Graphene Oxide as Recyclable Catalyst for One-Pot Synthesis of α-Aminophosphonates
作者:Kiran B. Dhopte、Dnyaneshwar S. Raut、Anand V. Patwardhan、Parag R. Nemade
DOI:10.1080/00397911.2014.989447
日期:2015.3.19
Abstract We report the synthesis of α-aminophosphonates from aromatic aldehydes, aromatic and aliphatic amines, and trimethylphosphite (Kabachnik–Fieldsreaction) using a “carbocatalyst,” graphene oxide, at room temperature with excellent yield and recyclability. Enhanced catalytic activity of graphene oxide as compared to other catalysts studied is possibly due to the presence of carboxylic acid and
Abstract A simple, efficient, and general method has been developed for the one-pot, three-componentsynthesis of α-amino phosphonates from a condensation reaction of trialkyl phosphite, aldehydes, and amines in the presence of a catalytic amount of succinic acid (8.5 mol %) (for the first time) under solvent-free conditions. The advantages of this protocol are excellent yields, short reaction time
Al(H<sub>2</sub>PO<sub>4</sub>)<sub>3</sub>as an Efficient and Reusable Catalyst for One-pot Three-component Synthesis of<i>α</i>-Amino Phosphonates under Solvent-free Conditions
Synthesis of α‐amino phosphonates is described under solvent‐free conditions at 100°C from reaction between aldehydes and amines in the presence of trialkyl phosphites using Al(H2PO4)3 as an efficient and reusable heterogeneous catalyst. The advantages of this procedure are short reaction time, flexibility and having high to excellent yields.
描述了在无溶剂条件下,在亚磷酸三烷基酯存在下,使用Al(H 2 PO 4)3作为有效且可重复使用的多相催化剂,醛与胺之间的反应,在无溶剂条件下合成α-氨基膦酸酯的方法。该方法的优点是反应时间短,柔韧性好并且产率高至优异。
Coupling of Aldehydes, Amines, and Trimethyl Phosphite Promoted by Amberlyst-15: Highly Efficient Synthesis of α-Aminophosphonates
A three-component reaction promoted by Amberlyst-15 of an amine, an aldehyde, and trimethylphosphite (Kabachnik-Fields reaction) in one pot under mild conditions affords the corresponding α-aminophosphonate in high yield after a short reaction time at ambient temperature.
Silver‐Catalyzed One‐Pot Three‐Component Synthesis of α‐Aminonitriles and Biologically Relevant α‐Amino‐phosphonates
作者:Vipin K. Pandey、Chandra Shekhar Tiwari、Arnab Rit
DOI:10.1002/asia.202200703
日期:2022.10.17
AbstractA simple silver salt (AgSbF6)‐catalyzed aminophosphonylation and Strecker reaction have been developed and successfully applied to a wide range of substrates (>55 substrates). This solvent‐, ligand‐, and base‐free one‐pot three‐component protocol operates effectively at room temperature to provide diversified α‐aminophosphonates and α‐aminonitriles, which gave access to the respective α‐amino amides. Importantly, the present catalyst system is also capable to produce the rarely reported and biologically relevant aminophosphonates (having anti‐leishmanial activity). Further, mechanistic studies reveal that the present phosphonylation protocol follows a radical pathway.