Two merocarbocyanine dyes confaining benzoylallylidene groups-which were soluble in mixed medium ether and alcohol, -and two β-phenylpentamethine cyanine dyes which were insoluble in the above medium-were obtained from Na salt of formylacetophenone and ethiodide of quinaldine and 2-methylbenzothiazole.
Merocarbocyanine dyes were produced when orthoformate, ketomethylene compounds and the mother components of the dyes were heated together.; mother components-alkyl halide of α-picoline, 2, 6-lutidine, quinaldine and 2-methylbenzothiazole. ketomethylene compounds 1, 2-diphenyl-3, 5-dioxopyrazolidine, 1, 2-ditolyl-3, 5-dioxopyrazolidine and thiobarbituric acid.
Aminovinyl compounds were produced when orthoformate, primary aromatic amines and the mother components of the dyes-above mentioned-were heated together. But sulfamine, p-bromoaniline and p-aminosalicylic acid did not gave the aminovinyls when they were reacted with methiodide of α-picoline and 2, 6-lutidlne. And p-nitroanitine. o-nitro-p-toluidine and p-nitro-o-phenetidine gave carbocyanine dyes when they were reacted with alkyl halide of quinaldine of 2-methylbenzothiazole.
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