DYES DERIVED FROM ACETONE DICARBOXYLIC ACID

Acetone dicarboxylic acid has been condensed with resorcinol at 200°. A red crystalline dye (dye I) is obtained which gives a red colour with greenish fluorescence when dissolved in alkali.

A study of the constitution of dye I his been made. A new dye (dye II) has been obtained from 7-hydroxycoumarin-4-acetic acid and resorcinol, and its constitution assigned. The octa- and hexabromo compounds of dyes I and II respectively have also been prepared and studied.