BENZIMIDAZO-(1,2-A)-QUINOLINES AND PROCESS FOR THEIR PREPARATION

摘要

BENZIMIDAZO-1,2-a!-QUINOLINES AND PROCESS FOR THEIR PREPARA TION of the disclosure: Benzimidazo-1,2-a!-quinolines of the formula I In the solid and dissolved state, the compounds of the invention are strongly fluorescing from reddish-blue to red, depending on the substitution. The compounds can be used as optical brighteners and as fluorescent dyestuffs . Furthermore they are valuable intermediates for the preparation of optical brighteners and fluorescing dyestuffs. They are distinguished by a very good fastness to light.