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

The Florhydrals®

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Photo by permission of M. Roudintska - Art & Parfum

(+)-(S)-Florhydral® - In comparison with the racemate, the (+)-enantiomer has a more green, less watery, and more powerful fragrance

Odour threshold = 0.035 ng/l air

Also known as (+)-(S)-3-(3-Isopropyl-phenyl)-butyraldehyde.

Ref: Agnese Abate, Elisabetta Brenna, , Claudia Dei Negri, Claudio Fuganti and Stefano Serra, Biocatalysed synthesis of the enantiomers of the floral odorant Florhydral®,Tetrahedron: Asymmetry, Volume 13, Issue 8, 15 May 2002, Pages 899-904

Florhydral® is a registered trademark of Givaudan SA

(-)-R)-Florhydral® - The (-)- enantiomer has a typical racemic Florhydral® smell - floral, fresh, green, muguet-like, but more marine, and more plastic

Odour threshold = 0.88 ng/l air

Also known as (-)-(R)-3-(3-Isopropyl-phenyl)-butyraldehyde.

Ref: Agnese Abate, Elisabetta Brenna, , Claudia Dei Negri, Claudio Fuganti and Stefano Serra, Biocatalysed synthesis of the enantiomers of the floral odorant Florhydral®,Tetrahedron: Asymmetry, Volume 13, Issue 8, 15 May 2002, Pages 899-904

Florhydral® is a registered trademark of Givaudan SA

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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