105074-45-1Relevant articles and documents
Synthesis and Properties of Some 7-Dimethylamino-1,4-benzoxazin-2-ones
Bris, Marie-Therese
, p. 1275 - 1280 (2007/10/02)
The synthesis of the 7-dimethylamino-1,4-benzoxazin-2-ones (5), fluorescent dyes, by condensing α-ketoacids 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).