404365-75-9Relevant academic research and scientific papers
Intramolecular O-arylation using nano-magnetite supported N-heterocyclic carbene-copper complex with wingtip ferrocene
Naikwade, Altafhusen,Jagadale, Megha,Kale, Dolly,Gajare, Shivanand,Bansode, Prakash,Rashinkar, Gajanan
, (2019/07/15)
Nano-magnetite supported N-heterocyclic carbene-copper complex with wingtip ferrocene has been prepared via multi-step procedure. The complex has been characterized by various analytical techniques such as fourier transform infrared (FT-IR), fourier transform Raman (FT-Raman), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM) analysis. The catalytic activity of the complex has been exploited in intramolecular O-arylation of o-iodoanilides under heterogeneous conditions. The complex could be successfully recycled up to twelve consecutive cycles.
Magnetic Nanoparticle Decorated N-Heterocyclic Carbene–Nickel Complex with Pendant Ferrocenyl Group for C–H Arylation of Benzoxazole
Naikwade, Altafhusen,Jagadale, Megha,Kale, Dolly,Gajare, Shivanand,Rashinkar, Gajanan
, p. 3178 - 3192 (2018/08/25)
Abstract: Magnetic nanoparticle decorated N-heterocyclic carbene–nickel complex with pendant ferrocenyl group has been prepared by multi-step procedure. The formation of complex was confirmed on the basis of analytical techniques such as Fourier transform infrared (FT-IR), Fourier transform Raman (FT-Raman) and X-ray photoelectron spectroscopy (XPS) as well as by X-ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM) analysis. The complex proved to be an efficient heterogeneous catalyst for C–H arylation of benzoxazole with aryl boronic acids. The recycling studies revealed that complex could be reused for six times without significant decrease in catalytic activity. Graphical Abstract: [Figure not available: see fulltext.].
Rotational energy barrier of 2-(2′,6′-dihydroxyphenyl) benzoxazole: A case study by NMR
Chen, Weihua,Twum, Eric B.,Li, Linlin,Wright, Brian D.,Rinaldi, Peter L.,Pang, Yi
experimental part, p. 285 - 290 (2012/03/08)
2-(2′-Hydroxyphenyl)benzoxazole (HBO) derivatives represent an important class of luminescent materials, as they can undergo excited state intramolecular proton transfer (ESIPT). The material's ESIPT properties are dependent on the ratio of two different
Excited-state intramolecular proton transfer in 2-(2′,6′-dihydroxyphenyl)benzoxazole: effect of dual hydrogen bonding on the optical properties
Chen, Wei-Hua,Pang, Yi
experimental part, p. 1914 - 1918 (2010/09/07)
2-(2′,6′-Dihydroxyphenyl)benzoxazole (DHBO) has been synthesized by using palladium-catalyzed oxidative cyclization. The compound utilizes both O-H···N and O-H···O bonds to ensure a coplanar structure between the benzoxazole and phenol fragments. Optical comparison with the parent compound 2-(2′-hydroxyphenyl)benzoxazole (HBO) reveals that the dual hydrogen bonding in DHBO plays an essential role in raising the desirable keto emission for ESIPT and tuning the polarity sensitivity toward the molecular environment. DHBO also exhibits a higher quantum yield (φ{symbol}fl = 0.108 in methanol) than HBO (φ{symbol}fl = 0.0025) in the same solvent.
Pd-catalyzed decarboxylative arylation of thiazole benzoxazole, and polyfluorobenzene with substituted benzoic acids
Xie, Kai,Yang, Zhiyong,Zhou, Xingjian,Li, Xiujian,Wang, Sizhuo,Tan, Ze,An, Xiangyu,Guo, Can-Cheng
supporting information; experimental part, p. 1564 - 1567 (2010/06/16)
(Figure Represented) A Pd-catalyzed decarboxylative coupling of thiazoles and benzoxazole with various substituted benzoic acids Is developed. The reaction is compatible with both electron-rich and electron-poor benzoic acids. It can also be extended to the synthesis of polyfluoro-substituted biaryls using polyfluorobenzenes as the starting materials.
