9 research outputs found
Titanium dioxide doped with vanadium as effective catalyst for selective oxidation of diphenyl sulfide to diphenyl sulfonate
Chemoenzymatic Synthesis of Nitrogen Polymers with Biomedical Applications Catalyzed by Lipases
The application of Candida antarctica lipase B as catalyst in the synthesis of two examples of nitrogen polymers is described. Firstly, we report anovel linear polyamidoamine oligomer, obtained by polymerization of ethyl acrylate and N-methyl-1,3-diaminopropane, catalyzed by Candida antarctica lipase B immobilized on polypropylene. The second part of the chapter describes an efficient route for the synthesis of a novel β-peptoid oligomer with hydroxyalkyl pendant groups in the nitrogen atom, through the polymerization of ethyl N-(2-hydroxyethyl)-β-alaninate catalyzed by Candida antarctica lipase B physically adsorbed within a macroporous poly(methyl methacrylate-co-butyl methacrylate) resin.Moreover,two derivatives of the β-peptoid oligomer were prepared: by acetylation and by grafting polycaprolactone. This last process was performed through ring opening polymerization of caprolactone from the β-peptoid pendant hydroxyl groups and afforded a brush copolymer. The products were blended with polycaprolactone to make films by solvent casting. The inclusion of the acyl derivatives of the β-peptoid to polycaprolactone affected the morphology of the film yielding micro- and nanostructured patterns.The obtained products showed biomedical applications.Fil: Baldessari, Alicia. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Unidad de Microanálisis y MĂ©todos FĂsicos en QuĂmica Orgánica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Unidad de Microanálisis y MĂ©todos FĂsicos en QuĂmica Orgánica; ArgentinaFil: Garcia Liñares, Guadalupe Eugenia. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Unidad de Microanálisis y MĂ©todos FĂsicos en QuĂmica Orgánica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Unidad de Microanálisis y MĂ©todos FĂsicos en QuĂmica Orgánica; Argentin
Bimetallic AgCu/SBA-15 System: The Effect of Metal Loading and Treatment of Catalyst on Surface Properties
Copper incorporated mesoporous materials: synthesis, characterization and catalytic activity in benzaldehyde reduction
Titanium dioxide doped with vanadium as effective catalyst for selective oxidation of diphenyl sulfide to diphenyl sulfonate
Elucidating Iron Speciation Tuned by Handling Metal Precursor for more Efficient Designing of Nanostructured Fenton Catalysts
Zeolite MCM-22 Modified with Au and Cu for Catalytic Total Oxidation of Methanol and Carbon Monoxide
Quinolines and Quinolones as Antibacterial, Antifungal, Antivirulence, Antiviral and Anti-parasitic Agents
Infective diseases have become health threat of
a global proportion due to appearance and
spread of microorganisms resistant to majority
of therapeutics currently used for their treatment.
Therefore, there is a constant need for
development of new antimicrobial agents, as
well as novel therapeutic strategies.
Quinolines and quinolones, isolated from
plants, animals, and microorganisms, have
demonstrated numerous biological activities
such as antimicrobial, insecticidal, antiinflammatory,
antiplatelet, and antitumor. For
more than two centuries quinoline/quinolone
moiety has been used as a scaffold for drug
development and even today it represents an
inexhaustible inspiration for design and development
of novel semi-synthetic or synthetic
agents exhibiting broad spectrum of
bioactivities. The structural diversity of
synthetized compounds provides high and
selective activity attained through different
mechanisms of action, as well as low toxicity
on human cells. This review describes quinoline
and quinolone derivatives with
antibacterial, antifungal, anti-virulent,
antiviral, and anti-parasitic activities with the
focus on the last 10 years literature