Description
2.4-Nonadienal has a strong fatty, floral odor. It may be prepared by the method of Marshall and Whiting; by reduction with LiAlH4 of dienoic acid prepared by the Doebner synthesis, followed by oxidation of the resulting dienol with Mn02 to the corresponding 2.4-dienol.
Occurrence
Reported found in oxidized flavor of skim milk, in peas by enzymatic formation from lipids, salmon oil,
sunflower oil (cis-, trans-, and trans, trans-form), the autooxidation of lard, frozen peas, tomatoes and as a volatile component
in fish products. Also reported found in cranberry, asparagus, wheat bread, caviar, Russian cheeses, chicken, cooked beef,
mutton, lamb and pork, cognac, filberts, peanuts, popcorn, oatmeal, soybean, olive, beans, mushrooms, Brazil nut, rice and
buckwheat.
Synthesis
By reduction with LiAlH4 of dienoic acid prepared by the Doebner synthesis, followed by oxidation of the resulting dienol
with MnO2 to the corresponding 2,4-dienol
