19-08-2014, 10:57 AM
The novel fluorescent coumarin colorants were synthesized according to scheme I. The imino coumarin derivative, 3-(diethyl amino)-7-imino-7H [1]benzopyrano [3\',2\': 3, 4]pyrido[1,2a]benzimidazole-6-caronitrile was condensed with various aromatic and heteroaromatic carbonyl chlorides in pyridine to yield the novel fluorescent dyes.
The novel fluorescent coumarin colorants were synthesized according to scheme I. The imino coumarin derivative, 3-(diethyl amino)-7-imino-7H [1]benzopyrano [3\',2\' ,3, 4]pyrido[1,2a]benzimidazole-6-caronitrile was condensed with various aromatic and heteroaromatic carbonyl chlorides in pyridine to yield the novel fluorescent dyes.