SYNTHESIS AND ABSORPTION ABILITIES OF PYRAZOLO[5,1-<i>c</i>][1,2,4]TRIAZINE-BASED DISPERSE DYES
DOI:
https://doi.org/10.1007/465Keywords:
ethyl cyanoacetate, pyrazole, diazo-coupling reaction, intramolecular cyclization, solvatochromismAbstract
A series of thirteen novel pyrazolo[5,1-c][1,2,4]triazine-based disperse dyes were synthesized by heating ethyl pyrazolylhydrazonocyanoacetate in glacial acetic acid. Solvent and acid-base influences on the wavelength of maximum absorption have been studied.
Also published in Chemistry of Heterocyclic Compounds, 2013, 49 (3), pp 457-465