Green sonosynthesis of phenazinpyrimidines using Co₃O₄/ZnO@N‐GQDs@SO₃H nanocomposite as a robust heterogeneous catalyst

Abstract

SO 3 H functionalized Co 3 O 4 /ZnO@N-GQDs nanocomposite as a green heterogeneous solid acid catalyst has been utilized for the synthesis of phenazinpyrimidines by the four-component reaction of 2-hydroxy-1,-4-naphthaquinone, o-phenylenediamine, aldehydes, and 6-amino-1,-3-dimethyluracil under ultrasonic irradiations. The catalyst has been characterized by Fourier-transform infrared spectroscopy, scanning electron microscope, X-ray powder diffraction, energy-dispersive X-ray spectroscopy, thermogravimetric analysis, Brunauer-Emmett-Teller, and vibrating-sample magnetometer). This method provides several benefits, including excellent yields in short reaction times, wide range of products, and applying the sonochemical methodology as efficient method.

Green sonosynthesis of pyridopyrimidines using heterogeneous Pd‐containing catalysts anchored on a hybrid organic–inorganic surface of SBA‐15

“…[11] The use of ultrasound has improved numerous synthetic reactions. [12] The advantages of ultrasound irradiation are short reaction times, high yields, low side products, and saving money and energy. [13] Diversity-oriented synthesis (DOS) has been applied to synthesize and design new molecular skeletons.…”

“…[ 11 ] The use of ultrasound has improved numerous synthetic reactions. [ 12 ] The advantages of ultrasound irradiation are short reaction times, high yields, low side products, and saving money and energy. [ 13 ]…”

A review on lawsone-based benzo[a]phenazin-5-ol: synthetic approaches and reactions

“…Finally, the product 271 was formed by Michael addition/dehydration reactions between 6-amino-1,3-dimethyluracil and intermediate 272. 111 …”