Microwave-assisted synthesis of 1-aminoalkyl phosphonates under solvent-free conditions

A simple, efficient and general method has been developed for the synthesis of 1-aminoalkyl phosphonates through a one-pot reaction of aldehydes with amines in the presence of acidic alumina under solvent-free conditions using microwave irradiation. It was also found that acidic alumina supported ammonium formate under solvent-free conditions is capable of the synthesis of 1-aminophosphonates from aldehydes and diethyl phosphite under mild reaction conditions.