Catalytic Applications of Nano‐Fe‐[Phenyl‐Salicylaldimine‐Methylpyranopyrazole]Cl₂ as a Schiff Base Complex and Nanostructured Catalyst for the Synthesis of Hexahydroquinolines

Abstract

By the four‐component condensation reaction of benzaldehyde with ethyl acetoacetate, malononitrile, and hydrazine hydrate using FeCl 2 , a pyranopyrazole derivative was synthesized and then reacted with salicylaldehyde to give nano‐Fe‐[phenyl‐salicylaldimine‐methylpyranopyrazole]Cl 2 (nano‐[Fe‐PSMP]Cl 2 ). The prepared nano‐Schiff base complex was successfully used as an efficient catalyst for the synthesis of hexahydroquinolines.