Abstract
The reaction process of DHA, when it reacted with an excess of methyl-, ethyl-benzyl- or phenethylamine under a mild condition, was clarified as follows : The primary reaction product is Schiff's base, the secondly product 2, 6-bis (alkylamino)-2, 5-heptadien-4-one, and the final product lutidone derivative. In the case of the reaction of DHA with an excess of ammonia, two compounds, lutidone and lutidonecarboxylic acid, were obtained as final products. But lutidonecarboxylic acid seems not to be the intermediate to lutidone under these mild conditions.
