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Now showing items 1-10 of 10

    • A facile one-pot synthesis of 8-oxo-7,8-dihydro-(2′-deoxy)adenosine in water 

      Chryssostomos, Chatgilialoglu; Navacchia, Maria Luisa; Postigo, Al (Universidad de Belgrano - Facultad de Ciencias Exactas y Naturales - Proyectos de Investigación, 2006)
      Reaction of 2-mercaptoethanol with 8-bromo-2′-deoxyadenosine and 8-bromo-adenosine in aqueous solution and in the presence of triethylamine gave the 8-oxo-adenine derivatives in very good yields. Some mechanistic details ...

    • Different radical initiation techniques of hydrosilylation reactions of multiple bonds in water: thermal and photochemical initiation 

      Calandra, Julia; Postigo, Al; Russo, Diana; Sbarbati Nudelman, Norma; Tereñas, Juan José (Universidad de Belgrano - Facultad de Ciencias Exactas y Naturales - Proyectos de Investigación, 2010)
      The classical radical-based hydrosilylation reaction of organic compounds bearing C C multiple bonds is usually carried out in organic solvents and is herein presented in water with both hydrophobic and hydrophilic substrates. ...

    • Hydrosilylation of C−C Multiple Bonds Using (Me3Si)3SiH in Water. Comparative Study of the Radical Initiation Step 

      Postigo, Al; Kopsov, Sergey; Zlotsky, Simon S.; Ferreri, Carla; Chatgilialoglu, Chryssostomos (Universidad de Belgrano - Facultad de Ciencias Exactas y Naturales - Proyectos de Investigación, 2009)
      The classical radical-based hydrosilylation reaction of organic compounds bearing C−C multiple bonds is usually carried out in organic solvents and is herein presented in water with both organic solvent-soluble and ...

    • (Me3Si)3SiH-Mediated Intermolecular Radical Perfluoroalkylation Reactions of Olefins in Water 

      Barata-Vallejo, Sebastián; Postigo, Al (Universidad de Belgrano - Facultad de Ciencias Exactas y Naturales - Proyectos de Investigación, 2010)
      Perfluoroalkyl-substituted compounds are regarded as important components of fluorophors and for the introduction of fluorous tags into organic substrates. Their syntheses in organic solvents are achieved through different ...

    • Organic Synthesis in Water Mediated By Silyl Radicals 

      Barata-Vallejo, Sebastian; Sbarbati Nudelman, Norma; Postigo, Al (Universidad de Belgrano - Facultad de Ciencias Exactas y Naturales - Proyectos de Investigación, 2011)
      This account is focused on highlighting the recent advances on synthetically-useful organic reactions employing siliconcentered radicals in water, and presenting new reactions in water, mediated by silyl radicals. In doing ...

    • Photochemical Generation of Silicon-centered Radicals and their Reactions 

      Postigo, Al (Universidad de Belgrano. Facultad de Ciencias Exactas y Naturales. Investigación, 2008)
      This chapter is organized according to classes of silicon-containing compounds that give rise to silyl-centered radicals through photolytic methods, then reviewing their reactivity, their spectroscopic data, and their ...

    • Radiation Chemical Studies of Methionine in Aqueous Solution: Understanding the Role of Molecular Oxygen 

      Barata-Vallejo, Sebastián; Ferreri, Carla; Postigo, Al; Chatgilialoglu, Chryssostomos (Universidad de Belgrano. Facultad de Ciencias Exactas y Naturales. Investigación, 2010)
      The oxidation of methionine is an important reaction in the biological milieu. Despite a few decades of intense studies, several fundamental aspects remain to be defined. We have investigated in detail the γ-radiolysis ...

    • Solvent effects on the reactivity of fluorenyl nitrenium ion with DNA-like probes 

      McClelland, Robert A.; Postigo, Al (Universidad de Belgrano - Facultad de Ciencias Exactas y Naturales - Proyectos de Investigación, 2006)
      Laser Flash Photolysis (LFP) experiments carried out on 2-azidofluorene in aqueous systems generate 2-fluorenyl nitrenium ion (λmax = 450 nm) which decays with first order rate constant and is quenched with 2′-deoxyguanosine ...

    • Streamlining free radical green chemistry 

      Perchyonok, Tamara; Lykakis, Ioannis; Postigo, Al (Universidad de Belgrano. Facultad de Ciencias Exactas y Naturales. Investigación, 2012)
      This practical and concise guide showcases the sustainable methods offered by green free radical chemistry and summarizes the fundamental science involved. It discusses free radical chemistry in aqueous systems for synthetic ...

    • Synthetic Organometallic Radical Chemistry in Water 

      Postigo, Al (Universidad de Belgrano. Facultad de Ciencias Exactas y Naturales. Investigación, 2009)
      Several organic radical transformations in aqueous media using organometallic chemistry are presented. Group XIV-elements, such as Si and Ge, and Sn-centered radicals make use of novel methodologies in water which employ ...