Browsing Química - PPGQ by CNPq Subject "CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::SINTESE ORGANICA"
Now showing items 1-20 of 28
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Metodologias sintéticas envolvendo reações fotoquímicas e eletroquímicas em condições de batelada e fluxo contínuo
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 26/04/2023)SYNTHETIC METHODOLOGIES INVOLVING PHOTOCHEMICAL AND ELECTROCHEMICAL REACTIONS IN BOTH BATCH AND CONTINUOUS FLOW CONDITIONS. Initially (Chapter 1), general aspects of the studied reactions were presented and in the chapter ... -
Arilsulfonilação tri componente de diidrofurano e ésteres vinílicos via catálise dual níquel/fotorredox
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 29/03/2022)The pursuit of synthetic protocols aligned to sustainability goals, increasingly necessary in the global context in which we operate, caused a great effort by synthetic chemists to develop photocatalytic methodologies ... -
Desenvolvimento de novas metodologias de acoplamento C-C e/ou C-N: mesclando ciência de dados e catálise metálica
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 06/10/2023)The approach of statistical methods capable of accurately predicting the relationship between structure and reactivity represents a major impact on the development of reactions. Recently, machine learning tools have been ... -
Síntese de uma coleção de cumarinas, possíveis inibidores da enzima acetilcolinesterase
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, , 13/08/2010)Alzheimer's disease is associated with decreased rates of acetylcholine (ACh) in synaptic process, decreasing the cortical cholinergic transmission, and other neurotransmitters such as norepinephrine, dopamine, serotonin, ... -
Asymmetric induction on isocyanide-based transformations: development of stereoselective Ugi-type reactions
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 26/05/2023)The design of new synthetic transformations that rapidly allow construction of structurally complex molecules from simple starting materials under both concepts of diversity and function-oriented syntheses is extremely ... -
Reações de fotooxigenação de pinenos em pinocarvonas, trans-pinocarveóis e mirtenal: uma abordagem em regime de fluxo contínuo
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 18/04/2022)In this work, a continuous flow protocol to prepare (-)-pinocarvone, (-)-trans- pinocarveol and (+)-myrtenal from (+)--pinene, (-)--pinene and -pinene through photooxygenation reactions was described. Furthermore, ... -
Parametrização de ligantes em Co(salen) aplicados na despolimerização de ligninas
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 26/05/2022)Since the industrial revolution, fossil sources such as oil, natural gas or coal have become indispensable resources for human development with a variety of uses: from energy generation to drugs production and household ... -
Reações multicomponentes de Diels-Alder com parabenzoquinonas : intermediários para Sesquiterpenos Eudesmanos
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, , 20/09/2010)In the first part of this thesis we describe the study of the oxidation of phenols to p-benzoquinones. The metal complexes used as catalysts in this study are: [CoII(salen)], [CoII(dmsalen)], [CoII(salpn)], [CoII(dmsalpn)], ... -
Sintese e avaliação de peptidomiméticos contendo heterociclos de três membros como inibidores de catepsina L
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 01/12/2017)Cathepsin L is a lysosomal cysteine protease, that is related to many physiological processes, however overexpression and up- or downregulation may cause several pathologies. Therefore, cathepsin L became an interesting ... -
Estudo de formação de tris-acetal internoe espiro-carbocíclicos a partir de (R)-(–)-e espiro-carbocíclicos a partir de (R)-(–)
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 07/11/2016)In this work we studied, initially, the formation of the internal tris-ketals derivatives from their respective 2,2-bis-propargyl cyclic ketones from catalysis by gold complexes. The reaction conditions were studied for ... -
A reação de Diels-Alder de p-Benzoquinonas em versão multicomponente
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, , 24/08/2005)A study of the multicomponent version of the Diels-Alder reaction of para-benzoquinones has been proposed, with the idea of uniting the versatility of the reaction with the simplicity of the methodology. The key step ... -
Nanoestructured catalysts for organic reactions: design, synthesis and applications
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 29/07/2016)The development of more efficient and selective catalysts actively contributes for the design of safer, cleaner and less energy-demanding processes, and, therefore, catalysis is one of the cornerstones of green chemistry. ... -
Síntese assimétrica dos componentes do feromônio sexual da lagarta-parda, Thyrinteina arnobia (Lepidoptera: Geometridae)
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 31/01/2013)The pheromones play an important role in chemical communication between alive organisms. They can be used in agriculture to pest control. The brown-caterpillar, Thyrinteina arnobia, is considered in Brazil a major pest of ... -
Combinação de reações organocatalíticas e multicomponentes para a síntese de sistemas heterocíclicos e moleculas híbridas
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 08/02/2019)Small enantiomerically pure or enriched organic molecules are key starting materials in organic synthesis. Chiral building blocks are in high demand in the overall synthesis of complex natural products and in the discovery ... -
Tecnologias em fluxo contínuo de compostos cicloeptânicos derivados da (R)-(–)-carvona e do fragmento C23-C31 usado na síntese total dos policetídeos spirangien A metil éster e spirodienal A
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 20/05/2015)Continuous flow technology of cycloheptanic compounds derived from (R)-(–)-carvone and the C23-C31 fragment used in the total synthesis of spirangien A methyl ester and spirodienal A polyketides” In the first part of ... -
Síntese de furanos trissubstituídos via reações de oxopaladação aeróbica
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 25/02/2019)Furans are important heterocyclics with broad application in synthesis as a building block, frequently presented in a wide range of compounds that exhibit biological activity, including natural products. Intramolecular ... -
Flow Chemistry: From assembly to the application
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 17/12/2018)Over the centuries, chemical reactions have been carried out in the same way in standardized glassware. On the other hand, continuous flow reactions are gaining interest regularly and demand for the related hardware toolkit ... -
Synthesis of N-heterocycles and building blocks using multicomponent, photochemical and electrochemical approaches
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 17/02/2020)Multicomponent reactions and protocols mediated by light and electrochemistry are powerful tools for modern organic synthesis. Moreover, they obey several principles of green chemistry such as atom economy, catalysis, waste ... -
Flow chemistry applied to hazardous reactions, and fluorophores synthesis with photophysics studies
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 20/02/2020)Two distinct cases of continuous flow conditions applied to dangerous reactions are described. The first example is the continuous photooxygenation of a series of dienes that produces endoperoxides and / which are potentially ... -
Funcionalização de 5-iodo-1,2,3-triazóis e síntese de seleno- e tioésteres por meio de reações de acoplamento carbonilativo empregando monóxido de carbono gerado ex situ
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 06/06/2022)The use of pressurized carbon monoxide (CO) gas cylinders can lead to serious risks during their handling. Hence, the demand for safer carbonylation methods has been gradually increasing with the use of different techniques ...