Description
May be synthesized by hydration of 4-hexen-2-yne aqueous
H2S04/HgS04; by hydrogenation of 2-hexen-5-yn-4-one over PdCaC03 catalyst in methanol.
Chemical Properties
Clear colorless to yellow liquid
Chemical Properties
4-Hexene-3-one has a pungent, acrid, metallic, ethereal odor
Occurrence
Reported found in cooked chicken, beef and pork
Definition
ChEBI: 4-hexen-3-one is an enone that is hex-2-ene in which the two methylene hydrogens at position 4 have been replaced by an oxo group. It has a role as a flavouring agent, a plant metabolite and a human metabolite.
Preparation
By hydration of 4-hexen-2-yne aqueous H2SO4-HgSO4; by hydrogenation of 2-hexen-5-yn-4-one over Pd-CaCO3 catalyst
in methanol.
Aroma threshold values
Aroma characteristics at 1.0%: pungent, horseradish and mustard with an ethyl vinyl ketone ethereal note,
notes reminiscent of vinegar and rum.
Taste threshold values
Taste characteristics at 10 ppm: pungent mustard, pepper, horseradish, rum, roasted onion and slightly tropical nuances
General Description
4-Hexen-3-one is an unsaturated aldehyde that is reported to occur in strawberry fruit, essential oil of
Ruta graveolens and
Holigarna grahamii leaves. Due to its fruity fragrance, it is also used in the perfume industry.
