Pyridazine derivatives and related compounds. 23*. Synthesis of 3-substituted pyrazolo[3,4-c]pyridazines and their application as disperse dyes

Abstract

The dyes were applied to polyester and polyamide fabrics, and their spectral and fastness properties were measured.

Synthesis of Some Thiazino-pyrazoles as Potential Fungicides

“…The IR spectra were recorded in KBr disc on Perkin-Elmer-720 spectrophotometer. The 1 H NMR spectra were recorded in CDCl 3 /DMSO-d 6 on Varian A-60D spectrophotometer. The chemical shifts are recorded in d ppm down field from TMS, which are used as an internal standard.…”

“…They are used as colouration of paints, varnishes, lacquers in the field of industry 3,4 . These derivatives are used as anti-oxidant 5 for rubber , linseed oil and as disperse dyes 6 . They possess wide range of pharmacological activities as hypoglycemic 7 , antimicrobial 8,9 , anticonvulsive 10 , antiinflammatory 11 , antihistaminic 12 , anti coagulant 13 , and anti-rheumatic 14 agents etc.…”

Pyridazine and its related compounds: Part 33. Synthesis of some disperse dyes derived from 3-hydrazinyl-4,5-diphenyl-1H-pyrazolo[3,4-c]pyridazine and their color assessment on polyester fabric

“…The synthesis of 3-hydrazinyl-4,5-diphenyl-1H-pyrazolo [3,4-c]pyridazine (2) [8], and azobenzene compounds (5a-i) [9], were conducted according to known procedures (Scheme 1). Spectral data for compounds 5a-i were described in the previous parts [9][10].…”

“…Also, they are used as key starting material for the synthesis of commercial aryl/ hetarylazopyrazole dyes [4]. All these properties aroused our interest in synthesis new heterocyclic compounds including the pyrazolo [3,4-c]pyridazine moiety which is a continuation of our previous work [5][6][7][8][9].…”

Pyridazine derivatives and its related compounds. Part 31. Synthesis of some disperse dyes derived from 3-amino-1H-pyrzolo[3,4-c]pyridazine and their color assessment on polyester fabrics

“…For instance, aminosubtituted pyrazole, thiazole, thiophene compounds afforded very electronegative diazo components and, consequently, provide a pronounced benzenenoid compounds [2]. We have previously reported the synthesis of novel heterocyclic systems such as 3-substituted azo-3H-pyrazolo [3,4-c]pyridazines [3], 4-[(4-arylazo-3,5-dimethylpyrazol-1-yl)carbonyl]-3,6-diphenyl pyridazine-3(2H)-one (Part 30) [4], 3-(4-arylazo-3,5-disubstituted pyrazol-1-yl)-4,5,6-triphenylpyridazines [5] and 5amino-6-[[4-arylazo-3,5-dimethylpyrazol-1-yl]-carbonyl]-3,4diphenylthieno [2,3-c]pyridazines [6] and their application to polyester fibers as disperse dyes, which gave encouraging results.…”