Abstract
One-pot synthesis of azo and sulfonated pyrimido[4,5-b]quinoline derivatives was developed by three-component reaction of azo and sulfonated aldehydes, 6-amino-1,3-dimethyluracil, and dimedone or 1,3-cyclohexadione in the presence of choline chloride/oxalic acid (ChCl/Oxa) at 80 °C. The products formed in excellent yields over appropriate reaction times under an environmentally friendly condition. One-pot reaction, high efficiency, and easy purification of products by simple recrystallization are some of the considerable advantages of this procedure.
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