A quaternary ammonium salt [H-dabco][AcO]: as a recyclable and highly efficient catalyst for the one-pot synthesis of β-phosphonomalonates
作者:Ya-Qin Yu、Da-Zhen Xu
DOI:10.1039/c5ra02743h
日期:——
A simple, green and highly efficient approach for the one-potthree-componentsynthesis of β-phosphonomalonates has been developed. In the presence of the quaternary ammonium salt catalysts, the β-phosphonomalonates were obtained in excellent yields within short times viatandem Knoevenagel–phospha-Michael reaction. The reaction of aldehydes/ketones, active methylene compounds, and diethyl phosphite
HClO4-SiO2 as a Novel and Recyclable Catalyst for the Phospha-Michael Addition of Phosphorous Nucleophiles to α,β-Unsaturated Malonates
作者:Sara Sobhani、Soodabeh Rezazadeh
DOI:10.1055/s-0029-1220069
日期:2010.6
An efficient synthesis of β-phosphono malonates via phospha-Michael addition of phosphorous nucleophiles to α,β-unsaturated malonates in the presence of HClO4-SiO2 as a new and recyclable catalyst is described.
A practical and highly efficient protocol for multicomponent synthesis of β-phosphonomalononitriles and 2-amino-4H-chromen-4-yl phosphonates using diethylamine as a novel organocatalyst
has been demonstrated for the first time to be a highly efficient organocatalyst in the solvent-free synthesis of β-phosphonomalononitriles by a three component condensation of aldehyde, malononitrile and dialkyl phosphite at ambient temperature. The applicability of the same catalyst in the synthesis of diethyl (2-amino-3-cyano-chromene-4-yl) phosphonic acid esters has also been described.
Phosphomolybdic acid: An efficient and reusable catalyst for the synthesis of β-phosphono malonates
作者:S. Sobhani、S. Rezazadeh
DOI:10.1007/bf03246216
日期:2011.3
Phosphomolybdic acid (H3PMo12O40) is an efficient and reusablecatalyst for the synthesis of the phospha-Michael addition of phosphite esters with different types of α,β-unsaturated malonates to produce a variety of β-phosphono malonates.
磷钼酸(H 3 PMo 12 O 40)是一种有效且可重复使用的催化剂,用于合成具有不同类型的α,β-不饱和丙二酸酯的亚磷酸酯的phospha-Michael加成,以生产各种β-膦酰基丙二酸酯。
Iron-doped single walled carbon nanotubes as an efficient and reusable heterogeneous catalyst for the synthesis of organophosphorus compounds under solvent-free conditions
Iron-doped single walled carbon nanotubes (Fe/SWCNTs) is an efficient, eco-friendly, and reusableheterogeneouscatalyst for the synthesis of diversely decorated α-aminophosphonates via multicomponent reaction of amines, carbonyl compounds, and phosphorus compounds undersolvent-freeconditions. This methodology illustrates a very simple procedure, with wide applicability, extending the scope to aliphatic