M. L. Bris
Sep 1, 1985
Citations
1
Influential Citations
24
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
The synthesis of the 7-dimethylamino-1,4-benzoxazin-2-ones (5), fluorescent dyes, by condensing α-keto-acids with 2-amino-5-dimethylaminophenol is described. When the 3-substituent is a methyl group, these compounds can be further condensed with aromatic aldehydes to provide the styryl dyes (6). These products are easily opened by hydrochloric acid in ethanolic solution to afford the corresponding benzalketoacid ethyl esters (7).