Karas'ov O. Synthesis, reactivity and spectral properties of iminocoumarin derivatives

Systematic series of 3-carbamoyl-, 3-(2-benzimidazolyl)iminocoumarins, -coumarins and 2-amino-1-benzopyrylium salts were synthesized. New one-step high yield synthesis of 2-amino-3-(2-benzimidazolyl)-1-benzopyrylium salts with were proposed. New effective laser dyes for flash-lamp and eximer (XeCl*) pumping were found within synthesized compounds. Tautomerizm of 7-hydroxyiminocoumarins were found out and quantitatively charachterized. Acid-base equilibrium constants were obtained for studied compounds in water-alcohol medium for the ground and first excited singlet states. Using linear correlations between lgKa and (+-constants of substituents, (+-constant for ij-condenced 2,3,4,6,7,8-hexahydroquinolizine in para-position was obtained (-2.9).