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。
Phospha-Michael addition of diethyl phosphite to α,β-unsaturated malonates catalyzed by nano γ-Fe2O3-pyridine based catalyst as a new magnetically recyclable heterogeneous organic base
Nano γ-Fe2O3-pyridine based catalyst as a new magnetically recyclable heterogeneous organic base was synthesized. The synthesized odorless pyridine based catalyst was used as a new catalyst for the efficient synthesis of β-phosphonomalonates by the reaction of diethyl phosphite with α,β-unsaturated malonates. The catalyst was easily isolated from the reaction mixture by a magnetic bar and reused at
Pyridine-grafted graphene oxide: a reusable acid–base bifunctional catalyst for the one-pot synthesis of β-phosphonomalonates via a cascade Knoevenagel–phospha Michael addition reaction in water
作者:Sara Sobhani、Farzaneh Zarifi
DOI:10.1039/c5ra13083b
日期:——
different methods such as FT-IR, XRD, TGA, TEM, SEM, EDS, UV-Vis and elemental analysis and employed as a reusable acid–base bifunctional catalyst for the one-potsynthesis of β-phosphonomalonates via a cascade Knoevenagel–phospha Michael addition reaction of aldehydes, malononitrile and dialkyl phosphites in water.
Novel Ionic Tagged Amine Anchored on Magnetic Nanoparticles: An Efficient and Magnetically Recyclable Catalyst for Phospha-Michael Addition
作者:Zhifeng Li、Yuxiang Ni、Fangli Qiu、Anguo Ying、Songlin Xu、Yunlong Wang
DOI:10.1007/s10562-014-1342-1
日期:2014.11
Ionic tagged propyl amine immobilized on magnetic nanoparticles (MNPs) was synthesized and fully characterized. The novel catalyst (MNPs@PA-IL) was applied in phospha-Michael addition and gave the desired beta-phosphonomalonates in good yields. The MNPs supported catalyst with ionic tag could be readily recovered from the reaction mixture using an external magnet. Compared with ionic-free counterpart (MNPs@PA), MNPs@PA-IL present better catalytic activity. The proposed mechanism regarding the MNPs@PA-IL catalyzed phospha-Michael reaction was also discussed.
Efficient one-pot synthesis of β-phosphono malonates and 2-amino-4H-chromen-4-ylphosphonate derivatives by ethylenediamine diacetate-catalyzed three-component reactions
作者:Srinivasa Rao Kolla、Yong Rok Lee
DOI:10.1016/j.tet.2011.10.060
日期:2012.1
One-pot three-component reactions of arylaldehyde or salicylaldehyde with malononitrile (or ethyl-cyanoacetate) and triethyl phosphite are carried out in the presence of ethylenediamine diacetate (EDDA) as a catalyst for the synthesis of biologically interesting beta-phosphono malonates and 2-amino-4H-chromen-4-ylphosphonate derivatives. The value of this method lies in its mild reaction catalyst and conditions, good yields, and ease of handling. (C) 2011 Elsevier Ltd. All rights reserved.