Highly efficient one-pot synthesis of α-aminophosphonates using nanoporous AlSBA-15 catalyst in a three-component system
作者:Murali Krishna Kolli、Elamathi Palani、Chandrasekar Govindasamy、Vishweshwar Rao Katta
DOI:10.1007/s11164-018-3458-1
日期:2020.2
range of 480 to 757 m2/g and 0.65 to 0.95 cm3/g, respectively. The catalytic performance of nanoporous AlSBA-15 catalysts are used as an outstanding catalytic system for one-potsynthesis of α-aminophosphonates via Kabachnik-Fields reaction in a three-component system using amines (primary/secondary), carbonyl compounds (aldehydes/ketones) and diethyl phosphite. The major advantages of the present
使用水热法合成了具有不同n Si / n Al比(41、129和210)的纳米多孔AlSBA-15催化剂。这些催化剂通过XRD,N 2吸附,TPD-NH 3,FT-IR,SEM和TEM表征。AlSBA-15催化剂的XRD分析证实,存在具有p6mm对称性的井井有条的晶体结构。比表面积和AlSBA-15的催化剂的比孔体积是在480 757 m的范围内2 /克和0.65〜0.95厘米3/ g。纳米多孔AlSBA-15催化剂的催化性能被用作出色的催化体系,用于在三组分体系中使用胺(伯/仲),羰基化合物(醛/酮)通过Kabachnik-Fields反应一锅合成α-氨基膦酸酯。 )和亚磷酸二乙酯。本发明的主要优点是优异的收率,短的反应时间,简单的实验技术,高的化学选择性,催化剂可回收性,易于处理的程序和绿色方法。α-氨基膦酸酯的三组分合成是首先由胺和醛/酮形成亚胺,然后添加磷酸盐。实验结果表明,纳米多
One‐Pot Preparation of Fluorinated α‐Aminoalkyl Phosphonates under Microwave Irradiation and Solvent‐Free Conditions
method has been developed for the synthesis of fluorine‐containing α‐amino phosphonates in good yields by a three‐component reaction of fluorinated aromatic aldehydes, anilines, and diethyl phosphate in the presence of a silica‐gel support undermicrowaveirradiation within 10 min. All new compounds are fully characterized by spectral methods and elemental analysis.
Highly efficient metal-free one-pot synthesis of <font>α</font>-aminophosphonates through reduction followed by Kabachnik–fields reaction using three-component system
ABSTRACT One-potsynthesis of α-aminophosphonates directly from aryl nitro compounds, aldehydes/ketones, and diethyl phosphite using sodium dithionite through reduction and followed by Kabachnik–Fields reaction under metal-free conditions is reported. The major advantages are excellent yield, high chemoselectivity, neutral reaction medium, and simple experimental procedure. This methodology consists