Abstract A supported acidic catalyst was easily prepared via anchoring imidazolium salt-based ionicliquid onto multiwalled carbon nanotube by covalent bonds. This novel immobilized acidic ionicliquid effectively catalyzed the one-pot synthesis of α-aminophosphonates from the reaction of amines and aldehydes with diethyl phosphite. The catalyst can be easily recovered and reused without appreciable
Silica gel supported aluminum chloride (SiO2-AlCl3) and cross-linked polystyrene-supported aluminum chloride (PS-AlCl3) are environment- friendly heterogeneouscatalysts for the condensation of amines and aldehydes with diethyl phosphite to afford α-aminophosphonates. These solid acid catalysts are stable (as bench top catalysts) and can be easily recovered and reused without appreciable change in
Commercially available titanocene dichloride was firstly used as an extremely efficient catalyst for a three component one-pot reaction of an amine, an aldehyde (ketone), and a dialkyl phosphite to form α-aminophosphonates under solvent-free conditions at ambient temperature in good to high yields, providing a green, rapid and convenient method for the synthesis of α-aminophosphonates.
A novel hydrophobic copper complex supported on γ-Fe<sub>2</sub>
O<sub>3</sub>
as a magnetically heterogeneous catalyst for one-pot three-component synthesis of α-aminophosphonates
作者:Sara Sobhani、Fatemeh Khakzad
DOI:10.1002/aoc.3877
日期:2017.12
extremely well for the synthesis of α‐aminophosphonates even up to five subsequent trails without significant loss of its catalytic activity or copper leaching. The TEM image and FT‐IR spectrum of the catalyst after five times recovery showed that the structure of the catalyst was stable under the reaction conditions with no change being observed. The strong magnetic properties of the reused catalyst were
A new, convenient and high yielding procedure for the preparation of diethyl α-aminophosphonates in water by one-pot reaction of aldehydes, amines, tri/dialkyl phosphites in the presence of a low catalytic amount of [Cu(3,4-tmtppa)](MeSO4)4 (0.16 mol%) as a highly stable and re-usable catalyst is described.