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-(-)-4-propylbutan-4-olide.gif)
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(S)-(-)-4-propylbutan-4-olide
- fatty, coconut note, with fruity-sweet
aspects, less intens than the
(R)-enantiomer
Threshold =
890 ppb in water (Yamamoto)
Also known as
(S)-(-)-gamma-heptalactone
Ref: Armin
Mosandl & Claus Gunther, Stereoisomeric
Flavor Compounds. 20. Structure and Properties
of gamma-lactone Enantiomers, J. Agric. Food
Chem., 1989, 37, 413-418; Mans H. Boelens,
Harrie Boelens & Leo J. van Gemert, Perfumer
& Flavorist, Vol. 18, No. 6, 1-15, 1993;
Takeshi Yamamoto, Advances in the Transition
Metal (Rh, RU)-Binap-Catalyzed Asymmetric
Synthesis of Chral Compounds for Flavours and
Fragrances and Their Associated Sensory
Properties, in Current Topics in Flavours and
Fragrances - Towards a New Millennium of
Discovery, by K.A. Swift (Editor), Kluwer
Academic Publishers, Dordrecht NL, 2000, pp.
33-58
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-(+)-4-propylbutan-4-olide.gif)
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(R)-(+)-4-propylbutan-4-olide
- sweet, spicy, herbaceous hay note, reminiscent
of coumarin
Threshold =
700 ppb in water (Yamamoto)
Also known as
(R)-(+)-gamma-heptalactone
Ref: Armin
Mosandl & Claus Gunther, Stereoisomeric
Flavor Compounds. 20. Structure and Properties
of gamma-lactone Enantiomers, J. Agric. Food
Chem., 1989, 37, 413-418; Mans H. Boelens,
Harrie Boelens & Leo J. van Gemert, Perfumer
& Flavorist, Vol. 18, No. 6, 1-15, 1993;
Takeshi Yamamoto, Advances in the Transition
Metal (Rh, RU)-Binap-Catalyzed Asymmetric
Synthesis of Chral Compounds for Flavours and
Fragrances and Their Associated Sensory
Properties, in Current Topics in Flavours and
Fragrances - Towards a New Millennium of
Discovery, by K.A. Swift (Editor), Kluwer
Academic Publishers, Dordrecht NL, 2000, pp.
33-58
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