41882-47-7Relevant articles and documents
Redox-Neutral Imination of Alcohol with Azide: A Sustainable Alternative to the Staudinger/Aza-Wittig Reaction
Li, Huaifeng,Lupp, Daniel,Das, Pradip K.,Yang, Li,Gon?alves, Théo P.,Huang, Mei-Hui,El Hajoui, Marwa,Liang, Lan-Chang,Huang, Kuo-Wei
, p. 4071 - 4076 (2021/04/12)
The traditional Staudinger/aza-Wittig reaction represents one of the most powerful tools for imine formation. However, for this multistep procedure, the sacrificial phosphine has to be used, resulting in difficulties in the purification process and waste disposal at the same time. Here, we report a redox-neutral azide-alcohol imination methodology enabled by a base-metal nickel PN3 pincer catalyst. The one-step, waste-free, and high atom-economical features highlight its advantages further. Moreover, mechanistic insight suggests a non-metal-ligand cooperation pathway based on the observation of an intermediate and density functional theory calculations.
Cyclometalated Half-Sandwich Iridium(III) Complexes: Synthesis, Structure, and Diverse Catalytic Activity in Imine Synthesis Using Air as the Oxidant
Li, Rong-Jian,Ling, Chun,Lv, Wen-Rui,Deng, Wei,Yao, Zi-Jian
, p. 5153 - 5162 (2021/05/04)
Four air-stable cyclometalated half-sandwich iridium complexes 1-4 with C,N-donor Schiff base ligands were prepared through C-H activation in moderate-to-good yields. These complexes have been well characterized, and their exact structure was elaborated on by single-crystal X-ray analysis. The iridium(III) complexes 1-4 showed good catalytic activity in the imine synthesis under open-flask conditions (air as the oxidant) from primary amine oxidative homocoupling, secondary amine dehydrogenation, and the cross-coupling reaction of amine and alcohol. Substituents bonded on the ligands of the iridium complexes displayed little effect on the catalytic efficiency. The stability and good catalytic efficiency of the iridium catalysts, mild reaction conditions, and substrate universality showed their potential application in industrial production.
Highly efficient microwave assisted synthesis of magnetically separable GO-CoFe2O4 nanocomposite for visible light induced oxidative coupling of benzyl amines
Jain, Suman L.,Khatri, Praveen K.,Sadanandan, Aathira M.
, (2020/06/26)
The present paper describes an efficient microwave-assisted synthesis of magnetic CoFe2O4 and its nanocomposite with graphene oxide (GO-CoFe2O4) for photocatalytic oxidative coupling of benzylamines to the corresponding imines using molecular oxygen. The surface morphologies and structures of both CoFe2O4 and GO-CoFe2O4 nanocomposites were investigated by various spectroscopic techniques including powder X-ray diffraction (XRD), Transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption–desorption isotherms, X-ray photoelectron spectroscopy (XPS) and Raman Spectroscopy. Photocatalytic oxidative coupling experiments demonstrated that GO-CoFe2O4 exhibited significantly higher efficiency than CoFe2O4 nanoparticles, suggesting that GO played an important role in the reaction. Moreover, the magnetic nature of the synthesized nanocomposite provided facile recovery of the material by the influence of an external magnet.
