Silica supported polyphosphoric acid (PPA-SiO_2): an efficient and reusable heterogeneous catalyst for the one-pot synthesis of \alpha -amino phosphonates
摘要:
在 80 °C 无溶剂条件下,在 PPA-SiO_2 存在下,采用醛、胺和三烷基膦酸盐之间的单锅三组分缩合反应,描述了制备 \alpha -氨基膦酸盐的高效绿色方案。本方法具有产率高、反应时间短、无毒、可回收和催化剂可重复使用等优点。
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。