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The synthesis of some new α-aminophosphonates (4a-l) was accomplished by one pot reaction of equimolar quantities of 2-amino-4-chlorophenol (1), various aromatic aldehydes (2a-l) and diethylphosphite (3) in dry toluene at reflux temperature. Products 4a-l were characterized by IR, 1 H, 13 C, 31 P NMR and in the case of 4g by X-ray crystal diffraction data.

Synthesis, NMR, X-ray crystallography and bioactivity of some α-aminophosphonates