Síntesis y caracterización cristalográfica de 8-nitro y 5-nitro-2-(4´-nitrofenil) lepidinas con potencial actividad biológica
dc.contributor.advisor | Henao Martinez, Jose Antonio | |
dc.contributor.advisor | Urbina Gonzalez, Juan Manuel | |
dc.contributor.author | Villamizar Caballero, Claudia Patricia | |
dc.date.accessioned | 2024-03-03T22:43:31Z | |
dc.date.available | 2016 | |
dc.date.available | 2024-03-03T22:43:31Z | |
dc.date.created | 2016 | |
dc.date.issued | 2016 | |
dc.description.abstract | Durante décadas el estudio de los compuestos quinolínicos ha tenido gran relevancia debido a su presencia en una gran variedad de compuestos naturales y a su potencial actividad biológica; de ellos, los compuestos nitroquinolínicos han sido de gran interés debido a su promisoria actividad farmacológica, principalmente como compuestos anti-parasitarios, leishmanicidas y antibacteriales. Los compuestos 8-nitro-2-(4’-nitrofenil) lepidina y la 6-metil-5-nitro-2-(4’-nitrofenil) lepidina se prepararon a través de una ciclación tipo Friedel-Crafts de N-(α-alilbencil)anilinas, su posterior aromatización por medio de una oxidación con azufre (S8) y de una nitración para obtener las correspondientes nitro-lepidinas. Los productos se cristalizaron en mezclas apropiadas de acetato de etilo / heptano y así se obtuvieron los monocristales adecuados, que se caracterizaron por FTIR, RMN 1 H, 13C y DRX de monocristal. Los productos cristalinos fueron sometidos además a un estudio termogravimétrico (TGA) y calorimetría diferencial de barrido (DSC). Usando la 2-fenil lepidina y la 2-fenil-6-metil lepidina como sustratos modelo de la nitración electrofílica aromática, se calcularon sus respectivas cargas de Mulliken y sus orbitales HOMOLUMO, cuyos valores se correlacionaron con los productos observados por DRX de monocristal; los datos de DRX confirmaron inequívocamente la dinitración de las lepidinas, mostrando para la 8- nitro-2-(4’-nitrofenil) lepidina que existen 16 moléculas por celda unidad, en un sistema ortorrómbico con grupo espacial Pbca (No. 61). Para la 6-metil-5-nitro-2-(4’-nitrofenil) lepidina se determinó que existen 8 moléculas por celda unidad, en un sistema monoclínico con un grupo espacial P21/n (No. 14). | |
dc.description.abstractenglish | Synthesis and crystalographic characterization of 8-nitro and 5- nitro-2-(4’-nitrophenyl) lepidines with potential biological activity | |
dc.description.degreelevel | Pregrado | |
dc.description.degreename | Químico | |
dc.format.mimetype | application/pdf | |
dc.identifier.instname | Universidad Industrial de Santander | |
dc.identifier.reponame | Universidad Industrial de Santander | |
dc.identifier.repourl | https://noesis.uis.edu.co | |
dc.identifier.uri | https://noesis.uis.edu.co/handle/20.500.14071/34962 | |
dc.language.iso | spa | |
dc.publisher | Universidad Industrial de Santander | |
dc.publisher.faculty | Facultad de Ciencias | |
dc.publisher.program | Química | |
dc.publisher.school | Escuela de Química | |
dc.rights | http://creativecommons.org/licenses/by/4.0/ | |
dc.rights.accessrights | info:eu-repo/semantics/openAccess | |
dc.rights.creativecommons | Atribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0) | |
dc.rights.license | Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) | |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0 | |
dc.subject | Quinolinas | |
dc.subject | Compuestos Nitroquinolínicos | |
dc.subject | Monocristales | |
dc.subject.keyword | Quinolinic compounds have been from decades of high relevance due to their presence in several natural compounds and to their potential biological activity; from them | |
dc.subject.keyword | nitroquinolinic compounds have been of high interest due to their promising pharmacological activity | |
dc.subject.keyword | mainly as anti-parasitic compounds | |
dc.subject.keyword | as leishmanicidals and as antibacterials. 8-Nitro-2-(4’-nitrophenyl) lepidine and 6-methyl-5-nitro-2-(4’-nitrophenyl) lepidine were prepared through a Friedel-Crafts cyclization reaction of N-(α-allylbenzyl)anilines | |
dc.subject.keyword | aromatization through oxidation with melted sulfur (S8) and a nitration reaction to obtain the corresponding nitro lepidines. The two products were crystallized from proper solvent mixtures of ethyl acetate / n-heptane and good monocrystals were obtained | |
dc.subject.keyword | which were characterized by FT-IR | |
dc.subject.keyword | 1 H and 13C-NMR and XRD of monocrystals. Crystalline products were also subjected to thermogravimetric (TGA) and differential scanning calorimetry (DSC) analyses. Using 2-phenyl lepidine and 2-phenyl-6-methyl lepidine as model substrates for an electrophilic aromatic nitration | |
dc.subject.keyword | Mulliken charges were calculated as well as their HOMO-LUMO orbital energy | |
dc.subject.keyword | with values that were correlated with those products analysed by RXD of monocrystals; XRD data accurately confirmed double nitration of lepidinas | |
dc.subject.keyword | showing for 8-nitro-2-(4’-nitrophenyl) lepidine that they are 16 molecules in the unit cell | |
dc.subject.keyword | in an orthorhombic system with spatial group Pbca (No. 16). For 6-methyl-5-nitro-2-(4’-nitrophenyl) lepidine it was determined that there are 8 molecules in the unit cell | |
dc.subject.keyword | in a monoclinic system with a spatial group P21/n (No. 14). | |
dc.title | Síntesis y caracterización cristalográfica de 8-nitro y 5-nitro-2-(4´-nitrofenil) lepidinas con potencial actividad biológica | |
dc.title.english | Quinolines, Nitroquinolinic Compounds, Monocrystals. | |
dc.type.coar | http://purl.org/coar/version/c_b1a7d7d4d402bcce | |
dc.type.hasversion | http://purl.org/coar/resource_type/c_7a1f | |
dc.type.local | Tesis/Trabajo de grado - Monografía - Pregrado |
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