P2O5 supported on SiO2 as an efficient and reusable catalyst for rapid one-pot synthesis of carbamatoalkyl naphthols under solvent-free conditions

Abstract Under mild conditions and without any additional organic solvent, synthesis of carbamatoalkyl naphthols by the one-pot three-component reaction of β-naphthol with a wide range of aromatic aldehydes and methyl carbamate could be carried out in the presence of P2O5 supported on SiO2 (P2O5/SiO2). The results showed that the catalyst has high activity and the desired products were obtained in high yields in short reaction times. Other beneficial features of this protocol include inexpensive and easily obtained catalyst, simple work-up, and the recyclability and reusability of the catalyst for up to five consecutive runs.