5-Hydroxypentylammonium acetate as a reusable ionic liquid catalyzes tandem Knoevenagel-phospha-Michael reaction of aldehydes, malononitrile and phosphites
作者:S. Sobhani、M. Honarmand
DOI:10.1007/s13738-012-0088-1
日期:2012.10
5-Hydroxypentylammonium acetate as a task-specific ionic liquid promotes efficient tandem Knoevenagel-phospha-Michael reaction of phosphite esters with aryl/heteroaryl/alkyl/salicylaldehydes and malonitrile/ethyl cyanoacetate at room temperature in short reaction times. This simple procedure allows a series of β-phosphonomalonates and 4-substituted 2-amino-4H-chromenes with phosphonic acid dialkyl esters to be synthesized in good to high yields in the presence of an ionic liquid for the first time.
An eco-friendly procedure for one-pot synthesis of β-phosphonomalonates: micellar solution of sodium stearate catalyzes tandem Knoevenagel–phospha-Michael reaction of aldehydes, malonitrile, and phosphites in aqueous media
作者:Sara Sobhani、Zahra Pakdin Parizi
DOI:10.1016/j.tet.2011.03.014
日期:2011.5
A new, one-pot convenient method for the synthesis of a variety of β-phosphonomalonates by a tandem Knoevenagel–phospha-Michael reaction of phosphite esters with aryl/heteroaryl/alkyl aldehydes and malonitrile in an aqueous micellar solution of sodium stearate is described. This method offers several advantages, such as using a cheap and environmentally benign reaction media, low loadings of sodium
Piperidine and Piperazine Immobilized on Iron Oxide Nanoparticles as Magnetically Recyclable Heterogeneous Catalysts for One-Pot Synthesis of β-Phosphonomalonates
of chloro-functionalized γ-Fe2O3@SiO2 with piperidine and piperazine, respectively. The resulting bases were employed as magnetically recyclable heterogeneouscatalysts for the efficient one-pot three-component synthesis of β-phosphonomalonates. The catalysts were easily separated from the reaction mixture by using a magnet and recycled for five times without significant loss of the catalytic activity
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.
One-Pot Synthesis of <font>β</font>-Phosphonomalonates Catalyzed by Molecular Iodine
作者:Sara Sobhani、Roya Jahanshahi
DOI:10.1080/00397911.2013.768670
日期:2013.12.17
A one-pot procedure has been developed for the synthesis of -phosphonomalonates via P-C bond formation through tandem Knoevenagel-phospha-Michael reaction catalyzed by iodine as a new, inexpensive, nonmetallic, and commercially available catalyst. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) for the following free supplemental resource(s): Full experimental and spectral details.]