported as 5 g/kg (Keating, 1972).
2-Pentyl-3-methyl-2-cyclopenten-1-one Usage And Synthesis
  • Chemical Properties2-Pentyl-3-methyl-2-cyclopenten-1-one is a colorless, slightly viscous liquid with a typical jasmine odor, resembling that of the naturally occurring (Z)-jasmone. Dihydrojasmone is produced by an acid-catalyzed rearrangement of 4-methyl-??-decalactone, which is readily obtained by radical addition of 2-octanol to acrylic acid.
    Dihydrojasmone is used in perfumery in jasmine bases and, more generally, in floral and fruity fragrances.
  • Chemical Properties3-Methyl-2-(n-pentanyl)-2-cyclopenten-1-one has a fresh, fruity, jasmine odor with woody and herbal nuances.
  • OccurrenceHas apparently not been reported to occur in nature.
  • PreparationHexyl bromide plus levulinic ester yields a lactone, which is reacted with polyphosphoric acid or phosphorus pentoxide to produce hydrojasmone.
  • Taste threshold valuesTaste characteristics at 10 ppm: sweet, floral, green, herbal with a citrus nuance.
  • Synthesis Reference(s)Canadian Journal of Chemistry, 56, p. 2301, 1978 DOI: 10.1139/v78-379
    Journal of the American Chemical Society, 92, p. 7428, 1970 DOI: 10.1021/ja00728a029
2-Pentyl-3-methyl-2-cyclopenten-1-one Preparation Products And Raw materials
2-Pentyl-3-methyl-2-cyclopenten-1-one(1128-08-1)Related Product Information
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