Three-component reactions of aldehydes, amines, and diethyl phosphite catalyzed by FeCl3 in EtOH or under solvent-free and mild conditions afforded the corresponding α-amino phosphonates in excellent yields.
A carbon tetrabromide （CBr4） catalyzed one-pot synthesis of 4-substituted-1,4,5,6,7,8-hexahydroquinolin-5-one derivatives via a Hantzsch reaction under mild conditions was described.
