8-Benzimido substituted quinaphthalone derivatives

Abstract

A compound of the following formula ##STR1## wherein R represents an alkyl group containing 1 to 4 carbon atoms or a phenyl group; X.sub.1 represents a chlorine or bromine atom; Y represents the group of the formula ##STR2## WHEREIN X.sub.2 and X.sub.3 each represent a chlorine or bromine atom, and n is an integer of 2 to 4; and ring A may be substituted by an alkyl group containing 1 to 4 carbon atoms and or a halogen atom. The compound of formula (I) can be easily produced by reacting a quinoline derivative of the formula ##STR3## wherein R, X.sub.1 and the ring A are the same as defined above, with an aryldicarboxylic acid or its reactive derivatives. The compounds of formula (I) are useful as yellow organic pigments.

Dependencies are inferred from the claim text.