Magnetic Fe3O4@SiO2 Core–Shell Nanoparticles Functionalized with Sulfamic Acid Polyamidoamine (PAMAM) Dendrimer for the Multicomponent Synthesis of Polyhydroquinolines and Dihydro-1HIndeno[1,2-b] Pyridines

Abstract

In recent years, the development of environmentally benign catalysts and conditions has been one of the most important goals in the synthesis of widely used organic compounds.1–3 Magnetic nanoparticles (MNPs) are promising materials for researchers due to their strong magnetic properties, small size, high surface area, low-cost synthesis and biocompatibility.4–5 MNPs have been used in a broad array of applications such as catalysis,6 drug delivery,7 magnetic resonance imaging,8 sensors,9 nonlinear optics,10 and gene therapy.11 Furthermore, Fe3O4 nanoparticles enable encapsulation or immobilization of molecules such as dendrimers, proteins, and enzym