After several experimentations, the following route to X was developed. 1- Carboxyanthraquinone (IIT) 2) which was derived from 1, 9-benz-10-anthrone (II) by chromic acid oxidation was converted to 1-carboxyanthracene (IV) 3) by reduction with zinc dust in aqueous ammonia. The acid chloride V4) which was obtained on treatment of IV with thionyl chloride was caused to react with diethyl ethoxymagnesiomalonate in toluene. The ...
