- Ionic liquids/H2O systems for the reaction of epoxides with NaN3: A new protocol for the synthesis of 2-azidoalcohols
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Oxiranes undergo ring opening rapidly with sodium azide in a [bmim]BF 4/H2O or [bmim]PF6/H2O (2:1) solvent system, under mild and neutral reaction conditions to afford the corresponding 2-azidoalcohols in high t
- Yadav,Reddy,Jyothirmai,Murty
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- Design, synthesis and biological evaluation of novel 1,2,3-triazolyl β -hydroxy alkyl/carbazole hybrid molecules
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The design, synthesis and biological study of several novel 1,2,3-triazolyl β -hydroxy alkyl/carbazole hybrid molecules as a new type of antifungal agent has been described. In this synthesis, the N-alkylation reaction of carbazol-9-ide potassium salt with 3-bromoprop-1-yne afforded 9-(prop-2-ynyl)-9H-carbazole. The ‘Click’ Huisgen cycloaddition reaction of 9-(prop-2-ynyl)-9H-carbazole with diverse β -azido alcohols in the presence of copper-doped silica cuprous sulphate led to target molecules in excellent yields. The in vitro antifungal and antibacterial activities of title compounds were screened against various pathogenic fungal strains, Gram-positive and/or Gram-negative bacteria. In particular, 1-(4-((9H-carbazol-9-yl) methyl)-1H-1,2,3-triazol-1-yl)-3-butoxypropan-2-ol (10e) proved to have potent antifungal activity against all fungal tests compared with fluconazole and clotrimazole as studied reference drugs. Our molecular docking analysis revealed an appropriate fitting and a potential powerful interaction between compound 10e and an active site of the Mycobacterium P450DM enzyme. The strong hydrogen bondings between β -hydroxyl and ether groups in 10e were found to be the main factors that drive the molecule to fit in the active site of enzyme. The in silico pharmacokinetic studies were used for a better description of 10a–10n as potential lead antifungal agents for future investigations.
- Rad, Mohammad Navid Soltani,Behrouz, Somayeh,Behrouz, Marzieh,Sami, Akram,Mardkhoshnood, Mehdi,Zarenezhad, Ali,Zarenezhad, Elham
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p. 705 - 718
(2016/07/12)
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- Copper/graphene/clay nanohybrid: A highly efficient heterogeneous nanocatalyst for the synthesis of novel 1,2,3-triazolyl carboacyclic nucleosides via 'Click' Huisgen 1,3-dipolar cycloaddition
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A very mild and highly efficient synthesis of some novel 1H-1,2,3-triazolyl carboacyclic nucleosides via a 'Click' Huisgen cycloaddition of N-propargyl nucleobases and azido alcohols using Cu/aminoclay/reduced graphene oxide nanohybrid (Cu/AC/r-GO nanohybrid) as nanocatalyst is described. The preparation and characterization of Cu/AC/r-GO nanohybrid are discussed. This catalyst was characterized by X-ray diffraction, FT-IR, TEM, and energy-dispersive analysis of X-ray techniques. Cu/AC/r-GO nanohybrid is a stable and highly efficient heterogeneous nanocatalyst that can be easily prepared, used, and restored from the reaction mixture by simple filtration, and reused for many consecutive trials without significant decrease in activity.
- Navid Soltani Rad, Mohammad,Behrouz, Somayeh,Jafar Hoseini,Nasrabadi, Hasan,Saberi Zare, Maryam
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p. 1210 - 1224
(2015/09/28)
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- Resolution of racemic 1-azido-3-aryloxy-2-propanols by lipase-catalyzed enantioselective acetylation
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Kinetic resolution of racemic 1-azido-3-aryloxy-2-propanols 1a-g was performed using supported lipase of Candida antarctica-B (Novozym() SP 435) in toluene at 4°C with isopropenyl acetate as the acyl donor to afford the optically active (S)-alcohols 2a-g and their corresponding (R)-acetates 3a-g with E values from 56 to 72. Copyright (C) 2000 Elsevier Science Ltd.
- Pchelka, Beata Krystyna,Loupy, Andre,Plenkiewicz, Jan,Blanco, Luis
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p. 2719 - 2732
(2007/10/03)
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- Lipase-catalyzed kinetic resolution of the racemic mixtures of 1- aryloxy-3-nitrato-and-1-aryloxy-3-azido-2-propanols
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The racemic mixtures of 1-aryloxy-3-nitrato-2-propanols and 1-aryloxy- 3-azido-2-propanols were resolved with moderate selectivity by the lipase- mediated acylation with vinyl acetate. The effects of the nature, position, and spatial requirements of the p
- Pchelka, Beata,Radomska, Justyna,Plenkiewicz, Jan
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p. 4355 - 4364
(2007/10/03)
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