نتایج جستجو برای: ullmann reaction
تعداد نتایج: 412658 فیلتر نتایج به سال:
We report the synthesis of extended two-dimensional organic networks on Cu(111), Ag(111), Cu(110), and Ag(110) from thiophene-based molecules. A combination of scanning tunnelling microscopy and X-ray photoemission spectroscopy yields insight into the reaction pathways from single molecules towards the formation of two-dimensional organometallic and polymeric structures via Ullmann reaction deh...
There has been considerable interest in the development of novel compounds with anticonvulsant, antioxidant, antibacterial, and antifungal activities. The present study explores antimicrobial activity some new arylidene hydrazide derivatives correlates effect on potency by varying substituents part arylidine hydrazide. Hydrazones possessing an azomethine–NHN=CH- proton constitute important clas...
Two different approaches to the eleven-membered biaryl ether lactones of the aspercyclide family are disclosed. The core regions of these highly strained targets, which are able to interfere with the binding of immunoglobulin E to its high affinity receptor, can either be forged by ring-closing olefin metathesis (RCM) or by a highly diastereoselective chromium-mediated Nozaki-Hiyama-Kishi (NHK)...
A method for preparation of a new stable Cu(I) catalyst supported on weakly acidic polyacrylate resin without additional stabilizing ligands is described. A simple and efficient methodology for Ullmann Cu(I) catalyzed C-N cross coupling reactions using this original catalyst is reported. Coupling reactions of 4-chloropyridinium chloride with anilines containing electron donating (EDG) or electr...
Pagano, L., Cornely, O.A., Busca, A., Caira, M., Cesaro, S., Gasbarrino, C., Girmenia, C., Heinz, W.J., Herbrecht, R., Lass-Flörl, C., Nosari, A., Potenza, L., Racil, Z., Rickerts, V., Sheppard, D.C., Simon, A., Ullmann, A.J., Valentini, C.G., Vehreschild, J.J., Candoni, A., Vehreschild, M.J.G.T. Combined antifungal approach for the treatment of invasive mucormycosis in patients with hematologi...
A convenient CuI/L-proline-catalyzed, two-step one-pot method has been developed for the preparation of indolo[1,2-a]quinazoline derivatives using a sequential Ullmann-type C-C and C-N coupling. This protocol provides an operationally simple and rapid strategy for preparing indolo[1,2-a]quinazoline derivatives and displays good functional group tolerance. All the starting materials are commerci...
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