A New Protocol for a One-pot Synthesis of α-Amino Phosphonates by Reaction of Imines Prepared In Situ with Trialkylphosphites
作者:Mohammad R. Saidi、Najmedin Azizi
DOI:10.1055/s-2002-32957
日期:——
Imines prepared in situ by reaction of aldehydes and ketones with primary amines in ethereal solution of LiClO4 react readily at ambient temperature with trialkylphosphite to give high yields of α-amino phosphonates.
One-Pot Synthesis of Dialkyl Arylaminomethyl- and (Arylamino)arylmethylphosphonates and Their<i>N</i>-Acylated Derivatives
作者:L. K. Lukanov、A. P. Venkov
DOI:10.1055/s-1992-26083
日期:——
A convenient synthesis of dialkyl arylaminomethyl- and (arylamino) arylmethylphosphonates 3 and their N-acylated derivatives 5 have been developed, starting from azomethines and phosphorus trichloride in the presence of an alcohol.
Zinc oxide nanoparticles (ZnO NPs, ca. 22 nm) were used as an effective catalyst in the solvent-free, three-component couplings of aldehydes, aromatic amines and dialkyl phosphites at room temperature to produce various α-amino phosphonates. Compared to known methods, satisfactory results were obtained with high yields through a simple experimental procedure. The catalyst was recycled and reused five times with minor decrease in its catalytic activity.
efficient, and general method has been developed for the one-pot, three-component synthesis of α-aminophosphonates from condensation reaction of trimethyl phosphite, aryl aldehydes and aryl amines in the presence of CoCl 2 ·6H 2 O under solvent-free conditions. Thus α -aminophosphonates were synthesized relatively quickly in good yields at roomtemperature.