Chirality & Odour Perception
John C. Leffingwell, Ph.D.

The 2-Heptylcyclopentanones

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Photo by permission of M. Roudintska - Art & Parfum

(2S)-(+)-2-heptylcyclopentanone - Heavy, coconut-like oily fruity and jasmine-like floral odor with somewhat herbaceous side note

Odor Threshold = 10 ppb

Ref: Takeshi Yamamoto, Miharu Ogura, Akira Amano, Kenichiro Adachi, Toshimitsu Hagiwara and Tsuneyoshi Kanisawa, Synthesis and odor of optically active 2-n-hexyl- and 2-n-heptylcyclopentanone and the corresponding delta-lactones, Tetrahedron Letters 43, (2002) 9081–9084.

(2R)-(-)-2-heptylcyclopentanone - Powerful diffusive warm jasmine-like floral odor with somewhat mandarin-like citrus side note and more tenacious than the (S)-isomer

Odor Threshold = 10 ppb

Ref: Takeshi Yamamoto, Miharu Ogura, Akira Amano, Kenichiro Adachi, Toshimitsu Hagiwara and Tsuneyoshi Kanisawa, Synthesis and odor of optically active 2-n-hexyl- and 2-n-heptylcyclopentanone and the corresponding delta-lactones, Tetrahedron Letters 43, (2002) 9081–9084.

 

Cyclic Terpenoid Odorants

Bicyclic Terpenoid Odorants

Acyclic Terpenoid Odorants

Ionones, Irones, Damascones & Structurally Related Odorants

Acyclics (Alcohols, Esters, Acids, Aldehydes)

Lactones

Sesquiterpenoid Related Odorants

Steroid Urine Type Odorants

Sandalwood Type Odorants

Musk Odorants

Miscellaneous

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Copyright 2001 - Leffingwell & Associates