Catalytic synthesis of thiazolidines by the reaction of Nef-isocyanide reaction

A practical and efficient method for the synthesis of thiazolidine derivatives via Nef-isocyanide three-component reaction using supported phosphoric acid on graphene oxide (GO-H2PO4) is described. In this study, a relatively simple method starting with cyclic and acyclic thiourea was employed. The catalyst was characterized using FTIR, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction techniques. Using a combination of acetonitrile as solvent and GO-H2PO4 as a catalytic system, the best results were obtained. All products were characterized using melting point, FTIR, MASS, H-1 NMR, and C-13 NMR techniques. The use of commercially available chemicals, reusability of the catalyst, high yields, decreased environmental hazards, with no need for the separation of stereoisomers, and, consequently, a reduced number of overall steps are the advantages of this approach that make it an appropriate choice at an increased scale.