Description
6-Methyl-3,5-heptadien-2-one has a cinnamon-like odor with a
coconut undertone. May be prepared by reacting 2-methylbuten-
2-al with acetone in the presence of sodium ethylate or sodium
hydroxide; by pyrolysis of tertiary actylenic carbinyl acetoacetates
in the presence of an acid catalyst.
Chemical Properties
Clear colorless to light yellow liquid
Chemical Properties
6-Methyl-3,5-heptadine-2-one has a cinnamon-like odor with a coconut undertone
Occurrence
Reported as occurring in the oil of lavandin, grapes, tomato and tomato paste, green tea, filberts, cooked rice
and rice bran, licorice, corn oil and lemon balm
Uses
6-Methyl-3,5-heptadien-2-one is used in the preparation of (RS)-(E)-2,6-dimethyl-1,2-epoxy-3,5-heptadiene.
Preparation
By reacting 2-methylbuten-2-al with acetone in the presence of sodium ethylate or sodium hydroxide; by pyrolysis of
tertiary acetylenic carbinyl acetoacetates in the presence of an acid catalyst.
Aroma threshold values
Detection: 375 ppb
Taste threshold values
Taste characteristics at 30 ppm: green and sweet with a brown, herbal aftertaste.
