65838-46-2Relevant articles and documents
An abnormal C-H?O bond directs intermolecular bonding arrangements in bisimines
Reyes-Arellano, Alicia,Vega-Ramírez, Leticia,Nájera-Mundo, Jorge A.,Salgado-Zamora, Héctor,Molins, Elies,Peralta-Cruz, Javier,Tamariza, Joaquín
, p. 141 - 148 (2003)
N,N-bis(3-nitrobenzylidene)ethylenediamine (1) formed a supramolecule with meso-hydrobenzoin, whereas N,N-bis(4-nitrobenzylidene)ethylenediamine (2) underwent a self-assembling process. The X-ray diffraction analysis showed that C-H?O intermolecular conta
π-stacked hydrogen-bonded sheets in N,N′-bis(4-nitrobenzylidene) ethane1,2-diamine and π-stacked hydrogenbonded chains in N,N′-bis(4- nitrobenzylidene)propane-1,3-diamine
Bomfim, Joao A. S.,Wardell, James L.,Low, John N.,Skakle, Janet M. S.,Glidewell, Christopher
, p. o53-o56 (2005)
Molecules of A,N′-bis(4-nitrobenzylidene)ethane-1,2-diamine, C 16H14N4O4, (I), lie across centres of inversion in space group P21/n and are linked into (101) sheets by a single C-H...O hydrogen bond [
Facile access to polymer supported zinc–salen complex: highly efficient heterogeneous catalyst for synthesizing hydantoins, thiohydantoins and Schiff bases in aqueous medium
Balinge, Kamlesh Rudreshwar,Khiratkar, Avinash Ganesh,Muskawar, Prashant Narayan,Thenmozhi,Bhagat, Pundlik Rambhau
, p. 2075 - 2097 (2017/12/26)
The synthesis of polymer supported zinc–salen complex (PS-Zn–salen) is described. The mononuclear zinc(II)–salen complex was characterized by Fourier-transform NMR spectroscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectrophotometry (FT-IR), thermogravimetric analysis, scanning electron microscopy, surface area and pore size distribution by Brunauer–Emmett–Teller. The synthesized PS-Zn–salen complex used as a recyclable heterogeneous catalyst for the efficient synthesis of hydantoins, thiohydantoins and Schiff bases in an aqueous medium. The isolated yields of hydantoins, thiohydantoins and Schiff bases achieved up to 89, 95 and 94%, respectively. In spite of conventional heterogeneous catalysts, current PS-Zn–salen complex shows thermal stability up to 280?°C. Moreover, the catalyst could be recovered easily by simple filtration and reused for next run with slightly declining its activity up to six successive runs. The FT-IR spectrum of recycle catalyst after 6th run confirmed that the catalyst was stable during the course of a reaction. The leaching of metal from the PS-Zn–salen is negligible, which was confirmed by AAS and hot filtration test.
Achiral bis-imine in combination with CoCI2: A remarkable effect on enantioselectivity of lipasemediated acetylation of racemic secondary alcohol
Arunkumar,Appi Reddy,Sravan Kumar,Vijaya Kumar,Chandrasekhar,Rajender Kumar,Pal, Manojit
supporting information; experimental part, p. 1174 - 1179 (2011/03/22)
A bis-imine (prepared via a new FeCl3-based method) in combination with CoCl2 facilitated lipase-mediated acetylation of the (R)-isomer of a racemic benzylic secondary alcohol with 91% ees. The methodology was used for the preparation of the known drug rivastigmine.
Studies on the Oxidation of the Azomethine Compounds with 3-Chloroperbenzoic Acid
Mlochowski, J.,Abdel-Latif, F. F.,Kubicz, E.,Said, S. B.
, p. 711 - 722 (2007/10/02)
Oxidation of the azomethine compounds such as Schiff bases and azines having several nucleophilic centers with 3-chloroperbenzoic acid (MCPBA) being an electrophilic oxidant was investigated.From azines 4, bisaldimines 5, 6, and pyridine derived monoaldimines 7, 8, having various substituents on the imine carbon and nitrogen atoms, the products such as nitrones 9, 15, bisoxaziridines 11, 12; acyldiimine 10 and amide 14 were obtained in high yields.The influence of the structure of substrate on the reaction result is discussed.Key words: aldimines, azines, nitrones, oxaziridines
Synthetic Versatility of N(Silylmethyl)imines: Water-Induced Generation of N-Protonated Azomethine Ylides of Nonstabilized Type and Fluoride-Induced Generation of 2-Azallyl Anions
Tsuge, Otohiko,Kanemasa, Shuji,Hatada, Akira,Matsuda, Koyo
, p. 2537 - 2546 (2007/10/02)
N-(Silylmethyl)imines generate N-protonated azomethine ylides of nonstabilized type when treated with water in HMPA, which undergo stereospecific and regioselective cycloadditions with electron-poor olefins affording N-unsubstituted pyrrolidines.On the other hand, fluoride-induced desilylation of the imines leads to 2-azallyl anions which are found to be synthetic equivalents of aminomethyl anion in the Michael additions with electron-poor olefins and nucleophilic additions with carbonyl compounds.
