Fused heterocycle 11-amino-13H-acenaphtho[1,2-e] pyridazino[3,2-b]quinazoline-13-one based monoazo disperse dyes

Novel azo disperse dyes derived from aminothiophenes: Synthesis and UV–visible studies

“…Inductive electron-withdrawal by the CH 2 CH 2 CN group leads to a reduction in the electron-releasing tendency of the terminal nitrogen atom and a consequent hypsochromic shift of the visible absorption band. This is in agreement with that previously reported by Patel et al [42]. Meanwhile, the substituents on the phenyl ring of the diazonium site exerted a negligable change in l max on comparing azo dyes 1d, 4d and 10d.…”

A review on synthesis of nitrogen-containing heterocyclic dyes for textile fibers - Part 2: Fused heterocycles

“…The exhaustion properties on different fibers were found to be reasonably good. Colorfastness to light ranged from fairly good to good for all disperse dyestuffs for both polyester and nylon 66 fibers except dyes 146a,c,f,g which were fair to fairly good [75] (Scheme 27) and ( Table 4).…”

Fe3O4@urea/HITh-SO3H as an efficient and reusable catalyst for the solvent-free synthesis of 7-aryl-8H-benzo[h]indeno[1,2-b]quinoline-8-one and indeno[2′,1′:5,6]pyrido[2,3-d]pyrimidine derivatives

“…Therefore, the synthesis of these heterocyclic compounds is significant for both organic and medicinal chemists. Several applications of quinoline-fused frameworks have already been highlighted in the literature as scaffolds of biological substances, such as ligands for preparing OLED phosphorescent complexes and intermediates in the dyestuffs industry [19][20][21][22][23][24][25]. The most common process for synthesizing indeno [1,2-b]quinoline diones have been reported via the condensation of 1-naphthylamine (1 mmol), aldehyde (1 mmol), and 2H-indene-1,3dione (1 mmol).…”