Yu. L. Slominskii

Quino-4-cyanines with carbonyl-containing substituents

Abstract6-Carbonyl-substituted lepidines and their quaternary salts were synthesized. Quino-4-cyanines were obtained from them. The introduction of carbonyl-containing substituents substantially deepens the color of the dyes obtained.

SYNTHESIS OF BENZIMIDAZOLE DERIVATIVES. IX. IMIDATRICARBOCYANINES

Benzimidazoliumsalze (I) reagieren mit dem Methylphenyl-(5-methylphenylamino-pentadien- 2,4-yliden)-ammoniumchlorid (II) zu den Heptamethincyaninen ( = Tricarbocyanine) (III).

Tricarbocyanines with dihydropyran, dihydrothiapyran, and N-methyltetrahydropyridine rings in the chromophore

Glutaconic dialdehyde dianil salts, the α,α′-carbon atoms of which are included in dihydropyran, dihydrothiapyran, or N-methyltetrahydropyridine rings, were synthesized. Tricarbocyanine dyes with epoxydimethylene, epithiodimethylene, or N-methylepiminodimethylene groupings were synthesized by condensation of the dianil salts with a 2-methylbenzothiazole quaternary salt. The color of the dyes is discussed.