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
Green chemistry letters and reviews