Description
Methyl 2-undecynoate has a powerful, waxy, green, floral odor
with a sweet flavor reminiscent of violet. May be prepared by
methylation of the corresponding acid at the boil in the presence
of HCL or at room temperature in the presence of H2S04; the acid
can be prepared from methyl nonyl ketone by reaction with phosphorous
pentachloride, which yields the acetylenic compound;
treatment of this with potassium carbonate yields undecyne, which
is then converted to the acid by treatment with Na and methyl
chlorocarbonate.
Chemical Properties
Methyl 2-undecynoate has a powerful, waxy, green, floral odor. It has a sweet flavor reminiscent of violet
Preparation
By methylation of the corresponding acid at the boil in the presence of HCl or at room temperature in the presence of
H2SO4; the acid can be prepared from methyl nonyl ketone by reaction with phosphorus pentachloride, which yields the acetylenic
compound; treatment of this with potassium carbonate yields undecyne, which is then converted to the acid by treatment with sodium
and methyl chlorocarboante.
Definition
ChEBI: Methyl 2-undecynoate is a fatty acid ester.
Taste threshold values
Taste characteristics at 20 ppm: green, fruity, oily, fatty, chicken- and tallow-like.
