Abstract
Organic synthesis in water is a new methodology of green chemistry. AlCl 3-catalyzed diazocoupling of 1-(aryl/hetaryl)-3-phenyl-1 H-pyrazol-2-in-5-ones ( 1) in water with different aryl/hetaryldiazonium salts afforded the corresponding hetaryl-azopyrazolones ( 2) as colored products with high yields. These dyes were characterized by UV–vis, FT-IR and 1H NMR spectroscopic techniques and elemental analysis. Cotton, wool, silk and polyesters fabrics were dyed and their photostability and color fastness were identified.
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