SYNTHESIS OF THIAPENTA- AND THIAHEXACARBOCYANINE DYES FROM ALKOXY-SUBSTITUTED POLYMETHINE SALTS WITH DIMETHYLAMINE RESIDUES

The possibility of the use of alkoxypolymethine salts with dimethylamine residues to obtain thiapenta- and thiahexacarbocyanine dyes is demonstrated. The synthesis of a number of meso-alkoxythiapentacarbocyanines that contain various condensed rings in the 12 and 14 positions of the polymethine chain was realized, and their photographic properties were investigated. It was established that the dyes obtained are effective infrachromatic sensitizers. The electronic absorption spectra of the synthesized compounds were measured.