(6S)-(+)-8,9-dehydrotheaspirone - Fruity-floral aroma (Kataoka, et. al.); floral, woody-ambery, powdery, reminiscent of Cetonal with natural fruity, orris-like facets (Serra, et. al.). Odor threshold = 100 ppb (Kataoka, et. al.) Odor threshold (5 panellists) = 9.8 ng/L air (Serra, et. al.). = (+)-(5S)-2,6,10,10-tetramethyl-1-oxaspiro[4.5]deca-2,6-dien-8-one Ref: Hitomi Kataoka, Hideki Nakamoto, Taro Kitauro, Masakazu Ishihara, Perfume Quality Improver, Perfume Composition, Cosmetic or Food, Japanese Patent Publication No. 2002069480 (March 8, 2002); Stefano Serra, Assem Barakat and Claudio Fuganti, Chemoenzymatic resolution of cis- and trans-3,6-dihydroxy-a-ionone. Synthesis of the enantiomeric forms of dehydrovomifoliol and 8,9-dehydrotheaspirone, Tetrahedron: Asymmetry 18 (2007) 2573–2580.

(6R)-(-)-8,9-dehydrotheaspirone - Woody aroma (Kataoka, et. al.); woody, dry, cedarwood odor with a green, earthy, tobacco and olibanum inflection and floral-fruity nuances (Serra, et. al.). Odor threshold = 500 ppb (Kataoka, et. al.) Odor threshold (5 panellists) = 13.7 ng/L air (Serra, et. al.). = (-)-(5R)-2,6,10,10-tetramethyl-1-oxaspiro[4.5]deca-2,6-dien-8-one Ref: Hitomi Kataoka, Hideki Nakamoto, Taro Kitauro, Masakazu Ishihara, Perfume Quality Improver, Perfume Composition, Cosmetic or Food, Japanese Patent Publication No. 2002069479 (March 8, 2002); Stefano Serra, Assem Barakat and Claudio Fuganti, Chemoenzymatic resolution of cis- and trans-3,6-dihydroxy-a-ionone. Synthesis of the enantiomeric forms of dehydrovomifoliol and 8,9-dehydrotheaspirone, Tetrahedron: Asymmetry 18 (2007) 2573–2580.

Ionones, Irones, Damascones & Structurally Related Odorants

Acyclics (Alcohols, Esters, Acids, Aldehydes)

Lactones

Sesquiterpenoid Related Odorants