1411975-52-4Relevant academic research and scientific papers
Synthesis, crystal structure of copper(II) complexes comprising 2-(biphenylazo)phenol and 1-(biphenylazo)naphthol ligands and their catalytic activity in nitroaldol reaction
Nandhini, Raja,Ramesh, Madhan,Prabusankar, Ganesan,Venkatachalam, Galmari
, p. 84 - 88 (2017)
New series of copper(II) complexes of the type [Cu(L)2] (L = L1–L5) comprising bidentate 2-(biphenylazo)phenol (HL1–HL4) and 1-(biphenylazo)naphthol (HL5) ligands have been synthesized. The composition of complexes and ligands (HL1–HL4) has been established by elemental analysis and spectral (FT–IR, UV–Vis, 1H NMR and EPR) methods. Molecular structures of copper complexes [Cu(L3)2] (3) and [Cu(L5)2] (5) were established by X-ray crystallography. These Copper(II) biphenylazo complexes exhibit a very good catalytic activity towards nitroaldol reaction of various aldehydes with nitromethane.
Direct Henry reactions with modified calcium oxide as solid catalyst
Tang, Ying,Gu, Xuefan,Meng, Mei,Xu, Jingfang
, p. 3715 - 3725 (2013/10/22)
Commercial CaO was modified simply with benzyl bromide. The modified CaO had good water resistance, and characterization by FTIR and TG revealed the modifier was chemically bonded to the CaO surface. Commercial CaO and CaO modified with benzyl bromide were investigated as catalysts for the Henry reaction between benzaldehyde and nitromethane. It was found that the catalytic activity of the modified CaO was greatly improved, with high conversion of benzaldehyde to the (E)-phenyl nitroolefin and 1-phenyl-2-nitroethanol, and with different selectivity from commercial CaO. The effect of modification and reaction conditions on yield, selectivity, and mechanism were studied thoroughly.
