Metronidazol é o fármaco mais importante do grupo de 5-nitroimidazoles, possuindo toxicidade contra microrganismos anaeróbicos, sendo a molécula de DNA o principal alvo de sua ação biológica. O mecanismo de ação do metronidazol depende do processo de redução do grupo nitro e, em meio ácido, a redução é pH-dependente envolvendo quatro elétrons na completa redução ao derivado hidroxilamínico. Em ...

3 Acknowledgements 5 Abbreviations 6 Part 1: Stereoselective Synthesis of Pyrrolidinones via Nitro-Mannich Reaction

a series of 2-(4-nitro-1-imidazolylmethyl)-1,3,4-oxadiazole, 1,3,4-triazole and 3-(4-nitro-1-imidazolylmethyl)-1,2,4-triazole derivatives were synthesized and tested for their antimicrobial activity. some of the tested compounds were active against staphylococcus aureus, staphylococcus epidermidis, bacillus subtilis, clostridium difficile, aspergillus niger and cryptococcus neoformans.

Molecular devices are reported utilizing active self-assembled monolayers containing the nitroamine @28-amino-4,48-di~ethynylphenyl!-58-nitro-1-benzenethiolate# or the nitro compound @4,48-di~ethynylphenyl!-28-nitro-1-benzenethiolate# as the active components. Both of these compounds have active redox centers. Current–voltage measurements of the devices exhibited negative differential resistanc...

SYNTHESIS 2004, No. 9, pp 1509–1521xx.xx.2004 Advanced online publication: 26.05.2004 DOI: 10.1055/s-2004-822392; Art ID: C0404SS © Georg Thieme Verlag Stuttgart · New York Abstract: The Michael additions of a number of ketones and aldehydes to alkylidene malonates and nitro olefins were studied. The reactions employ small organic molecules as catalyst under mild reaction conditions and do not ...

Magnetically separable gold-nanoparticle catalyst was prepared, and it showed excellent activity for chemoselective reduction of nitroarenes with hydrosilanes.

Abstract A method for the synthesis of functionalized piperidines containing 3 contiguous stereocentres in 2-,3- and 4- positions uses a diastereoselective nitro-Mannich to control stereochemistry. The reaction between β-aryl/heteroaryl substituted nitroalkanes glyoxylate imine provides β-nitro-amines with good selectivity (70:30 >95:5) syn, anti-diastereoisomers. Reductive cyclisation BF3.OEt2...

Local warming of skin induces vasodilation by unknown mechanisms. To test whether nitric oxide (NO) is involved, we examined effects of NO synthase (NOS) inhibition with NG-nitro-L-arginine methyl ester (L-NAME) on vasodilation induced by local warming of skin in six subjects. Two adjacent sites on the forearm were instrumented with intradermal microdialysis probes for delivery of L-NAME and so...

Nitric oxide (NO*) is a gaseous mediator synthesized by nitric oxide synthases. NO* is involved in the modulation of inflammation, but its role in airway inflammation remains controversial. We investigated the role of NO* in the synthesis of the chemokines interleukin-8 and monocyte chemotactic protein-1, and of intercellular adhesion molecule-1 by human airway epithelial cells. normal human br...

Carbon monoxide (CO) is an endogenous dilator in the newborn cerebral microcirculation. Other dilators include prostanoids and nitric oxide (NO), and interactions among the systems are likely. Experiments on anesthetized piglets with cranial windows address the hypothesis that CO-induced dilation of pial arterioles involves interaction with the prostanoid and NO systems. Topical application of ...