20575-40-0Relevant articles and documents
Nanoporous lanthanide metal-organic frameworks as efficient heterogeneous catalysts for the Henry reaction
Karmakar, Anirban,Hazra, Susanta,Guedes Da Silva, M. Fátima C.,Paul, Anup,Pombeiro, Armando J. L.
, p. 1337 - 1349 (2016/03/01)
A series of self-assembled lanthanide coordination polymers formulated as [La(L1)2]n·1n(DMF)H·3n(DMF) (1), [Ce(L1)2]n·1n(DMF)H·2n(DMF) (2), [Sm(L1)2]n·1n(HCONH2)H·2n(HCONH2) (3), [La(L2)(HL2)(H2O)(DMF)2]n (4) and [Ce(L2)(HL2)(H2O)(DMF)2]n (5) [H2L1: 2-acetamidoterephthalic acid and H2L2: 2-benzamidoterephthalic acid] has been synthesized from the reactions of H2L1 or H2L2 with different lanthanide salts under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy, X-ray single-crystal diffraction, powder X-ray diffraction, thermogravimetry and photoluminescence spectroscopy. X-ray diffraction analyses reveal that frameworks 1-3 have similar types of three-dimensional structures, composed of L12- ligands and trinuclear lanthanide nodes, in which two crystallographically independent lanthanide atoms are present. Frameworks 4 and 5 are isostructural, featuring a double chain-type one-dimensional coordination polymer which expands to 3D by means of H-bond interactions. These frameworks act as heterogeneous polymeric solid catalysts for the nitroaldol (Henry) reaction of different aldehydes with nitroalkanes, in water, and can be recycled without losing appreciable activity.
Nitroaldol-reaction of aldehydes in the presence of non-activated Mg:Al 2:1 hydrotalcite; A possible new mechanism for the formation of 2-aryl-1,3-dinitropropanes
Cwik, Agnieszka,Fuchs, Aliz,Hell, Zoltán,Clacens, Jean-Marc
, p. 4015 - 4021 (2007/10/03)
Commercially available, non-activated 2:1 Mg:Al hydrotalcite catalyzes the nitroaldol reaction between a variety of aromatic and aliphatic aldehydes and simple nitroalkanes such as nitromethane and nitroethane. A new mechanism is proposed for the formation of the 1,3-dinitropropanes. The threo/erythro diastereoselectivity of the nitroethane-adducts was determined by 1H NMR spectroscopy and was found to range from 50:50 to 70:30. The substituents of the aromatic aldehydes influenced the isomer ratio.
Potassium Phosphate Catalyzed Nitroaldol Reaction
Desai, Uday V.,Pore,Mane,Solabannavar,Wadgaonkar
, p. 19 - 24 (2007/10/03)
Potassium phosphate was found to catalyze condensation of nitroalkanes with various aliphatic and aromatic aldehydes to form nitroaldols in excellent yields in acetonitrile medium at room temperature.