Multi-component reaction synthesis of novel 3-phenyl-3,4-dihydro-2<i>H</i>-benzo[<i>a</i>][1,3] oxazino[5,6-<i>c</i>]phenazine derivatives catalyzed by reusable ZnO-PTA@Fe<sub>3</sub>O<sub>4</sub>/EN-MIL-101(Cr) nanopowder at room temperature
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A simple, one-pot procedure for the synthesis of novel 3-phenyl-3,4-dihydro-2H-benzo[a][1,3] oxazino[5,6-c]phenazine derivatives by four-component coupling reaction between benzo[a]phenazine-5-ol, formaldehyde and amine in the presence of a catalytic amount ZnO-PTA@Fe3O4/EN-MIL-101(Cr) nanopowder in ethanol at room temperature under stirring condition. ZnO-PTA@Fe3O4/EN-MIL-101(Cr) An inorganic magnetic catalyst was analyzes and described by the XRD, TEM, FESEM, TGA, AFM, VSM and ICP-OES. This study presents simple, efficient, and one-pot multicomponent protocol, which provides several advantages such as short reaction times, high yields, easy working up, chromatography-free technique, catalyst recovery, and reusability are other highlights of this work.
