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Síntese e avaliação biológica de 1,3,4-oxadiazóis derivados da isoniazidaCaneschi, Wiliam 22 February 2013 (has links)
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Previous issue date: 2013-02-22 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Diversos análogos 1,3,4-oxadiazóis tem sido reportados na literatura uma vez que possuem grande espectro de atividade biológica, como: antiviral, antibacteriano, antitumoral, antioxidante, anti-inflamatório, anticonvulsivante, antimalarial, antifúngica e analgésica. Com o intuito de desenvolver moléculas ativas e seletivas a certas doenças, este trabalho descreve a síntese de derivados N-acilidrazonas e seus respectivos 2,3-diidro-1,3,4-oxadiazóis, o que resultou na obtenção de vinte e sete derivados inéditos, dentre eles: nove derivados de Nacilidrazonas e dezoito derivados 2,3-diidro-1,3,4-oxadiazóis. Foram obtidos vinte e oito derivados N-acilidrazonas a partir de uma reação de adição de aldeídos aromáticos e heteroaromáticos com a isoniazida. Para a obtenção das N-acilidrazonas com cadeia longa, foi proposto, inicialmente, a alquilação do 4-hidroxibenzaldeído com haletos de alquila com: 1-cloroexano, 1-cloro-octano, 1-bromononano, 1-clorodecano, 1-clorododecano, 1-lorotetradecano e 1-bromo-propargila. Foi proposta também a síntese de dois derivados sulfonados, sintetizados pela mesma metodologia de alquilação com os cloretos de mesila e tosila. Em seguida, os aldeídos alquilados e sulfonados sintetizados e dezenove aldeídos comerciais foram condensados a isoniazida gerando os derivados N-acilidrazonas, que por sua vez, foram ciclizados, em reação com anidrido acético, que gerou vinte e sete derivados 2,3-diidro-1,3,4-oxadiazólicos. As estruturas dos compostos
obtidos foram elucidadas por espectroscopia na região do infravermelho, RMN de 1H e de 13C,
técnicas de RMN 2D, espectrometria de massas. Os análogos oxadiazólicos foram submetidos a
teste de citotoxicidade, antibacteriano, antioxidante e antimalarial. Os compostos se mostraram
bastantes ativos contra células cancerígenas, com índices de seletividade superiores ao composto
padrão utilizado. / Several analogs 1,3,4-oxadiazoles have been reported in the literature due to wide range biological activity, such as: antiviral, antibacterial, antitumoral, antioxidant, anti-inflammatory, anticonvulsivant, antimalarial, antifungal e analgesic activity. With the aim to develop molecules active and selective for some illness, this work describe the synthesis of some N-acyl-hydrazones derivatives and the respective 2,3-dihydro-1,3,4-oxadiazoles, that resulted the obtainment twenty seven inedited derivatives, among them: nine N-acyl-hydrazones derivatives and eighteen 2,3-dihydro-1,3,4-xadiazoles derivatives. At this work were obtainment twenty e eight N-acylhydrazones derivatives through the addition reaction of aromatics and heteroaromatics aldehydes with isoniazid. For the obtainment of N-acyl-hydrazones of long chain, the 4-hydroxybenzaldehyde was alkylated with several alkyl halides: 1-chlorohexane, 1-chlorooctane, 1-bromononane, 1-chlorodecane, 1-chlorododecane, 1-hlorotetradecane and 1-bromopropargyl. It was also proposed the synthesis of two sulfa derivatives, synthesized by the same alkylation methodology with the mesyl and tosyl chloride. These alkylated aldehydes and nineteen commercials aldehydes were condensed to the isoniazid that gave the N-acyl-hydrazones derivatives, which in turn were cyclized to obtain the 2,3-dihydro-1,3,4-oxadiazoles derivatives in reaction with acetic anhydride. The structures of the compounds were elucidated by in infrared, ¹H NMR, ¹³C NMR, 2D NMR
techniques, mass spectrometry. The oxadiazoles analogs were submitted to citotoxicity, antibacterial, antioxidant and antimalarial activity. The compounds showed great activity against tumor cells, with selectivity index higher than standard compound used.
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Síntese e avaliação biológica de 1,2,4- e 1,3,4-oxadiazóisCaneschi, Wiliam 20 December 2016 (has links)
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Previous issue date: 2016-12-20 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Os heterociclos oxadiazólicos estão presentes em inúmeras estruturas com diversas propriedades biológicas, por esse motivo, o interesse nessa pesquisa. Desse modo, este trabalho encontra-se dividido em dois capítulos: o primeiro refere-se a síntese de oxadiazóis com intuito de verificar seu potencial biológico, enquanto o segundo, baseia-se no desenvolvimento de novas metodologias para síntese dos derivados 1,2,4 e 1,3,4oxadiazólicos. No primeiro capítulo, vinte e uma substâncias derivadas do heterociclo 1,2,4oxadiazólico foram obtidas por meio de reações de substituição nucleofilica de segunda ordem e trinta e dois novos derivados 1,3,4-oxadiazólicos foram obtidos a partir de reações do tipo Mannich. Os compostos foram testados quanto as suas propriedades citotóxicas e antibacteriana. De um modo geral, os derivados 1,2,4-oxadiazólicos não apresentaram interessantes atividades biológicas. Por outro lado, os regioisômeros 1,3,4- demonstraram um perfil de atividade interessante, sendo mais ativas que aquelas moléculas contendo o grupo piperazina alquilado com doze átomos de carbono. Para a atividade antitubercular, foi verificada uma melhor atividade para os 1,3,4-oxadiazóis alquilados com quatorze átomos de carbono. A busca cada vez maior por metodologias mais simples e eficientes na síntese de novas substâncias, propiciou, neste segundo capítulo, a síntese de uma série de derivados 1,2,4- e 1,3,4-oxadiazólicos obtidos por reações de aminocarbonilação catalisadas por paládio. Vários nucleófilos hidrazidas e amidoximas foram passíveis de reação com diferentes brometos de arila e monóxido de carbono produzido ex situ, em uma reação multicomponente, possibilitando a formação desses heterociclos em altos rendimentos. Essa metodologia se mostrou eficaz na marcação isotópica de ¹³C para diferentes compostos bem como permitiu a síntese do fármaco ataluren com rendimento global de 43%. / Oxadiazoles heterocycles are present in many structures with different biological properties, therefore, the interest in this research. So, this work is divided in two chapters: the first refers to the synthesis of these heterocycles in order to verify its biological potential, while the second is based on the development of new methodologies for synthesis of derivatives 1.2, 4 and 1,3,4-oxadiazoles. In the first chapter, twenty one 1,2,4-oxadiazoles derivatives were obtained by nucleophilic substitution reactions of second order and thirty two new 1,3,4oxadiazoles derivatives were obtained through Mannich-type reactions. The compounds were tested for their anticancer and antibacterial properties. In general, 1,2,4-oxadiazoles derivatives did not show interesting activity against the tested pathologies. On the other hand, 1,3,4-regioisomers demonstrated interesting activity profile, being most active those molecules containing the alkylated piperazine group with twelve carbons chain. For the antitubercular activity, a better activity was verified for the alkylated 1,3,4oxadiazoles with fourteen carbon chain. The search for efficient and simple methods for the synthesis of new molecules, allowed in the second chapter, the synthesis of a number of 1,2,4- and 1,3,4-oxadiazoles derivatives obtained by reactions palladium-catalyzed aminocarbonylation reactions. Various nucleophiles hydrazides and amidoximes were able of reaction with different aryl bromides and carbon monoxide produced ex situ in a multicomponent reaction, enabling the formation of such heterocycles in high yields. This methodology was effective for isotopic ¹³C labeling for different compounds as well as allowed the synthesis of the drug ataluren in an 43% overall yield.
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Fosfinoferrocenové amidy a hydrazidy / Phosphinoferrocene amides and hydrazidesSolařová, Hana January 2011 (has links)
Title: Phosphinoferrocene amides and hydrazides Author: Hana Solařová Department: Department of Inorganic Chemistry Supervisor: doc. RNDr. Petr Štěpnička, Ph.D. Abstract: While studying functionalized phosphinoferrocene ligands, we recently turned to phosphinoferrocene carboxamides. These donors already proved to be versatile ligands for coordination chemistry and catalysis. This led us to synthesize and study the archetypal representative, 1'-(diphenylphosphino)-1-carbamoylferrocene (5), and the corresponding hydrazide 6. PPh2 COOH Fe Hdpf PPh2 CONH2 Fe 5 PPh2 CONHNH2 Fe 6 This work describes the preparation of primary amide 5 and hydrazide 6 from 1'- (diphenylphosphino)-1-ferrocenecarboxylic acid (Hdpf) via the corresponding acylbenzo- triazole derivative. The hydrazide was alternatively obtained from Hdpf methylester and hydrazine hydrate. Both newly synthesized compounds were characterized by spectroscopic methods (NMR, IR, and MS) and elemental analysis, and their crystal structures were determined by single-crystal X-ray crystallography. The amide was further utilized in the preparation of several palladium complexes, which were characterized in a similar manner including X-ray crystallography. One palladium complex was obtained also from the hydrazide. However, the hydrazide was used mainly as a...
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