Additive Free Fe-Catalyzed Conversion of Nitro to Aldehyde under Continuous Flow Module

Fe-catalyzed direct transformation of nitro compounds to aldehyde under batch/continuous flow module is reported. This catalytic transformation is highly selective for syntheses of various aldehydes and does not require any additional additives such as bases and oxidants. Furthermore, the heterogeneous Fe–zeolite catalyst is recoverable and reusable for more than five cycles and offers gram-scale synthesis without the loss of catalytic efficiency. This heterogeneous catalyst has a maximum TOF of 5.93 h^–1.