Phenylphosphonic acid is an efficient, friendly and reusable heterogeneous catalyst for the synthesis of α-aminophosphonates through a ‘one-pot’ three-component reaction of amines, carbonyl compounds and dialkyl phosphites undersolvent-freeconditions. This methodology illustrates a very simple procedure, with wide applicability, extending the scope to aliphatic and aromatic amines, aliphatic and
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.
Organocatalytic synthesis of α-hydroxy and α-aminophosphonates
作者:Seyed Mohammad Vahdat、Robabeh Baharfar、Mahmood Tajbakhsh、Akbar Heydari、Seyed Meysam Baghbanian、Samad Khaksar
DOI:10.1016/j.tetlet.2008.08.094
日期:2008.11
A new and highly flexible procedure is described for the synthesis of α-amino- and α-hydroxy phosphonates. In the presence of a catalytic amount of oxalic acid (10 mol %), trimethyl phosphite reacts with aldehydes or imines (generated in situ from an aldehyde and an amine) to yield the corresponding coupled products in good yield.
Phenylboronic Acid as Efficient and Eco-Friendly Catalyst for the One-Pot, Three-Component Synthesis of α-Aminophosphonates under Solvent-Free Conditions
A simple, mild, and efficient one-pot, three-component synthetic method has been developed for the preparation of α-aminophosphonates using phenylboronic acid as catalyst undersolvent-freeconditions at 50 °C. The process involves the reaction of carbonylcompounds (aldehydes or ketones) with benzylamine and dimethyl phosphite. A wide range of carbonylcompounds are compatible with this reaction,
开发了一种简单、温和、高效的一锅三组分合成方法,以苯基硼酸为催化剂,在 50 °C 无溶剂条件下制备 α-氨基膦酸酯。该过程涉及羰基化合物(醛或酮)与苄胺和亚磷酸二甲酯的反应。广泛的羰基化合物与该反应相容,可在短时间内以中等至极好的收率生产叔和季 α-氨基膦酸酯。
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