Formamidine sulfonic acid Functionalized Fe۳O۴@SiO۲: Organocatalyzed Paal-Knorr pyrrolesynthesis

Today, due to the environmental toxicity of metal nanoparticles, the use of organic catalysts hasreceived much attention in many industries. In this paper, Formamidine sulfonic acid placed on the surface ofmagnetic nanoparticles has been used. This catalyst was evaluated in the synthesis of substituted pyrroles usingcondensation of amines and the desired product was achieved in high yields. Fe۳O۴@SiO۲@Formamidin sulfonicacid showed a typical superparamagnetic behavior so we could separate this catalyst from the reaction vesselby an external magnet. Formamidine sulfonic acid is a suitable catalytic agent because it is Cheap, has minimaltoxicity, and can create hydrogen bonds which is a good reason to use it. This catalyst was prepared and XRD,SEM, and VSM analyses were done to check its structure and dimensions

کلیدواژه ها:

Paal-Knorr ، Formamidine sulfonic acid ، superparamagnetic ، nano Catalyst