Chemical Properties
clear yellow liquid
Chemical Properties
1-Phenyl-1,2-propanedione has a pungent, plastic odor.
Occurrence
Reported found as a constituent in coffee, baked potato and butter.
Uses
Pyruvophenone was used in the synthesis of opioid receptor agonists for gastrointestinal disorders. The enantioselective hydrogenation of Pyruvophenone over Pt colloids was also studied.
Definition
ChEBI: An alpha-diketone that consists of 1-phenylpropane bearing keto substituents at positions 1 and 2. It is found in coffee.
Aroma threshold values
Aroma characteristics at 1.0%: creamy, buttery, fatty, slightly vanillalike, slightly walnut nutty, almond
and marzipanlike with a woody styraxlike nuance, and having a slightly sour yeasty and fermented nuance.
Taste threshold values
Taste characteristics at 5 ppm: cultured creamy, dairylike and slightly astringent with a slight spicy caraway/
cumin nuance.
Synthesis Reference(s)
The Journal of Organic Chemistry, 36, p. 3553, 1971
DOI: 10.1021/jo00822a019
General Description
1-Phenyl-1,2-propanedione is a volatile flavor compound found in khat leaves and cambará honey.
Synthesis
By oxidation of propiophenone or benzyl methyl ketone with selenium dioxide; by the acid hydrolysis of oximonopropiophenone
or other synthetic routes.
