The addition of diethyl phosphite to cyclic imines bearing alkyl,
aryl, or heteroaryl substituents at the α-position in diethyl ether
at room temperature presents an efficient route to substituted cyclic α-aminophosphonates.
The application of boron trifluoride-diethyl ether complex
as a catalyst significantly accelerates the reaction.
diethyl phosphonate - cyclic imines - addition
reactions - α-aminophosphonates