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.
Lanthanum(<scp>iii</scp>) triflate supported on nanomagnetic γ-Fe<sub>2</sub>O<sub>3</sub>: a new magnetically recyclable heterogeneous Lewis acid for the one-pot synthesis of β-phosphonomalonates
作者:Sara Sobhani、Zahra Pakdin-Parizi
DOI:10.1039/c4ra00543k
日期:——
A new magnetically recyclable heterogeneous Lewis acid was synthesized and used for the one-pot synthesis of β-phosphonomalonates.
一种新的可磁性回收的非均相路易斯酸被合成,并用于β-磷酸马隆酸酯的一锅合成。
Nano n-propylsulfonated γ-Fe2O3 as magnetically recyclable heterogeneous catalyst for the efficient synthesis of β-phosphonomalonates
作者:Sara Sobhani、Zahra Pakdin Parizi、Nasrin Razavi
DOI:10.1016/j.apcata.2011.09.039
日期:2011.12
nanomagnetic iron oxide was synthesized directly through ring opening reaction of 1,3-propanesultone with nano magnetic γ-Fe2O3 and used as magnetically recyclableheterogeneouscatalyst for the efficient one-pot synthesis of β-phosphonomalonates. The catalyst was easily isolated from the reaction mixture by magnetic decantation using an external magnet and reused at least five times without significant degradation