A Convenient Catalytic Method for the Synthesis of Pyridines with Henna and Pyrazole Moieties using Cooperative Vinylogous Anomeric‐Based Oxidation

Abstract

In this work, [Fe 3 O 4 @SiO 2 (CH 2 ) 3 ][DABCO-H][C(CN) 3 ] 2 was prepared, identified by various analyses such as FT-IR, EDX, SEM coupled EDX (SEM mapping), XRD, FE-SEM, TEM, TGA, DTG, ICP and VSM and used as a nanomagnetic catalyst for the synthesis of henna-based benzopyrazolo[3,4-b]quinolindiones via cooperative vinylogous anomeric based oxidation under solventfree condition. Some of these products are new and reported for the first time.