one-pot synthesis of benzopyranophenazines using graphene oxide dichlorotriazine (go-dct) under microwave irradiations

An efficient synthesis of benzopyranophenazines is presented by one-pot fourcomponent reaction of hydroxynaphthoquinone, o-phenylenediamine, benzaldehydes, and malononitrile with graphene oxide dichlorotriazine (go-dct) as an efficient nanocatalyst under microwave irradiation in ethanol. the catalyst was characterized by fouriertransform infrared spectroscopy (ft-ir), x-ray powder diffraction (xrd), energy dispersive spectroscopy (eds), atomic force microscopy (afm), and scanning electron microscopy (sem). atom economy, experimental simplicity, wide range of products, low amount of catalyst loading, reusability of the catalyst, excellent yields in short reaction times, and applying the microwave methodology as an efficient and green method are some of the substantial features of this method.