SYNTHESIS OF SOME NEW-TYPE OF NAPHTHOTHIAZOLE TRIAZOLES FROM LAWSONE

A series of 3-aryl ,3':4,5]thiazolo[3,2-b]-1,2,4-triazolo-5,10-diones (V) have been prepared by the condensation of bromo lawsone (I) with 5 -mercapto-3-substituted 1,2,4-triazole (II) followed by cyclization of the resulting uncyclized products (IV) with alcohol and sulfuric acid . The products are identical with the condensation products of 2,3-dic hloro naphthoquinune (III) with 5-mercapto-3-substituted 1,2,4-triazol es in the presence of anhydrous alcohol containing fused sodium acetat e.